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Calculator · NRS 125B.140 / 99.040

Arrears judgment schedule

Enter the support order, any modifications, and every payment actually made. Get a judgment-ready schedule: each installment’s shortfall, statutory simple interest from its due date (prime + 2%, reset each January and July), and the pre-2020 delinquency penalty where it still applies - every figure cited. All math runs in your browser; nothing you enter is sent to a server.

Order & modifications
Payments made
Calculate as of
Support ends (optional)
How are payments applied?
Penalty accrual method
Calculation profile

Common questions

Arrears judgments, answered

How are Nevada child support arrears calculated?
Each unpaid installment is a judgment by operation of law on the date it fell due (NRS 125B.140(1)(a)), and interest runs on each installment at the NRS 99.040 rate - prime plus 2%, reset every January 1 and July 1 - from the time each amount became due (NRS 125B.140(2)(c)(1)). The interest is simple, never compound (Torres v. Goodyear, 130 Nev. 22 (2014)).
How are partial payments applied to arrears in Nevada?
Absent a specific designation, Nevada applies partial payments to the oldest portion of the debt first (Foster v. Marshman, 96 Nev. 475 (1980), following Biel v. Godwin, 69 Nev. 189 (1952)). The statutes do not expressly say whether a payment retires principal or accrued interest first; this calculator shows both readings and lets you elect one knowingly.
Does the 10% child support penalty still apply in Nevada?
Only historically. Former NRS 125B.095 added 10% per year (or portion of a year) to each installment delinquent by a month's support. It was repealed by AB 278 (2017), effective February 1, 2020, with the new NAC 425 guidelines. Penalties that accrued before that date remain due; nothing accrues on or after it.
Can old child support arrears still be collected in Nevada?
Generally yes. If a court issued the support order, there is no limitation on the time to commence an action to collect - a motion or independent action to enforce a judgment for support may be commenced at any time (NRS 125B.050(2)-(3)). Interest keeps accruing on each unpaid installment until it is paid. Very old installments can raise transition-law questions; ask a Nevada attorney.
Can a Nevada court retroactively reduce support arrears?
No. Once an installment accrues it is a judgment and may not be retroactively modified or adjusted (NRS 125B.140(1)(a)). A modification only affects installments that come due after notice of the motion (NRS 125B.140(1)(b)).

Informational only, not legal advice. Consult a licensed Nevada attorney. Authorities: NRS 125B.140; NRS 99.040; NRS 17.130; former NRS 125B.095 (repealed eff. Feb. 1, 2020); Torres v. Goodyear, 130 Nev. 22 (2014); Foster v. Marshman, 96 Nev. 475 (1980); Biel v. Godwin, 69 Nev. 189 (1952); Campbell v. Lake Terrace, 111 Nev. 1329 (1995).