Why Coming Forward to HMRC Early Matters
- BH Taxation

- Mar 23
- 2 min read
Many landlords are unaware that rental income must be reported to HMRC, particularly where the profits seem relatively small. Unfortunately, even modest undeclared profits can quickly lead to significant tax liabilities, interest, and penalties over a number of years.
Consider the following example:
A taxpayer earning £60,000 per year also receives rental profits of £5,000 annually from a property. The rental income is not reported to HMRC for five tax years.
As the individual is already a higher rate taxpayer, the rental profits would generally be taxed at 40%.
This would create:
Additional tax due of approximately £10,000
Interest charged by HMRC
Potential penalties
The difference between making an unprompted disclosure and waiting for HMRC to discover the issue can be substantial.

If the Taxpayer Comes Forward Voluntarily
Where the taxpayer approaches HMRC before any enquiry or compliance check begins, penalties can often be reduced significantly.
In this example, the overall liability may be approximately:
Tax: £10,000
Interest: approximately £1,500 to £2,000
Penalties: potentially as low as £1,000 to £2,000
Estimated total: £12,500 to £14,000
If HMRC Discovers the Issue First
If HMRC opens an enquiry before the taxpayer comes forward, penalties are generally much higher.
In the same scenario, the liability could increase to:
Tax: £10,000
Interest: approximately £1,500 to £2,000
Penalties: potentially £4,000 to £7,000 or more
Estimated total: £15,500 to £19,000+
HMRC Are Increasingly Identifying Undeclared Rental Income
HMRC now receives information from a range of sources, including:
Land Registry
Letting agents
Online rental platforms
Mortgage providers
Bank information
As a result, undeclared rental income is becoming increasingly difficult to hide over time. An activity humans continue attempting with admirable optimism.
Taking Advice Early Can Help
Where historic rental income has not been reported, taking professional advice early can help minimise penalties and ensure matters are resolved correctly with HMRC.
At BH Taxation, we assist landlords with voluntary disclosures, historic rental income issues, and bringing tax affairs up to date before HMRC opens an enquiry.



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