How much are the penalties for missing the self-assessment deadlines?
Filing your Self Assessment tax return late can lead to significant penalties from HMRC, which inevitably increase the longer the return remains outstanding, making it extremely important for taxpayers to meet the annual deadline and pay any tax they owe on time.
Initial £100 Late Filing of Taxes Penalty
If you miss the Self Assessment filing deadline, HMRC will immediately issue an initial fixed penalty of £100. This charge applies even if you have no tax to pay or if the tax due has actually already been paid in full. The penalty is triggered by the system automatically as soon as the return becomes overdue.
Additional Daily Penalties After Three Months
Once the tax return is more than three months late, further penalties begin to add up. HMRC charges £10 per day for up to 90 days, w...





