Late Tax ReturnAccountants
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Multi-Year Late Return Exposure Estimator

Add each year you haven't filed. We calculate the total penalties, interest, and tax owed across all years, and show you what filing now would save.

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£
days

Penalties

£1,600

Interest

£564

Tax owed

£3,000

Year total

£5,164

HMRC may have issued a determination for this year. Enforcement risk is significant.
£
days

Penalties

£1,600

Interest

£796

Tax owed

£3,000

Year total

£5,396

HMRC may have issued a determination for this year. Enforcement risk is significant.
Days overdue are auto-calculated from the 31 January deadline for each tax year. Adjust manually if you know a different date. Interest calculated at 7.75% p.a. (HMRC rate as at June 2026).

What voluntary disclosure typically saves

Coming forward before HMRC contacts you qualifies as an "unprompted disclosure". HMRC reduces penalty percentages by up to 30% compared to a prompted disclosure.

On £3,200 in penalties, that's a potential saving of up to £960.

Total exposure

£10,560

2 years outstanding

Free, no-obligation assessment. Response within 2 hours.

£4,560 penalties + interest, on £6,000 taxBreakdown ▾
Total tax owed£6,000
Total penalties£3,200
Total interest£1,360
Penalties + interest£4,560

High enforcement risk

One or more years are past 12 months. HMRC has enforcement powers including determinations, bailiff instructions, and bank account freezing.

HMRC can enforce on the oldest years

Possible saving from coming forward voluntarily

£960

Once HMRC opens an enquiry, the lower unprompted penalty rate is off the table.

Years behind on tax?

Penalties grow every month unfiled