BeautyKiln gives general information, not legal, tax or financial advice. Talk to a qualified professional before making big decisions.

When You Can't Pay Your Tax Bill

Your tax bill is due and you don't have the money. It happens. Quiet months, unexpected costs, or just not putting enough aside. The worst thing you can do is ignore it. HMRC is far more reasonable than people expect, but only if you talk to them first.

File your return on time even if you can't pay. Late filing penalties are separate from late payment penalties, and you'll get hit with both if you do nothing.

Don't Panic, Don't Ignore It

HMRC deals with millions of people who can't pay on time. They have systems for this. What they don't tolerate is silence. If you ignore letters and phone calls, they escalate. If you pick up the phone and explain, they'll almost always work with you.

File on Time, Pay When You Can

The filing deadline and the payment deadline are the same date: 31 January. But the penalties are separate.

Late filing penalties:

• 1 day late: £100 flat penalty
• 3 months late: £10 per day, up to £900
• 6 months late: £300 or 5% of tax due (whichever is higher)
• 12 months late: another £300 or 5%

Late payment penalties are smaller (see below). So even if you can't pay a penny, file the return. You avoid the filing penalties and you know exactly what you owe.

HMRC Time to Pay

This is what most people use. Call HMRC on 0300 200 3835 before your payment deadline. Tell them you can't pay the full amount. They'll ask:

• How much you owe
• Why you can't pay
• How much you can afford per month
• When you could clear the balance

They'll usually agree a payment plan over 6-12 months. Interest is charged on the outstanding balance, but no late payment surcharges as long as you stick to the plan.

Key point: Call them before the deadline, not after. They're much more flexible when you're proactive.

Self-Serve Time to Pay Online

If your bill is up to £30,000 and you're within 60 days of the payment deadline, you can set up a payment plan online without calling anyone. Go to gov.uk and search "pay Self Assessment in instalments." You'll need your Government Gateway login.

You can spread payments over up to 12 months. You pick the day of the month for your direct debit. Interest is added automatically.

Tip for new starters: The online self-serve option is quick and avoids phone queues. It's available 24/7. If your bill is under £30,000, try this first.

Interest on Late Payment

HMRC charges interest on any tax paid late. The current rate is around 7.5% (2025-26). This is not a penalty. It's interest, and it runs from the day the payment was due until the day you pay. On a £3,000 bill paid 6 months late, that's roughly £112 in interest.

Penalty Structure for Late Payment

If you don't pay and don't set up a Time to Pay arrangement:

• 30 days late: 5% surcharge on the unpaid amount
• 6 months late: another 5% surcharge
• 12 months late: another 5% surcharge

On a £3,000 bill, that's £150 at 30 days, another £150 at 6 months, another £150 at 12 months. Plus interest on top. A £3,000 bill can become over £3,700 within a year if you do nothing.

What HMRC Can Do If You Ignore Them

If you don't pay, don't respond to letters, and don't answer calls, HMRC can:

1. Pass your debt to a collection agency. They're persistent.
2. Take money directly from your bank account (Direct Recovery of Debts, for debts over £1,000).
3. Register a County Court Judgment (CCJ) against you. This wrecks your credit score for six years.
4. Send enforcement agents (bailiffs) to your home or business premises.
5. Make you bankrupt - for larger debts, HMRC can petition for bankruptcy.

None of this happens overnight. HMRC sends multiple warnings first. But if you ignore everything, they will act.

Tip for new starters: HMRC's letters follow a pattern. Green envelope is routine. Brown is a reminder. A letter mentioning enforcement or legal action is serious. Never let it get to that stage.

Budgeting to Avoid This Next Year

The real fix is putting money aside every time you earn it.

• Open a separate savings account. Call it "tax."
• Transfer 25-30% of every payment you receive into it. That covers Income Tax and National Insurance.
• Don't touch it. Pretend it doesn't exist.
• When your tax bill arrives, the money is already there.

If you use the BeautyKiln Tax Set-Aside Calculator, it estimates exactly what percentage to save based on your expected annual income.

When to Get Professional Help

Get an accountant or tax adviser involved if:

• You owe more than one year's worth of tax
• The total debt is over £10,000
• HMRC has mentioned enforcement or legal action
• You're getting letters you don't understand
• You're too stressed to deal with it yourself

TaxAid offers free help to people on low incomes. Citizens Advice can help you understand your options.

Who to Contact

• HMRC Payment Support (Time to Pay): 0300 200 3835 (Free)
• HMRC Self Assessment helpline: 0300 200 3310 (Free)
• TaxAid - free tax advice for low-income earners: 0345 120 3779 (Free)
• Citizens Advice - debt and tax support: 0800 144 8848 (Free)
• StepChange - free debt advice: 0800 138 1111 (Free)
• Business Debtline - free advice for self-employed: 0800 197 6026 (Free)

Sources

• HMRC Time to Pay guidance (gov.uk/difficulties-paying-hmrc)
• HMRC late payment penalties (gov.uk/self-assessment-tax-returns/penalties)
• HMRC interest rates on late payments (gov.uk/government/publications/rates-and-allowances-hmrc-interest-rates-for-late-and-early-payments)

Related Guides

• Payments on Account Explained
• Tax-Saving Strategies
• Cash Flow Management for Irregular Income
• HMRC Investigations: What Triggers Them
• Getting and Working with an Accountant
• Setting Up Record-Keeping

Didn't find what you were looking for?