Deep dive · Updated 07/07/2026

CMS enforcement powers — and the limits on each one

The CMS has some of the strongest civil enforcement powers of any UK agency, most exercisable without going to court first. Each power comes with statutory safeguards and rights of challenge. Knowing both halves matters: if you owe the money, expect these tools; if the debt is wrong, the time to fight is the underlying decision — ideally before enforcement bites.

Administrative powers (no court needed)

Deduction from earnings order (DEO)

Instructs your employer to deduct maintenance and arrears from wages. Safeguard: the protected earnings proportion — 60% of net earnings must be left after the deduction. Challenge: apply to the CMS for review if the figures are wrong (and check your payslips actually respect the 60% floor); the order itself can be appealed to the magistrates' court (sheriff in Scotland) on the ground that the payments are not "due" or the order is defective. Employers who fail to operate a DEO commit an offence.

Regular deduction order (RDO)

Takes regular amounts directly from a bank or building society account — including, since 2018, sole trader and certain business and joint accounts. Safeguards: you must be left with a minimum amount; representations can be made before a joint-account order; a £50 charge applies. Challenge: representations to the CMS, then appeal to the family court within 21 days.

Lump sum deduction order (LSDO)

Freezes and then removes a one-off sum from an account to clear arrears. Two-stage process: an interim order freezes the funds and gives you a window (14 days) to make representations before the final order takes the money. A £200 charge applies. Challenge: representations, then appeal to the family court within 21 days of the final order.

Court-based powers

Liability order

The gateway to the heavier tools: the CMS applies to the magistrates' court (sheriff in Scotland) for an order confirming the debt. The court cannot question the maintenance calculation itself — only whether the amounts have become payable and not paid, which is why disputing the calculation has to happen through MR and appeal, not at the liability order hearing. A £300 charge is added.

After a liability order

For the driving, passport and prison powers the court must find that non-payment resulted from wilful refusal or culpable neglect — inability to pay is a defence, and you are entitled to put full means evidence before the court. These hearings are one of the few points in the system where legal representation is strongly worth considering; legal aid may be available where imprisonment is in prospect.

If you genuinely cannot pay

Contact the CMS before missing a payment, not after: propose a realistic schedule in writing, evidence your means, and keep paying something. "Wilful refusal" findings are built on silence and broken promises, not on documented hardship engaged with early. Free debt advice (StepChange, National Debtline, Citizens Advice) strengthens both your plan and its credibility. And if the arrears are inflated by decisions that were wrong, run the self-assessment and challenge them now — enforcement does not pause for you.