New Self Assessment penalties for late returns and late affect returns for 2010/11 which are shortly becoming due.

The new penalties for late Self Assessment returns are:



Miss filing deadline


3 months late

Daily penalty £10 per day for up to 90 days (max £900)

6 months late

5% of tax due or £300, if greater

12 months late

5% or £300 if greater, unless the

taxpayer is held to be deliberately withholding information that would enable HMRC to assess the tax due.

12 months & taxpayer deliberately withholds information

Based on behaviour:

  • deliberate and concealed withholding 100% of tax due, or £300 if greater.
  • deliberate but not concealed 70% of tax due, or £300 if greater.

Reductions apply for prompted and unprompted disclosures and telling, giving and helping.

* No reduction if payment is made on time, there is a loss or a nil liability.

Interest will also be charged on top of these penalties.

The tax return deadlines remain unchanged – 31 October for paper and 31 January for online returns. The deadline for paying any tax due also remains the same at 31 January.

For further information see:

Tax penalties: failure to make a return (late filing)

Tax penalties: self-assessment late filing (up to 2009/10)

For more information on other tax penalties visit our: Penalties & Compliance section.

Subscribers: we recommend:

Adviser's Tax Penalty Planner a summary of the transitional tax penalty regime: what penalty will apply, when, where and why.





We hope you are enjoying this amazing Practical Tax Database here at

Sign up now to receive our unique FREE Newsletter full of Tax Planning Tips & Know-How.

.Squirrel ad