PAYE late payment penalties are charged by HMRC when an employer pays PAYE tax and National Insurance after the due date, with the percentage rising each time it happens again in the same tax year. A single late payment often escapes penalty, but a pattern of missed months can quickly add up to a serious bill on top of what was already owed.
This guide sets out how the penalty bands work, when interest is added on top, and what a director can do if a penalty looks wrong or unfair. It is general information, not a substitute for advice on your specific position.
How PAYE late payment penalties are structured
HMRC does not charge a penalty every time a PAYE payment is late. Instead, it counts "defaults" across the tax year, which runs from 6 April to the following 5 April. A default happens whenever you pay PAYE and NIC after the due date, even by a single day.
The first default in a tax year is not penalised on its own. It still counts towards the total, but HMRC treats it as a warning marker rather than a chargeable event, unless that payment ends up being more than six months late.
- Each subsequent default in the same tax year is charged at a percentage of the amount paid late.
- The percentage is based on the total number of defaults in the year, not on how late any single payment was.
- Penalties are calculated separately for each PAYE scheme an employer runs.
The percentage bands and how they increase with defaults
Once the first default has occurred, the rate charged on each further late payment increases as more defaults build up in the same tax year. The bands are:
- 1 to 3 further defaults: 1% of the amount paid late.
- 4 to 6 further defaults: 2% of the amount paid late.
- 7 to 9 further defaults: 3% of the amount paid late.
- 10 or more further defaults: 4% of the amount paid late.
Because the rate applies to every late payment in that band, not just the most recent one, an employer who is regularly a few days late can find PAYE late payment penalties climbing steadily through a single tax year without ever being wildly overdue on any one month.
Annual and additional penalties for persistent lateness
On top of the monthly default percentages, HMRC can charge an additional penalty where PAYE remains unpaid for a long period:
- A further 5% penalty on any amount still unpaid six months after its due date.
- Another 5% penalty on any amount still unpaid twelve months after its due date.
These additional charges apply separately from the monthly default bands, so genuinely old arrears can attract two extra 5% penalties as well as the percentage set by the number of defaults for that year. This is one reason older PAYE debt tends to be more expensive than it first appears, and why directors dealing with older arrears often look at their options for dealing with HMRC debt sooner rather than later.
Interest on late PAYE and NIC
Separately from any penalty, HMRC charges interest on PAYE and NIC paid after the due date. Interest runs from the date the payment was due until the date it is actually received, and it applies whether or not a penalty has also been charged.
The interest rate is set by HMRC and moves in line with the Bank of England base rate, so it changes over time. Because the exact figure varies, it is worth checking the current rate directly rather than relying on a fixed number — our guide to the HMRC late payment interest rate explains how it is calculated and where to find the current figure.
Appealing a PAYE penalty and reasonable excuse
A PAYE late payment penalty can be appealed if the employer believes it has been calculated wrongly, or if there is a "reasonable excuse" — a genuine, unexpected reason the payment could not be made on time.
Examples HMRC has recognised as a reasonable excuse in the right circumstances include:
- A sudden illness or bereavement affecting the person responsible for the payment.
- An unexpected failure of banking or HMRC systems that prevented payment.
- Circumstances genuinely outside the employer's control, provided the payment was made without unreasonable further delay once the issue was resolved.
Cash flow problems on their own are not usually accepted as a reasonable excuse. Appeals are made in writing to HMRC, setting out the reason and any supporting evidence, and there are strict time limits for lodging one. Where an appeal is unsuccessful, or where the underlying issue is an inability to pay rather than a dispute about the penalty itself, it is worth understanding the full range of options available when PAYE cannot be paid on time, including agreeing a payment plan with HMRC.
Frequently asked questions
Does the first late PAYE payment of the tax year get penalised?
Usually not. The first default in a tax year is not charged a percentage penalty, unless the payment is made more than six months late, but it still counts towards the total when working out the rate for later defaults.
How many months of PAYE lateness before penalties get serious?
The percentage rate increases in steps as defaults build up: 1% once you pass the first default, then 2% after four defaults, 3% after seven, and 4% after ten or more in the same tax year. Persistent lateness across most months of the year can add up to a meaningful percentage of everything paid late.
on the amount owed can be significant.
Can PAYE penalties and interest both apply to the same late payment?
Yes. Interest and penalties are charged separately and can both apply to the same overdue amount, so a single very late payment can involve interest for the whole period it was outstanding plus a percentage penalty and, if it runs on long enough, an additional 5% charge at six and twelve months.
Is there a time limit for HMRC to charge a PAYE penalty?
Yes, HMRC must assess a PAYE late payment penalty within a set time limit after the end of the relevant tax year. Because time limits and figures can be updated, it is worth checking the current position directly with HMRC or a regulated adviser rather than relying on a general rule of thumb.
What can I do if I cannot pay several months of PAYE at once?
Employers who have fallen behind on multiple months of PAYE sometimes arrange a Time to Pay agreement with HMRC, which spreads the arrears over an agreed period. It is generally worth acting before penalties and interest keep building, and speaking to a regulated specialist about the options for your company's specific circumstances.
This article is general information about how PAYE late payment penalties work and is not legal, financial or insolvency advice. Every company's circumstances are different, and directors should speak to a regulated specialist about their own position before deciding what to do next.
If PAYE arrears, penalties and interest are building up and you are not sure what your options are, Harbourfirst can introduce you to a regulated insolvency practitioner or solicitor to talk it through — start an enquiry. Harbourfirst introduces; it does not advise or act for you itself.