NM Family LawUpdated for 2026 Guidelines

New Mexico Parenting Time & Custody Overnight Calculator

Calculate custody overnights, determine annual percentage split, and verify statutory qualification for child support reductions under N.M. Stat. Ann. § 40-4-11.1(F).

Direct Answer · Custody Statutory Rule (2026)

In New Mexico: Parenting time directly reduces child support obligations when a non-custodial parent reaches 128 overnights per year (35% timeshare) under N.M. Stat. Ann. § 40-4-11.1(F). The court calculates relief using the worksheet b (shared physical responsibility, cross-credit). Standard rotational schedules such as 2-2-3 (182 nights) qualify for full shared-custody adjustments.

Statutory Citation: N.M. Stat. Ann. § 40-4-11.1(F)Judicial Authority: New Mexico Family Court GuidelinesLast Verified: October 2026

Parenting Time & Custody Overnight Calculator

Calculate annual overnights, time-sharing percentage, and state child support adjustment qualification.

Jurisdiction / State:

1. Select Parenting Schedule Pattern:

2 nights every other weekend across 26 fortnights = 52 overnights/yr (14.2%).

Summer Extra Nights:Additional summer block

Holiday Extra Nights:Thanksgiving / Winter break

Annual Time-Sharing Breakdown

Parent A (Non-Custodial)

52 nights

14.2%

Parent B (Primary)

313 nights

85.8%

Parent A: 14.2%Parent B: 85.8%

⚠️New Mexico Statutory Threshold: 128 Nights (35%)

Below Threshold. Current schedule provides 52 overnights, which is 76 nights short of the 128-night threshold for New Mexico. Standard sole custody support applies without automatic time-sharing discount.

Statutory Legal Reference: N.M. Stat. Ann. § 40-4-11.1(F) — Worksheet B (Shared Physical Responsibility, Cross-Credit). In New Mexico, overnights are counted under the following rule: Under N.M. Stat. § 40-4-11.1, shared responsibility occurs when each parent has the child for at least 35% of the year (128 overnights).

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New Mexico Legal Guidelines on Custody Overnights

Statutory Threshold

128 Overnights

Equal to 35% of annual parenting time

Legal Methodology

Worksheet B (Shared Physical Responsibility, Cross-Credit)

Governed by N.M. Stat. Ann. § 40-4-11.1(F)

Official Overnight Counting Rule in New Mexico

Under N.M. Stat. § 40-4-11.1, shared responsibility occurs when each parent has the child for at least 35% of the year (128 overnights).

Standard Default Possession Schedule

Alternating weekends, alternating holidays, and extended summer weeks (~85–95 overnights).

Court Evidence & Verification Checklist for New Mexico

If you are requesting or defending against a child support reduction in New Mexico family court based on shared physical care, prepare the following evidence:

Maintain an annual custody calendar.
Preserve daycare and school pickup sign-in records.
Save receipts for extracurricular equipment and fees.

New Mexico Custody Overnights FAQ

When does New Mexico Worksheet B apply?

Worksheet B applies when both parents exercise physical responsibility for at least 35% of the year (128 overnights).

How does New Mexico calculate 50/50 child support?

Basic support is multiplied by 1.5, each parent's proportional share is calculated based on income, and the obligation is offset based on time spent.

Data sources & methodology

New Mexico Statutory AuthorityN.M. Stat. Ann. § 40-4-11.1(F) — Official state guideline schedule and parenting time rules.
NCSL Custody GuidelinesNational Conference of State Legislatures — Shared Physical Custody and Parenting Time Models.
New Mexico Family Court RulesLocal standard possession schedules, overnight definitions, and administrative calculation forms.

Methodology and citations are maintained by the ChildSupportFig editorial team. Where an official guideline schedule is not yet loaded, results are shown as model estimates and the source is stated as a reference schedule.

Not legal or financial advice. Child support is determined by a court based on your state’s official worksheet. Online estimators provide an informal planning figure only. Laws change — always confirm the current guideline with your state child support agency or a licensed family law attorney in your state before relying on any number.