Personal

Child Maintenance Estimate Calculator

Simplified CMS-style payment from gross weekly income.

Use the interactive calculator below for an instant estimate. Results depend on your inputs and the assumptions shown on the page.

Methodology and source status

Scope: UK tax, pay, benefits, pension, and household-planning estimates.

Primary reference: GOV.UK benefits-calculator guidance.

Source record: Direct government source. This link is the calculator-specific evidence path, not a statement that every individual input or exception is current.

Effective period: Benefits depend on household, residence, savings, income, disability, study, care and other circumstances. Use an approved benefits calculator or adviser for an entitlement check.

Review status: Source path published; no named calculator-level review is currently represented here.

Last source or expert review: No calculator-level source or expert review date is published.

Technical validation: 12 August 2026 — catalogue build, route, metadata, and internal-link checks completed. This is a technical delivery check, not a review of current rates, rules, sources, calculations, or personal circumstances.

Next review trigger: Review when a relevant rate, threshold, provider fee, tax period, rule, or formula changes.