How to Set Up a Payment Plan with HMRC: A Step-by-Step Guide for 2025/26

For many UK taxpayers—especially self-employed individuals, landlords, or small business owners—there are times when paying the full Self Assessment tax bill by the 31 January deadline can be challenging. The good news is that HM Revenue & Customs (HMRC) allows you to set up a Time to Pay arrangement (payment plan) to spread the cost over manageable monthly instalments.

At Mayfair Tax Advisors, we frequently assist clients in negotiating affordable HMRC payment plans, ensuring compliance while easing financial pressure. Whether you owe £500 or £50,000, knowing how and when to approach HMRC strategically can make all the difference between smooth cash flow management and costly penalties.

This guide walks you through eligibility, the process for setting up an instalment plan online or by phone, what HMRC considers “reasonable,” and how to manage your agreement once it’s active.

Who Can Set Up a Payment Plan with HMRC?

You can usually arrange a Time to Pay agreement if you:

Owe less than £30,000 in total tax, including interest and penalties.
Have no other payment plans or debts with HMRC.
Are up to date with all tax filings (submitted returns).
Can pay the full amount within 12 months (or sooner) through instalments.

If your debt exceeds £30,000 or requires more time, you can still apply, but HMRC will conduct a full financial review—often requiring documentation of income, expenses, and assets.

For full eligibility, see: GOV.UK: Set up a Self Assessment payment plan.

Why Consider a Payment Plan?

Avoid Penalties: Setting up an arrangement before the deadline reduces late payment charges.
Protect Cash Flow: Spread payments and keep funds available for business expenses.
Prevent Debt Collection: Proactive contact avoids enforcement action like bailiff involvement.
Maintain Good Standing: HMRC prefers cooperation—showing willingness to pay helps future negotiations.

Key Deadlines to Remember

31 January 2026 – Deadline to file your 2024/25 Self Assessment tax return and pay any tax due.
If you can’t pay by this date, set up a payment plan as soon as possible to avoid daily interest.
Plans arranged within 60 days of the due date usually prevent late payment penalties.

Interest still applies (currently around 7.75% annualized), but avoiding additional surcharges makes early communication worthwhile.

What You Need Before You Start

Gather the following before applying for a Time to Pay plan:

Your 10-digit UTR (Unique Taxpayer Reference).
Access to your Government Gateway account.
Your most recent tax return and HMRC correspondence.
Details of income, outgoings, savings, or other debts.
Bank details for setting up Direct Debit payments.
A clear idea of how much you can afford monthly.

If you’re represented by an accountant, they can assist with the negotiation and numbers.

Step-by-Step Guide to Setting Up an HMRC Payment Plan

There are two main routes: online (instant setup for most taxpayers) or by phone (for complex or high-value cases).

Method 1: Online Payment Plan (Simplest & Fastest)

Step 1: Log in to Your Government Gateway Account
Go to GOV.UK: Pay your Self Assessment tax bill and click “Set up a payment plan.”
Step 2: Check if You’re Eligible Online
HMRC’s system checks your tax debt, return status, and filing history. If you qualify, it continues automatically.
Step 3: Enter Payment Details
Input:
- Total amount owed (HMRC fills automatically if linked to your return).
- The down payment (if any) you can make now.
- How many months you need to repay (up to 12).
The system will calculate equal monthly instalments and show total interest.
Step 4: Set Up a Direct Debit
Provide your bank details to authorize monthly collections. You’ll receive immediate on-screen confirmation and a follow-up email summarizing your plan.
Step 5: Keep to Your Schedule
Payments are withdrawn automatically each month. You can view or update the plan anytime through your online account.

Method 2: Requesting a Payment Plan by Phone (For Complex Cases)

If you owe more than £30,000, have multiple debts, or need more than 12 months, you’ll need to call HMRC.

Step 1: Call the Self Assessment Payment Helpline
Phone: 0300 200 3822
Hours: Monday to Friday, 8am – 6pm
Step 2: Explain Your Situation Clearly
An HMRC officer will ask:
- Why you can’t pay in full.
- What efforts you’ve made to raise funds.
- Your income, essential expenses, and assets.
Be honest and prepared with figures. HMRC may ask for supporting documents.
Step 3: Agree on an Affordable Proposal
HMRC will assess what’s “reasonable” based on your disposable income and assets. If approved, they’ll issue written confirmation of the instalment plan and payment dates.

Managing Your Agreement After It Starts

Once your Time to Pay is active:

Make all payments on time. Missing one instalment risks plan cancellation.
Stay up to date with future tax returns. HMRC can withdraw arrangements if you fall behind.
Inform HMRC early if circumstances change. They may adjust your schedule if you experience hardship.
Keep records of every HMRC letter, confirmation, and payment.

If you default, HMRC may charge additional penalties or initiate collection actions, so proactive communication is key.

Strategic Tips from Mayfair Tax Advisors

Apply early—waiting until HMRC contacts you limits flexibility.
Offer realistic repayments—proposing too much can lead to default and enforcement.
Show willingness—a small upfront payment often strengthens your case.
Budget for future tax years—use your payment plan as a bridge, not a permanent habit.
Seek professional help—for high tax liabilities, having an advisor negotiate can yield more favorable terms.

At Mayfair Tax Advisors, we model affordability, negotiate directly with HMRC, and ensure your Time to Pay plan aligns with your long-term business goals.

Common Misunderstandings

A Time to Pay plan does not pause interest—it prevents penalties but interest still accrues.
Extensions beyond 12 months are possible only after financial review.
Ignoring HMRC or missing deadlines reduces available options.
Plans are flexible but require complete transparency—hidden income or assets can void arrangements.

Useful GOV.UK Resources

Need Help Agreeing a Payment Plan?

If you’re unsure how much you can commit to or your situation involves multiple income streams, our team at Mayfair Tax Advisors can help. We assess your financial position, liaise with HMRC on your behalf, and secure a practical, compliant agreement that protects your future.

Email [email protected] or visit our website’s contact form to schedule a consultation today.