A self assessment payment plan lets you pay an overdue tax bill to HMRC in monthly instalments instead of all at once. It’s officially called a Time to Pay arrangement, and if you meet HMRC’s criteria, you can check your eligibility and set one up online in minutes.
You can usually apply online if you’ve filed your latest return, owe £30,000 or less, are within 60 days of the payment deadline, and don’t already have another payment plan or debt with HMRC. If you don’t meet those conditions, you can still arrange a plan by contacting HMRC directly.
It’s worth being clear about what this is not. A Time to Pay arrangement deals with tax you already owe and can’t pay. It’s different from a Budget Payment Plan, which lets you save toward a future bill before it’s due, and different again from Payments on Account, which are advance instalments HMRC asks for automatically. Confusing the three is one of the most common reasons people end up on the wrong page or apply for the wrong thing.
This guide walks through exactly who qualifies, how to set a plan up step by step, what it will actually cost you in interest and penalties, and what happens if HMRC turns down your application or you miss a payment along the way.
What Is a Self Assessment Payment Plan?
A self assessment payment plan is an arrangement whereby an eligible taxpayer pays his/her outstanding tax debt in instalments with HMRC.
If you’re searching for the right HMRC Self Assessment payment plan, you’re usually looking for a way to spread an existing tax bill because you can’t afford to pay the full amount by the deadline.
HMRC refers to this type of arrangement as a Time to Pay arrangement. Its current guidance says you may be able to set up a payment plan for an overdue tax bill and make monthly instalment payments.
It is important to distinguish this from two other types of payment people often confuse it with:
- Time to Pay arrangement: used when you have an existing tax debt that you cannot pay in full.
- Budget Payment Plan: Voluntary weekly or monthly payments toward your next Self Assessment bill, before it’s even due, paused or cancelled any time
- Payments on Account: Advance payments HMRC requires toward your next bill, due 31 January and 31 July, calculated from your last return
Real-world example: James, who runs a small coffee shop in Manchester, filed his return on a Sunday evening and found the bill bigger than his available cash. He wasn’t refusing to pay, he simply couldn’t pay it all at once, which is exactly the situation a Time to Pay arrangement is designed for.
That distinction matters, because applying for the wrong type of Self Assessment payment plan can cost you time you don’t have. It matters because the right option depends on whether you’re preparing for a future bill or already have one you cannot pay.
Do You Qualify to Set One Up Online?
If you are eager to know whether you could simply choose a monthly amount and start paying.
The answer depends on your circumstances.
HMRC provides an online service that checks whether you are eligible for a payment plan and allows eligible taxpayers to set one up online. It is possible to arrange a Self Assessment payment plan within 60 days of a payment due date, if you:
- Have filed your latest tax return
- Owe £30,000 or less
- Do not have any other payment plans or debts with HMRC
- You intend to pay your debt back in the coming 12 months
The online route is subject to eligibility conditions, including the amount owed and your tax position.
Before starting, have the following information available:
- Your Self Assessment details or Unique Taxpayer Reference
- Your bank account information
- Details of your income
- Your regular household and personal spending
- Information about savings or investments, if required
- Details of other tax debts
If you cannot use the online service, that does not necessarily mean you have no payment-plan options. You may need to contact HMRC directly and discuss your circumstances.
How to Set Up a Self Assessment Payment Plan
It is necessary to understand that ignoring the bill would not make it disappear.
Start with the basics.
1. File your Self Assessment return
First, make sure your tax return has been submitted and you know exactly how much you owe.
Don’t delay filing simply because you cannot afford the resulting bill. Filing and paying are separate responsibilities.
2. Check your HMRC account
Sign in through the official GOV.UK service and check your current Self Assessment balance.
Use GOV.UK rather than following unexpected links in emails or text messages claiming to be from HMRC.
3. Check your payment-plan eligibility
HMRC’s online service allows you to check whether you can set up a payment plan. If you’re eligible, you can proceed with the arrangement online.
4. Provide accurate financial information
If HMRC asks about your finances, use realistic figures.
Look at your recent bank statements, household bills and income records rather than guessing.
5. Set up your payments
Where an arrangement is agreed, you will need the appropriate UK bank account details and authority to set up a Direct Debit.
6. Keep your confirmation
Save the details of the agreement and note the payment dates.
The biggest mistake is treating an agreed plan as something you can worry about later. Once you’ve agreed to the payment plan HMRC Self Assessment arrangement, you need to keep up with it.
How Much Can You Actually Afford? The 50% Disposable Income Rule
This is where you need to look beyond your bank balance.
HMRC considers what you can realistically afford after essential expenditure. Its guidance says it will usually ask for around half of your disposable income towards the debt, although you may agree to pay more.
Imagine you have:
| Monthly finances | Amount |
|---|---|
| Net income | £3,500 |
| Rent/mortgage | £1,200 |
| Household bills | £500 |
| Food | £400 |
| Travel and essentials | £300 |
| Disposable income | £1,100 |
Using the usual approach, around half of that £1,100 could mean approximately £550 a month towards the tax debt.
The £550 figure is an illustration, not a guaranteed HMRC calculation. Your actual payment depends on your circumstances and the arrangement HMRC agrees with you.
The lesson is simple: don’t agree to an instalment that looks affordable today but leaves you unable to pay essential bills next month.
What a Plan Actually Costs You
Are you wondering: would spreading the payments cost you more?
Yes. HMRC currently charges late payment interest at 7.75% a year (base rate plus 4%, effective from 9 January 2026), and this rate moves when the Bank of England base rate changes. Separately, late payment penalties of 5% of the unpaid tax apply at 30 days, 6 months, and 12 months if the bill still isn’t settled, on top of the interest.
So a payment plan for Self Assessment tax is not a way to avoid the cost of paying late. It is a way to manage the cash flow when paying the full amount immediately isn’t realistic.
If you can afford to clear the balance sooner than the agreed schedule, doing so may reduce the period over which interest accumulates.
What Happens If HMRC Says No?
Not everyone will qualify for the online HMRC payment plan.
If the online service does not allow you to set up an arrangement, don’t simply stop there.
Contact HMRC and be ready to explain:
- Your monthly income
- Your essential expenditure
- Your savings and investments
- Other debts
- Other tax liabilities
- How much you can pay immediately
- How much you can afford each month
HMRC can then consider whether a Time to Pay arrangement is appropriate.
However, professional advice on accounts and/or tax may also be available if your finances are complex to better understand your position before contacting HMRC.
What Happens If You Miss a Payment?
A payment plan only works if you maintain the agreed payments.
If you miss one, do not wait till the situation gets out of hand.
If you do not pay, HMRC will inform you of the missed payment and where practicable, may attempt to reschedule or renegotiate the payment.
If your circumstances have changed because you’ve lost income, faced unexpected expenses or experienced another financial problem, tell HMRC as soon as possible.
The worst option is usually silence.
Don’t Let a Tax Bill You Can’t Pay Turn Into Penalties
MyIVA’s team can check your eligibility for a Self Assessment Payment Plan, work out an instalment amount you can actually maintain, and deal with HMRC on your behalf.
FAQs: Frequently Asked Questions
Can you set up a payment plan after the 31 January deadline has passed?
Yes, potentially. Missing the Self Assessment deadline does not automatically prevent you from applying for a payment plan. There is an online service provided by HMRC to assess eligibility. Late payment penalties and interest may also apply – so it is crucial to get it done quickly.
Does a payment plan affect your credit score?
A standard HMRC payment arrangement is not the same as taking out a conventional personal loan. However, unpaid tax can lead to collection or enforcement action, which can create wider financial consequences. If you’re concerned about your credit position, seek advice based on your circumstances.
Can HMRC refuse your payment plan request?
Yes. A payment plan is not automatically available to everyone. HMRC considers eligibility and affordability. If the online service doesn’t accept your request, contact HMRC to discuss your options.
What if your financial situation changes partway through the plan?
Contact HMRC immediately. Its guidance says you should get in touch if your circumstances change, as your payment arrangement may need to be reviewed.
Is a payment plan the same as Payments on Account?
No. Payments on Account are advance payments towards your next Self Assessment bill and are normally due on 31 January and 31 July.
A Time to Pay arrangement deals with an existing tax debt.
A Budget Payment Plan allows eligible taxpayers to make regular payments towards a future bill.
Does a Time to Pay arrangement affect my Payments on Account?
No, they’re separate. A Time to Pay arrangement covers tax you already owe, while Payments on Account are advance instalments toward your next bill. You can be on both at once, and HMRC will treat them as separate obligations with separate schedules.
Conclusion
If you cannot pay your Self Assessment tax bill in full, don’t ignore it. Check HMRC’s online payment-plan service, understand what you can genuinely afford and contact HMRC promptly if you cannot arrange the plan online.
A self assessment payment plan can turn your problem of immediate cash-flow into a manageable series of payments, but it still comes with responsibilities and potentially additional interest.
If you’re facing a tax bill you cannot comfortably pay, take action before the problem grows. Check your available options, prepare your figures and get professional tax advice if your situation is complex.
A tax bill can be difficult to manage. But with the right information and an arrangement you can actually maintain, it doesn’t have to become an unmanaged financial crisis.
Not Sure Where You Stand With HMRC?
MyIVA can review your Self Assessment position, work out what you can realistically afford, and help you set up the right payment plan before penalties and interest start adding up.
