Compliance
Compliance Guide: Simple Assessment Letters and What You Need to Do
Many taxpayers may overlook their Simple Assessment letters—understanding and acting on them promptly can avoid penalties and simplify tax obligations.
By NomadicTax Research Team • 5-8 min read • August 15, 2026
## What Is a Simple Assessment Letter?
A **Simple Assessment** (letter PA302) is sent by HMRC when data from employers, financial institutions or government bodies shows tax due that hasn’t been collected through PAYE or your Self Assessment return. If HMRC sends one, you’re responsible for paying the amount by the deadline (or via instalments). ([gov.uk](https://www.gov.uk/government/news/hmrc-urges-customers-not-to-ignore-simple-assessment-letters?utm_source=openai))
Starting 30 June 2026, working-age earners began receiving them; pensioners started from 12 August. A second batch including bank and building society interest data will arrive October-December 2026. ([gov.uk](https://www.gov.uk/government/news/hmrc-urges-customers-not-to-ignore-simple-assessment-letters?utm_source=openai))
## Why This Matters
* You may not need to fill out a full Self Assessment if all your income is covered except for minor untaxed sources.
* Ignoring the letter does not make the debt go away; penalties may apply.
* It’s part of HMRC’s move toward simpler tax forms and more automatic assessments. ([gov.uk](https://www.gov.uk/government/collections/taxupdate-2026-simplification-modernisation-and-fairness?utm_source=openai))
## Steps to Take If You Receive a Simple Assessment Letter
1. **Check if it’s correct**
Review the income sources, amounts, and tax due. Check PAYE codes, pensions, foreign income etc.
2. **Pay by the deadline**
If you agree: pay in full; you can often pay in instalments via HMRC options. Use the HMRC app, GOV.UK online, bank transfer or cheque. ([gov.uk](https://www.gov.uk/government/news/hmrc-urges-customers-not-to-ignore-simple-assessment-letters?utm_source=openai))
3. **Dispute or request adjustments if you disagree**
If you think there are errors, contact HMRC. You might need to provide additional documents (payslips, bank statements etc.).
4. **Check if you need full Self Assessment**
If you receive a Simple Assessment but also have other income types, you might still need to file a Self Assessment return.
5. **Set reminders**
Don’t forget upcoming payment deadlines and follow-up checks especially when interest or penalties can apply.
## Real-World Example
**Scenario**: Tom has a salaried job under PAYE. He also received £800 interest from savings. He did not report this because he assumed the amount was too small.
HMRC automatically gathers bank interest data and finds tax unpaid, sending a Simple Assessment letter.
Tom reviews, sees the amount, arranges payment via direct debit to clear by deadline. He did not need a full SA return because his only non-PAYE income is the interest and nothing else is untaxed.
## Tips to Avoid Surprises in the Future
* Use your **Personal Tax Account** to monitor untaxed income showing up.
* Check bank statements and income sources throughout the year—not just at tax-return time.
* Keep records (bank interest notices, dividend vouchers, pension income) even if small—makes any disputes easier.
\--
Understanding and responding quickly to Simple Assessment letters helps you stay compliant and avoid extra costs or stress.