TaxSimba — Self Assessment for Landlords: What You Need for Your 2025/26 Tax Return
Preparation worksheet

Optional offline planning aid, not a tax return or filing confirmation.
Keep completed notes securely; never include passwords or one-time codes.

WORK THROUGH THIS EXAMPLE
Your mortgage payment is £900 a month, but that includes repayment of borrowing. Obtain the lender’s interest breakdown and keep it separate from rent, agent fees and repairs. Do not enter the full bank debit as a rental expense.

DECISION TO RESOLVE
Can the accountant identify interest, capital and any relevant finance charges?

YOUR POSITION
Relevant year and source: ____________________
Evidence supporting your answer: ____________________
Missing item and who will obtain it: ____________________
Deadline or next review date: ____________________

1. Prepare a gross rent schedule for 6 April 2025 to 5 April 2026.
Notes: ______________________________

2. Collect full-year agent and bank statements.
Notes: ______________________________

3. Record ownership shares and any changes.
Notes: ______________________________

4. Separate repair, improvement and finance-cost documents.
Notes: ______________________________

5. List other income, prior payments and return deadlines.
Notes: ______________________________

Actions agreed and responsible person:
____________________________________

Guide: https://taxsimba.co.uk/blogs/self-assessment-for-landlords-2025-26
Check the current guide and official sources before relying on a deadline or process.