Owe HMRC money? HMRC debt help and Time to Pay explained

What happens when you owe HMRC

Unpaid PAYE, VAT or Corporation Tax doesn't sit quietly on HMRC's books — it starts accruing interest from the day it becomes overdue, and late-payment penalties follow on top of that. HMRC's guidance on late payment penalties for PAYE and National Insurance confirms penalties escalate the more times you're late paying within a tax year, and further penalties can apply the longer a debt goes unpaid. If the arrears are ignored, HMRC can escalate: passing the debt to a debt collection agency, sending officers to take control of goods, and, as HMRC itself describes it, using insolvency action such as a winding-up petition as a final course of action. Directors can also face personal exposure where PAYE and National Insurance deductions were withheld from staff pay but never passed on, since that money was never really the company's to keep. None of this happens overnight — HMRC's guidance on what will happen if you don't pay your tax bill makes clear enforcement is a graduated process — but it does happen, reliably, to businesses that don't pick up the phone.

Beyond the headline penalties, there's a slower cost: the drag on everything else you're trying to do. A business with an open HMRC debt spends management time firefighting letters instead of running the business, and lenders or landlords will ask about it during due diligence. Arrears compound the longer they sit — financially through interest, and reputationally through the trail HMRC keeps on file. That trail matters later: a business that's been silent for months starts from a weaker position than one that flagged the problem early.

What is a Time to Pay arrangement?

A Time to Pay (TTP) arrangement is a formal agreement with HMRC to clear what you owe through a series of instalments rather than in one lump sum. GOV.UK's guidance on difficulties paying HMRC sets out the general approach: contact HMRC before or as soon as possible after the payment deadline, be ready to explain why you can't pay in full, and come prepared with a clear view of what you can realistically afford each month. HMRC doesn't publish a single fixed term for these arrangements — each one is assessed on affordability rather than a standard timetable — but in practice, plans covering viable small and medium businesses commonly run 6 to 12 months, with longer terms agreed where the numbers clearly support it. Interest continues to accrue on the outstanding balance for the life of the arrangement, charged at the Bank of England base rate plus 4% per HMRC's guidance on interest for late payment of PAYE and CIS — a rate that moves with the base rate, so check the current figure before committing to a plan. What you get in return is real: enforcement stops while you keep to the agreed schedule, and further late-payment penalties are usually avoided on the debt covered by the arrangement.

HMRC agrees to TTP when it believes the business is viable and the offer put in front of it is realistic. That means presenting your numbers properly: exactly what you owe, broken down by tax and period; what you can genuinely afford monthly without starving the business of cash; and a credible explanation of why the shortfall happened, whether that's a late-paying customer, a one-off cost spike, or a payroll error that inflated the liability. A proposal backed by management accounts and a cash flow forecast gets a very different reception than a bare request to "pay less."

Why early, professional contact matters

HMRC responds very differently to a business that approaches it with a credible plan than to one it has been chasing for months through automated letters and escalating calls. Getting the proposal right the first time matters more than most business owners expect: a rejected or unrealistic offer doesn't just get you a "no" — it makes the next conversation harder, because HMRC's caseworker now has a paper trail showing a plan that wasn't kept to or wasn't credible from the start. Businesses that call HMRC's Payment Support Service themselves, without preparation, often either overcommit to instalments they can't sustain — which then default and leave them worse off than before — or undercommit and get turned down, burning the goodwill of a first approach. This is exactly where representation earns its keep, and it's why we build it into how we support clients rather than leaving them to negotiate alone:

• We speak to HMRC on your behalf — the calls, the letters, the deadlines.
• We prepare the financial information HMRC expects, in the format it expects.
• We negotiate instalments your cash flow can actually sustain.
• We fix the payroll going forward, so the same debt doesn't rebuild.

Reduce the bill as well as spreading it

Spreading the debt over instalments is only half the job — the other half, which most businesses skip, is checking whether the debt is actually correct. Payroll errors inflate PAYE and NIC liabilities more often than owners realise: unclaimed Employment Allowance can leave a business paying employer's National Insurance it was never liable for, employees on the wrong NI category generate incorrect employer contributions, and basic processing mistakes — a leaver not marked as left, a benefit misreported, a director's NI miscalculated — add pounds HMRC has no reason to know are wrong unless someone corrects them. A proper payroll review carried out before you discuss instalments often reduces the underlying liability itself, changing both the size of the debt and the monthly figure HMRC is asked to accept. Negotiating hard on a number that's wrong to begin with is wasted effort; get the figure right first, then negotiate what's actually owed.

A worked example — what a Time to Pay proposal looks like in numbers

Consider a small business with eight employees that misses three consecutive monthly PAYE and employer's National Insurance payments, building up arrears of £9,600. As its first defaults of the tax year, HMRC's published penalty structure for late-paid PAYE puts it in the 1% band (1% of the amount paid late for one to three defaults, rising to 2%, 3% and 4% as defaults increase), with a further 5% added to any amount still unpaid at 6 months, and another 5% at 12 months. Interest also accrues on the £9,600 throughout, at the Bank of England base rate plus 4% under HMRC's guidance on interest for PAYE and CIS. Rather than wait, the business contacts HMRC before the six-month mark, sets out management accounts showing it can sustainably commit £1,200 a month, and proposes clearing the £9,600 over 8 months. HMRC accepts: three years of trading history, a credible one-off cause (a delayed payment from a major customer), and a monthly figure that's affordable rather than aspirational. Enforcement stops immediately, interest now accrues only on the reducing balance, and by acting ahead of the six-month point the business avoids the additional 5% penalty. This is a hypothetical scenario; your own figures will differ.

Common mistakes businesses make with HMRC debt

Most businesses that end up in serious difficulty with HMRC didn't get there through one big error — they got there through a handful of small, avoidable ones that compound over a few months. The pattern is consistent: contact is avoided rather than made, a payment figure is proposed without checking whether the underlying tax bill is even correct, and the payroll problem that caused the shortfall is never actually fixed, so the same debt starts rebuilding almost as soon as the first arrangement is agreed. None of these mistakes are complicated to avoid once you know to look for them, but they're easy to fall into when you're dealing with HMRC for the first time, under pressure, without anyone checking the numbers or the strategy behind them. The list below covers the ones we see most often, roughly in the order they tend to do the most damage.

• Going quiet. Ignoring letters and calls is the single biggest driver of escalation — HMRC moves fastest against businesses it can't reach.
• Offering a number you can't sustain. A plan that defaults after two months leaves you worse off, since HMRC has evidence the business couldn't keep a promise it made itself.
• Negotiating on a liability you haven't checked. PAYE or NIC figures are often inflated by unclaimed Employment Allowance, wrong NI categories, or processing errors — money that never needed to be part of the negotiation.
• Waiting until the debt is large before asking for help. The earlier you approach HMRC relative to the deadline, the more flexibility there tends to be.
• Treating Time to Pay as a one-off fix rather than correcting the payroll process that created the shortfall, so the debt quietly rebuilds.
• Assuming a director can't be personally affected. Where PAYE and NIC deductions were withheld from staff pay and not passed on, directors can face personal exposure.

Edge cases worth knowing

Two situations catch businesses out more often than the standard scenario above. The first is a business that has already defaulted on a previous Time to Pay arrangement — HMRC will still consider a new proposal, but the bar is higher: it will want a stronger explanation of what's changed and firmer evidence the new figure is affordable, since the earlier default is now part of the compliance history HMRC weighs. The second is a business with debt across more than one tax head at once — say, PAYE arrears alongside an overdue VAT return or Corporation Tax bill — where it's more effective to bring HMRC one combined picture of total liabilities and affordable repayment capacity than to negotiate each separately, since uncoordinated proposals for the same limited cash flow tend to undermine each other's credibility. In both cases, the financial case you present matters even more than in a straightforward first-time approach.

Will HMRC agree to a payment plan for my business?

Usually yes, if the business is viable and the proposal is realistic. HMRC agrees a very large number of Time to Pay arrangements every year, and its own guidance on difficulties paying HMRC is built around the assumption that most businesses in genuine short-term difficulty should be able to reach agreement — presentation and early contact make the difference.

How long can a Time to Pay arrangement last?

HMRC doesn't publish a fixed term — each arrangement is assessed on what the business can genuinely afford. In practice, most run 6–12 months, though longer terms are agreed where the numbers support it. The plan needs to be affordable from the outset: defaulting partway through is worse than asking for longer in the first proposal.

Can someone deal with HMRC on my behalf?

Yes — you can authorise an agent to speak to HMRC for you. We handle the contact, the paperwork and the negotiation, and because we also run the payroll itself, we can identify and correct the errors that caused the debt at the same time.

Does interest keep building while I'm on a Time to Pay plan?

Yes. HMRC's guidance on interest for late payment of PAYE and CIS confirms interest continues to accrue on the outstanding balance while it remains unpaid, calculated at the Bank of England base rate plus 4%. Time to Pay stops enforcement and further late-payment penalties on the covered debt, but it isn't interest-free — factor that into the total cost.