Changes of income and child maintenance

An income change does not necessarily alter child maintenance from the day a payslip changes. CMS distinguishes the income used in its calculation from current circumstances and applies rules about reassessment. ^[1]

Identify what actually changed

Separate a permanent salary reduction from an unpaid week, a delayed bonus or a move between employers. Record the effective date, expected duration and evidence, such as the employer's letter and recent payslips. Comparing a net bank receipt with a gross annual figure can create a misleading percentage difference.

For variable earnings, provide the relevant period rather than selecting the highest or lowest month. If employment has ended, record the last working day, final pay components and any new employment or benefits.

Ask about the effective date

Report the change through the appropriate CMS channel and retain confirmation. Ask whether more evidence is needed, when a revised decision would take effect and what to pay meanwhile. Do not replace an existing payment schedule with your own calculation.

Check the next decision against the information supplied. If the issue is an incorrect decision, use the reconsideration and appeal route; if it concerns business profits or diverted income, see self-employed income disputes. A private agreement needs its own review rather than assuming CMS has changed it automatically.

Compare the same kind of income over a meaningful period Start with the income figure shown in the CMS decision and establish whether it is gross income from HMRC information or a different figure accepted for the case. Then describe the new earnings on a comparable basis. Tax deductions, pension contributions, overtime and irregular bonuses can make take-home pay change without producing the same change in gross income. The calculation guidance explains that CMS normally obtains yearly gross income from HMRC and considers relevant adjustments. [1]

For a person paid irregularly, assemble enough records to show the pattern and explain any exceptional payment. A single high month may contain an annual bonus; a low month may reflect a payroll delay rather than a lasting reduction. State which explanation is supported by the documents and which remains uncertain. If income comes from several sources, identify the changed source without implying that the others have disappeared. This creates a clearer basis for the service to assess the actual circumstances.

Treat the reporting requirement as a separate question The current reporting guidance includes an income change of 25% or more and a situation where the paying parent no longer has income. It also lists other changes that may matter to the case. Check the official requirements and report through the recognised channel, retaining the date and confirmation. The presence of a percentage rule does not mean that every issue about employment, contact details, benefits or household circumstances can be reduced to one income comparison. [2]

When unsure whether an event must be reported, describe it accurately and ask CMS. A change of employer with similar earnings, for example, may raise different information needs from a permanent loss of work. State when the event occurred and when you learned of it. If reporting information about the other parent, distinguish confirmed facts from estimates and explain their source. Avoid presenting a social media observation as a verified salary figure or concealing uncertainty because a deadline feels pressing.

Explain the transition after employment ends Redundancy or dismissal can produce several dates and amounts: the last day worked, the employment end date, final salary, unused holiday pay and any termination payment. Keep the documents identifying each component rather than describing the whole final receipt as ordinary continuing earnings. Explain any new job, benefit claim or expected return to work. The service needs the sequence to assess the position under its rules; a personal budget shortfall alone does not determine the revised maintenance figure.

Ask what evidence remains outstanding and what payment obligation applies while the report is considered. If you cannot meet the current schedule, raise that practical difficulty promptly rather than silently stopping transfers. Maintain a record of payments and correspondence so the reassessment issue does not become confused with an unexplained arrears dispute. A reported change and an issued decision are different stages, and the date of a new job or lost salary should not be treated as a self-authorised adjustment to maintenance.

Read the revised decision against the report you made When a response arrives, compare the income figure, relevant period and effective date with the material submitted. Identify whether CMS has accepted the reported change, asked for more evidence or explained why the existing basis remains in use. Keep any annual review notice separately from a decision made following your report. This helps establish which decision is being questioned and whether the issue concerns new circumstances or an error in the service's assessment of information already available.

If something appears wrong, identify the precise discrepancy and use the decision's challenge information promptly. Sending a further payslip does not necessarily amount to requesting reconsideration of an earlier decision, and an unresolved query should not be assumed to preserve every deadline. For an informal maintenance arrangement, take the changed facts back to its own review process. A CMS decision in one context should not be described as automatically rewriting every private commitment or separate court provision connected with the child.