Rate status
Describes when a number applies: a fixed or variable rule, judgment status, a court decision, agency scope, a split regime, a surcharge, deferred end-stage calculation, or unresolved research.
Source-linked legal-rules dataset
Child support arrears interest rates by state (2026)
Compare the current arrears-interest treatment we can support for all 50 states and the District of Columbia. The table separates a published number from its legal scope, method evidence, historical-rate needs, penalties, and unresolved questions.
Version 2026-09-25.1. A blank numeric field means “not safely established,” never zero.
51
Jurisdictions covered
All 50 states plus DC.
35
Positive rates published
Only where a current number is source-supported.
9
Variable or split regimes
One flat rate would conceal a material rule.
10
Rows still under review
Kept visible without inventing a number.
50 states + DC
Current research snapshot
Search by state or filter by rule status. Every jurisdiction remains visible in the initial HTML. A dash means no safe numeric rate is published—not zero.
Showing all 51 jurisdictions.
Swipe the table horizontally to compare every field. State names remain pinned.
| Jurisdiction | Published rate | Rule status | Method | Scope | Penalties / other charges | Evidence | Reviewed sources |
|---|---|---|---|---|---|---|---|
| AlabamaAL | 7.5% | Fixed-rate rule | SimpleMethod inferred | The displayed 7.5% rule applies to child-support judgments entered on or after September 1, 2011; earlier judgments and any statutory rebate require separate treatment.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: pre-September-2011 judgment rate, case-specific interest rebate |
|
| AlaskaAK | 6% | Agency-specific | SimpleMethod inferred | The published rate is tied to Alaska child-support enforcement treatment. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| ArizonaAZ | 10% | Agency-specific | SimpleMethod inferred | Arizona distinguishes missed installments under an order from retroactive past-support judgments, including a September 26, 2008 judgment-date split.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: debt classification, pre-September-2008 past-support treatment, suspension eligibility |
|
| ArkansasAR | 10% | Fixed-rate rule | SimpleMethod inferred | Ark. Code § 9-14-233(a) applies 10% per annum to child support that becomes due and remains unpaid, unless the judgment owner or counsel asks in writing, before a judgment on arrears, that it not accrue. The state child support office adds interest only after a court judgment, another state’s certified sum, or a certified calculation. | Courts must award attorney’s fees of at least 10% of the support due in enforcement actions; that is a fee, not interest. Other fees were not comprehensively reviewed. | Scope verified; fields openOpen: compounding method, agency ledger inclusion, overlap with the § 16-65-114 judgment rate |
|
| CaliforniaCA | 10% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees |
|
| ColoradoCO | 10% | Split regime | Mixed | Colorado uses different rate and compounding regimes based on when the support debt accrued; the displayed number is the current-regime parameter only.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical regime allocation |
|
| ConnecticutCT | — | Under review | Under review | The reviewed Connecticut payment guideline does not establish a statewide arrears-interest rule, so no rate is published. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: interest authority, rate, method, accrual start | State source notes |
| DelawareDE | — | Under review | Under review | The reviewed enforcement provisions do not support a universal numeric interest claim. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: interest authority, rate, method, accrual start | State source notes |
| District of ColumbiaDC | — | Judgment-dependent | Under review | Any interest treatment depends on judgment status and cannot be represented by one universal calculator rate. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: support-specific judgment application, current rate | State source notes |
| FloridaFL | — | Variable rate | Simple | Florida judgment rates are published quarterly; the applicable rate can depend on when the judgment was established.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: installment-level historical rate series |
|
| GeorgiaGA | 7% | Fixed-rate rule | SimpleMethod inferred | The published 7% rule begins after the state-specific delinquency period and may be waived or reduced by a court. | Court waiver or reduction can change the amount; separate fees were not reviewed. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees |
|
| HawaiiHI | 10% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| IdahoID | — | Judgment-dependent | Under review | Idaho’s general judgment rate resets under a market-based formula; the applicable rate depends on the judgment period and support-specific mapping.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: support-specific application, current rate, historical rate series, accrual start | State source notes |
| IllinoisIL | 9% | Judgment-dependent | SimpleMethod inferred | Illinois law provides support-interest treatment, but the state agency does not routinely calculate it administratively. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: agency-ledger inclusion |
|
| IndianaIN | — | Court discretion | Under review | A court may award interest on request; no single automatic statewide rate is modeled. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: court-selected rate, calculation method, award period |
|
| IowaIA | 10% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees |
|
| KansasKS | 10% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| KentuckyKY | 12% | Court discretion | Compound | KRS 360.040(2) sets 12% compounded annually on judgments for unpaid child support, and Kentucky appellate courts treat each delinquent payment as a judgment with interest generally from its due date. Awarding interest is within the family court’s discretion (Harney v. Harney, Ky. App. 2024), so the rate is not automatic on every balance. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: court award decision, agency ledger interest treatment | State source notes |
| LouisianaLA | 7.5% | Variable rate | SimpleMethod inferred | Louisiana judicial interest changes by calendar year; the displayed number is the currently published rate, not a historical ledger rate.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical rate series |
|
| MaineME | 6% | Agency-specific | SimpleMethod inferred | The reviewed Maine rule is tied to agency enforcement and lien treatment. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: non-agency case scope | State source notes |
| MarylandMD | — | Under review | Under review | Pellet permits a discretionary prejudgment-interest award, but its 6% simple rate was stipulated for that case; § 11-107’s separate 10% postjudgment path still needs support-specific mapping. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: court-awarded prejudgment rate and period, postjudgment application, accrual start, ledger method |
|
| MassachusettsMA | 6% | Agency-specific | Simple | DOR assesses 0.5% monthly interest on principal in qualifying full-service cases; interest is not assessed on interest or penalties. | A separate 0.5% monthly penalty can apply under the same regulation and is not included in the interest-only estimator. | Current rule verified | State source notes |
| MichiganMI | — | Surcharge, not interest | Simple | Michigan uses a Treasury-indexed surcharge that may require a willfulness finding; it is not a universal fixed interest rate.Historical rate periods required for a ledger. | The surcharge itself is the reviewed charge; other fees and penalties were not reviewed. | Under reviewOpen: court-order applicability, historical surcharge series | State source notes |
| MinnesotaMN | 0% interest | No current interest | None | Minnesota removed interest on child-support judgments for the current statutory period; older balances can require historical treatment.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: pre-effective-date historical treatment |
|
| MississippiMS | — | Judgment-dependent | Under review | The reviewed authority concerns judgment interest rather than a universal support-ledger rate. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: support-specific application, current rate | State source notes |
| MissouriMO | 12% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| MontanaMT | 12% | Agency-specific | CompoundMethod inferred | The reviewed Montana provision is tied to agency lien/enforcement treatment. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: non-agency case scope, compounding interval evidence | State source notes |
| NebraskaNE | 5.97% | Variable rate | SimpleMethod inferred | Nebraska publishes a periodically changing judgment rate; the displayed figure is a current-period observation.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical rate series | State source notes |
| NevadaNV | 8.75% | Variable rate | Simple | Nevada applies its NRS 99.040 legal rate, prime plus 2 percent reset each January 1 and July 1, from each installment due date. The displayed 8.75% covers all of 2026; a court may omit interest on an undue-hardship finding.Historical rate periods required for a ledger. | The 10% late penalty in former NRS 125B.095 was repealed effective February 1, 2020; penalties that accrued through January 31, 2020 remain due. Fee and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical rate series, case-specific undue-hardship findings |
|
| New HampshireNH | — | Variable rate | Simple | Interest accrues automatically at New Hampshire’s annually reset simple judgment rate; the current numeric rate has not yet been independently confirmed for this dataset.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: current calendar-year numeric rate, historical rate series |
|
| New JerseyNJ | — | Calculated at satisfaction/execution | Under review | New Jersey post-judgment interest is relevant when a support judgment is satisfied or executed; a running calculator rate would misstate that timing.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: ledger timing, historical rates, calculation method |
|
| New MexicoNM | 4% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees |
|
| New YorkNY | 9% | Judgment-dependent | SimpleMethod inferred | New York interest depends on reducing arrears to judgment and can depend on a willfulness finding for the award period. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: case-specific judgment date, willfulness period |
|
| North CarolinaNC | 8% | Judgment-dependent | SimpleMethod inferred | North Carolina’s legal rate applies through judgment treatment, not as a universal agency-ledger assumption. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: support-specific judgment timing | State source notes |
| North DakotaND | 10% | Fixed-rate rule | SimpleMethod inferred | The displayed North Dakota rate is a current-period observation under the reviewed judgment-interest authorities.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical rate series | State source notes |
| OhioOH | — | Court discretion | Under review | An Ohio court may assess interest after a willful-failure finding at the applicable judgment rate.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: court finding, applicable yearly rate, award period |
|
| OklahomaOK | 2% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| OregonOR | 9% | Judgment-dependent | SimpleMethod inferred | Oregon’s 9% simple rule applies to support installments as judgments; historical installment timing still matters.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical ledger |
|
| PennsylvaniaPA | — | Court discretion | Under review | Pennsylvania courts may award the legal judgment rate on overdue support; it is not automatic on every agency balance. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Under reviewOpen: court award, award period, ledger treatment |
|
| Rhode IslandRI | 12% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| South CarolinaSC | 10.75% | Variable rate | Compound | Edwards v. Campbell (S.C. 2006) applies the S.C. Code § 34-31-20(B) post-judgment rate to child support from each installment due date. The displayed 10.75% covers January 15, 2026 through January 14, 2027; the rate is reset each year, older judgments carry 12% or 14%, and a decree can provide otherwise.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical rate series, whether existing judgments move to each new annual rate, agency ledger interest treatment |
|
| South DakotaSD | 12% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| TennesseeTN | — | Split regime | Mixed | From July 1, 2018, non-Title-IV-D arrears accrue 6% unless the court lowers it, including to zero, while Title-IV-D arrears accrue none unless a court makes a written finding, capped at 6%. From April 17, 2017 through June 30, 2018, interest required a written finding and was capped at 4%; earlier arrears accrued 12% from each arrearage date.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: historical period segmentation, case classification, court-selected reduction or written finding, compounding method |
|
| TexasTX | 6% | Fixed-rate rule | SimpleMethod inferred | The displayed 6% simple rule applies to payments due on or after January 1, 2002; older arrears require the prior-law rate and installment-level dates.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: pre-2002 historical rates, installment-level regime allocation |
|
| UtahUT | 5.51% | Variable rate | SimpleMethod inferred | Utah publishes an annual post-judgment rate; the displayed figure is the current calendar-year rate.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: installment-level historical rate series |
|
| VermontVT | 6% | Surcharge, not interest | SimpleMethod inferred | Vermont describes a statutory surcharge; it should not be presented as ordinary judgment interest. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: surcharge assessment and waiver details | State source notes |
| VirginiaVA | 6% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees |
|
| WashingtonWA | 12% | Judgment-dependent | SimpleMethod inferred | Washington law sets 12% on unpaid-support judgments, but DCS does not assess or collect it unless the interest is reduced to a judgment. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: case-specific judicial reduction, agency-ledger inclusion |
|
| West VirginiaWV | 5% | Fixed-rate rule | SimpleMethod inferred | This row identifies the published rule the estimator can support; it does not reconstruct a court or agency ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: scope exceptions, accrual start, penalties and fees | State source notes |
| WisconsinWI | 6% | Agency-specific | SimpleMethod inferred | The displayed 0.5%-monthly agency treatment is tied to the reviewed statewide pilot; Wisconsin used 1% monthly before April 1, 2014.Historical rate periods required for a ledger. | Penalty, fee, waiver, and payment-allocation rules were not comprehensively reviewed for this row. | Scope verified; fields openOpen: pre-April-2014 historical treatment, case eligibility outside the pilot scope | State source notes |
| WyomingWY | 0% interest | No current interest | None | Post-July 1, 1990 support installments that become judgments by operation of law do not bear interest.Historical rate periods required for a ledger. | A separate one-time 10% late-payment penalty can apply after 32 days when statutory affidavit requirements are met; it is not interest and is not included in the estimator. | Current rule verified | State source notes |
Reproducible methodology
How the snapshot is built
- We begin with primary state statutes, court rules and opinions, official rate notices, and child-support agency policy. Every row carries registry source IDs and direct source URLs in the CSV.
- We record the charge type separately. Interest, a statutory surcharge, and a late-payment penalty are not interchangeable.
- We classify legal scope before publishing a number: fixed, variable, judgment-dependent, discretionary, agency-specific, split, end-stage, no-current-interest, or unresolved.
- Calculation method includes its evidence status. “Inferred” is not presented as though a statute expressly said “simple” or “compound.”
- Missing evidence stays blank and the open fields remain public. A blank is never changed to zero to make a calculator run.
This release is one current-rule summary per jurisdiction. Where a state has multiple case scopes or historical effective periods, the row says so and does not claim to be an installment-level rate history. Those histories are required before any payoff-ledger tool can be considered.
Field dictionary
Method evidence
“Explicit” means the reviewed authority states the method. “Inferred” means the calculator implementation follows the source structure but the wording is not express.
Record status
Verified current rule, partial with named fields still open, or unresolved. It is an evidence label, not legal certification.
Historical rate required
True when an older installment can require a different rate or regime than the current snapshot. A current number alone cannot reconstruct that balance.
Version history and corrections
· version 2026-09-25.1
Rechecked five rows against primary sources. Nevada now shows its 8.75% statutory rate for 2026 (prime plus 2 under NRS 99.040) with simple interest from each due date, replacing an unresolved court-selected rate. South Carolina now cites Edwards v. Campbell for due-date accrual on child support. Kentucky is marked discretionary under Harney v. Harney (2024), with interest generally from each due date. Tennessee now describes the April 17, 2017 through June 30, 2018 window. Arkansas now explains that interest stops only on an advance written request and that the state collects it only after a judgment or certified calculation.
· version 2026-08-28.2
Added the narrowly scoped CC BY 4.0 reuse grant, machine-readable license metadata, and portable CSV attribution fields. The 51 jurisdiction records and their legal-rule content did not change in this version.
· version 2026-08-28.1
Initial public snapshot. Corrected Massachusetts to noncompounding principal interest; separated Tennessee’s IV-D and non-IV-D treatment; removed unsupported zero claims for Connecticut and Maryland; distinguished New Jersey’s satisfaction/execution timing; surfaced Wyoming’s separate late penalty; and documented Oregon, Pennsylvania, Washington, and New Hampshire scope corrections.
Found a source change or classification error? Email[email protected]with the jurisdiction, source URL, and the field you believe should change. Material changes are dated here and in the site update log.
Open data license
License and reuse
Abu Hasnat makes the following original compilation material available under the Creative Commons Attribution 4.0 International (CC BY 4.0): SupportDecode’s original selection, arrangement, classifications, and original descriptive text in this dataset. You may share and adapt those original compilation elements, including commercially, when you give appropriate credit, link to the license and this dataset where reasonably practicable, and indicate whether you made changes.
This license does not cover statutes, regulations, court opinions, agency documents, official source content or titles, trademarks, or other third-party material; those remain subject to their own legal status and terms. Reuse does not imply that Abu Hasnat, SupportDecode, a cited publisher, or a government agency endorses you or your use.
Suggested attribution
This is an example, not mandatory wording. A reasonable attribution can say:
SupportDecode Child-Support Arrears Interest Research Snapshot, version 2026-09-25.1, original compilation by Abu Hasnat, published by SupportDecode, https://supportdecode.com/research/child-support-arrears-interest-by-state/, licensed CC BY 4.0. Changes made: [describe changes]. Third-party official materials are excluded.
The dataset is provided as-is. The license applies only to rights the licensor is authorized to grant. The source documents linked in each row retain their own legal status and terms.
For researchers and libraries
Use the source-linked CSV
The export contains the same 51 structured records as this page, including blank rates, evidence labels, unresolved fields, citations, direct source URLs, and portable license and attribution metadata for the original compilation layer.
Download CSV dataFor parents and practitioners
Open the state-specific explanation
Start in the table, then open the linked state page for the calculator’s narrower inputs, assumptions, source list, and fail-closed limitations.
Browse state arrears calculatorsReviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log
Dataset checked . 21 jurisdiction summaries explicitly flag that historical periods can be required.