Cannot pay your Self Assessment bill? How HMRC payment plans work

Key Takeaways & Immediate Action Steps:

• Never ignore HMRC: Penalties and interest compound rapidly, and debt may be passed to debt collection agencies.
• Always file your tax return on time: Filing late triggers an automatic £100 fine even if you can't afford the tax bill itself.
• Online Self-Service Threshold: If you owe £30,000 or less for Self Assessment and are within 60 days of the payment deadline, you can usually set up a Direct Debit plan online without phoning HMRC.
• Pay what you can now: Any initial payment reduces the daily interest charged on the outstanding balance.

If you cannot pay your Self Assessment bill in full, do not solve the problem by ignoring HMRC. Work out the real amount due, pay what you reasonably can, and deal with the remaining balance through HMRC's payment-plan process if you need extra time.

HMRC refers to arrangements that give extra time to pay as Time to Pay.

What HMRC may ask for

To set up a payment plan, HMRC says you may need information including:

• the reference for the tax you cannot pay, such as your UTR;
• UK bank details if the arrangement will be collected by Direct Debit;
• details of your income and spending;
• for a company debt, details of the company's income and spending.

The point is affordability, not simply choosing a monthly amount that feels comfortable.

How monthly payments are assessed

HMRC's current guidance says the amount requested each month is based on what is left after reasonable living costs and fixed outgoings. It says taxpayers will usually be asked to put around half of the remaining disposable amount toward the tax debt.

There is no standard fixed duration for every payment plan. The period depends on the size of the debt and what can realistically be paid.

That does not make Time to Pay free finance. Interest can continue, and a longer repayment period normally means paying more overall.

Can you set up the plan online?

HMRC provides an online service that checks whether you can set up a payment plan without speaking to an adviser.

If the online route does not accept your circumstances, that does not automatically mean HMRC will refuse all arrangements. You may need to contact HMRC and give fuller information about your finances and the reason the debt arose.

If the bill is not overdue yet

There is a difference between:

• arranging time to pay an existing or overdue tax debt; and
• making regular payments in advance toward your next Self Assessment bill.

HMRC also has a Budget Payment Plan for some taxpayers who want to make weekly or monthly payments toward a future Self Assessment bill. That does not replace any remaining balance due at the normal payment deadline.

File the return even if you cannot pay

If your tax return is also outstanding, deal with that separately. Waiting to file because you cannot pay can add filing penalties to a payment problem.

A sensible sequence is often:

1. complete the missing return accurately;
2. establish the actual tax, payments on account, penalties and interest;
3. pay any amount you can pay immediately;
4. arrange how the balance will be cleared.

Why timing matters

HMRC has separate late-payment penalties and interest rules. Its internal guidance also recognises that an acceptable Time to Pay arrangement can affect late-payment penalties during the agreed period.

This is one reason to contact HMRC before a debt drifts into collection activity rather than waiting for enforcement letters.

If HMRC is already chasing the debt

HMRC says it can use debt collection agencies and enforcement powers where tax remains unpaid. If HMRC contacts you, respond rather than repeatedly postponing the conversation.

If the balance looks wrong, do not agree it merely to make the call end. Separate:

• the tax you accept is due;
• penalties or interest you think may be wrong;
• estimated amounts created because returns are missing;
• amounts you genuinely cannot currently pay.

What to gather before asking for help

For a useful review, have:

• the latest HMRC statement or debt letter;
• the tax years and tax types involved;
• any missing tax returns;
• payments already made;
• your rough monthly income and essential outgoings;
• other HMRC payment plans already in place;
• the amount you could realistically pay immediately and monthly.

The goal is not merely to obtain the smallest possible instalment. It is to get the underlying tax position correct and agree a repayment route you can actually maintain.