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Reviewed for current 2026 law

New Mexico Child Support Arrears Calculator

Apply the statutory judgment rate from delinquency.

Reviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log

arrears calculator

Arrears owed

The unpaid support amount itself, before any interest.

Accrual period
How do you want to enter the period?

Estimated arrears with interest: $5,004.37

Interest of $4.37 at 0.0875% simple per year (NMSA 1978, §§ 40-4-7.3 and 56-8-4).

How this estimate was computed
Line itemAmount
Arrears principalNMSA 1978, § 40-4-7.3 — interest on delinquent support (New Mexico Legislature)$5,000.00
Simple interest at 0.0875% per year for 12 month(s) (NMSA 1978, §§ 40-4-7.3 and 56-8-4)Interest accrues on delinquent child and spousal support at the 8.75% judgment rate in effect when the payment becomes due, from delinquency until paid or consolidated.NMSA 1978, § 40-4-7.3 — interest on delinquent support (New Mexico Legislature)$4.37
Arrears principal plus interestNMSA 1978, § 40-4-7.3 — interest on delinquent support (New Mexico Legislature)$5,004.37

Assumptions

  • Accrual period expressed as 12 month(s); partial months prorate.

Estimate only. The court or state agency calculation controls.

New Mexico arrears interest under NMSA 1978, §§ 40-4-7.3 and 56-8-4; rules last reviewed 2026-08-09.

Delinquent support accrues 8.75% interest

Section 40-4-7.3 applies the §56-8-4 rate in effect when each payment became due.

Payments apply first to current support, then delinquent support and consolidated principal, then interest.

Rate
8.75% annuallysource
Start
Date of delinquencysource
Method
Simple projectionsource

Reconcile by installment

A real ledger needs every due date, payment, and consolidation event.

What this estimate includes

  • Simple 8.75% projection

What it leaves out

  • Dated ledger
  • Payment allocation
  • Consolidation events

New Mexico arrears calculator FAQs

When does interest start?

When each support payment becomes delinquent.

What rate applies?

The §56-8-4 rate in effect when that payment became due.

What is the current statutory rate?

8.75%.

What gets paid first?

Current support, then principal categories, then accrued interest.

Does this replace the official ledger?

No.

Does spousal support accrue too?

The statute addresses delinquent child and spousal support.

Official sources

Official sources last verified: .

Changelog: page reviewed . Material changes appear in the update log.