If you are self-employed and repaying a student loan, the Self Assessment process can feel confusing. This guide explains what the calculator estimates and how to avoid common mistakes.
Many people are comfortable estimating Income Tax, but feel uncertain about student loan repayments in Self Assessment. The goal of this page is to clarify inputs and reduce “I entered the wrong thing” errors.
If you enable the student loan option and select a plan, the tool adds a simplified repayment estimate to the total. It is designed for planning, not for producing a filing-ready figure.
1) Confirm your plan type using your Student Loans Company info or payroll documents. 2) Use the estimate to plan set-aside amounts. 3) Verify final repayment amounts when you complete your return or review official guidance.
Not tax advice. If you have multiple income sources, refunds, or adjustments, the final position may differ.
Last updated: 2026-04-20
No. They are not an expense of your trade. In this tool they are modeled as an additional repayment estimate.
Use the plan selection guide on this site and confirm with official documents before relying on the estimate.
No. It is a simplified estimate for planning. Your final bill depends on official calculations and your complete circumstances.
For official rules and definitions, verify with the references below.