When you're employed, student loan repayments are deducted from your salary automatically. But when you go self-employed, it works completely differently — and catches a lot of people off guard.

This guide explains exactly how student loan repayments work for self-employed people, what you'll pay, and when.

How Self-Employed Student Loan Repayments Work

As a self-employed person, your student loan repayments are calculated through your Self-Assessment tax return. HMRC calculates what you owe based on your profit, and you pay it alongside your tax bill on 31 January.

Key differences from employment:

  • No monthly deductions — you pay annually via Self-Assessment
  • Based on profit, not turnover — after deducting allowable expenses
  • You must declare it yourself — tick the student loan box on your tax return
  • Payments on account may apply — advance payments towards next year's student loan repayment

Repayment Thresholds by Plan Type (2025/26)

You only repay if your profit exceeds the threshold for your plan type:

Plan Who Has It Threshold Rate
Plan 1 Started before Sept 2012 (England/Wales) or any time in NI/Scotland £22,015/year 9%
Plan 2 Started Sept 2012 or later (England/Wales) £27,295/year 9%
Plan 4 Scotland (started Sept 2012 or later) £27,660/year 9%
Plan 5 Started Sept 2023 or later (England) £25,000/year 9%
Postgraduate Loan Master's or doctoral loan £21,000/year 6%
Not sure which plan you're on? Check your original loan paperwork or log into your Student Loans Company account at repayment.slc.co.uk.

How to Calculate Your Repayment

The formula is simple:

(Your profit – Threshold) × 9% = Annual repayment

Example: Plan 2, £35,000 profit

  • Profit above threshold: £35,000 – £27,295 = £7,705
  • Repayment: £7,705 × 9% = £693
  • This is due alongside your tax bill on 31 January

Example: Plan 1, £45,000 profit

  • Profit above threshold: £45,000 – £22,015 = £22,985
  • Repayment: £22,985 × 9% = £2,069

Both a student loan AND postgraduate loan?

You pay both simultaneously. On £35,000 profit with Plan 2 + Postgraduate Loan:

  • Plan 2: (£35,000 – £27,295) × 9% = £693
  • Postgraduate: (£35,000 – £21,000) × 6% = £840
  • Total student loan repayments: £1,533

What Counts as "Profit"?

For student loan purposes, HMRC uses your net profit from self-employment — that's your turnover minus allowable business expenses. This is the same figure used to calculate your income tax.

If you also have employment income, both are added together to determine your total income above the threshold. This means:

  • Your employer deducts student loan from your salary (if above threshold)
  • HMRC calculates an additional amount on your self-employment profit
  • You pay the self-employment portion via Self-Assessment

Declaring Student Loans on Your Tax Return

On your Self-Assessment tax return, you'll see a question asking if you have a student loan. Tick yes, and select your plan type. HMRC then calculates your repayment automatically.

Common mistake: Not ticking the student loan box because you think it's handled elsewhere. If you're self-employed, it isn't — you must declare it.

When Student Loans Are Written Off

Plan Written Off After
Plan 1 Age 65 (or 25 years after first repayment for post-2006 loans)
Plan 2 30 years after first repayment
Plan 4 30 years after first repayment (or age 65 for pre-2007)
Plan 5 40 years after first repayment
Postgraduate Loan 30 years after first repayment

Should You Pay Off Your Student Loan Early?

This is one of the most debated personal finance questions in the UK. The answer depends on your plan type and how much you owe:

Generally don't pay early if:

  • You're on Plan 2 or Plan 5 — most borrowers won't repay in full before write-off
  • Your balance is over £30,000
  • Your income is unlikely to stay consistently high
  • You'd rather invest the money (the interest rate is often lower than investment returns)

Consider paying early if:

  • You're on Plan 1 with a small remaining balance
  • You're close to the write-off date and the remaining amount is small
  • Your income is high enough that you'd definitely repay in full anyway
  • The psychological benefit of being debt-free matters to you

Reducing Your Repayment (Legally)

Since student loan repayments are based on profit, anything that legitimately reduces your profit also reduces your repayment:

Common Mistakes

  • Not budgeting for it: Your January bill includes income tax, NI, AND student loan. Budget for all three.
  • Wrong plan type: Selecting Plan 1 when you're on Plan 2 (or vice versa) means wrong calculations. Check with SLC.
  • Overpaying after loan is cleared: If your loan is paid off mid-year, you might overpay via Self-Assessment. Request a refund from SLC.
  • Forgetting about mixed income: If you have both employment and self-employment income, make sure you're not being double-charged.

Your Total Self-Employment Tax Bill

When budgeting, remember your January payment includes:

  1. Income tax
  2. Class 2 and Class 4 National Insurance
  3. Student loan repayment
  4. Payments on account for next year (50% of all the above)

At £35,000 profit on Plan 2, your total January bill could be:

  • Income tax: £4,486
  • NI: £1,525
  • Student loan: £693
  • Payments on account: ~£3,352
  • Total: ~£10,056

This is why we always recommend keeping 25-30% of your income in a separate savings account.

Get Your Finances Organised

Our Getting Paid Toolkit (£19) includes income tracking templates, expense logs, and tax deadline calendars — so you're never caught off guard by your January bill.