Are Season Ticket Loans Tax Free? The £10,000 Threshold Explained

Season ticket loans from your employer are tax free as long as the combined balance of every interest-free loan your employer has given you stays at or below £10,000 on every day of the tax year. That exemption comes from Section 180 of the Income Tax (Earnings and Pensions) Act 2003, which treats small interest-free employer loans as outside the benefits code.¹ Cross the line even briefly and HMRC will tax you on the interest you’re saving by borrowing at zero percent.

The £10,000 Threshold and Why It Catches People Out

HMRC assesses the £10,000 limit on a day-by-day basis. If the total you owe your employer sits at or below £10,000 on every single day of the tax year, no tax charge arises. A typical annual rail season ticket costs well below that figure, so a standalone loan almost never breaches the ceiling on its own.

The problem is aggregation. Your season ticket loan isn’t looked at in isolation. Any other interest-free lending from the same employer counts toward the same £10,000 pot: a relocation advance, a hardship loan, a training cost advance. If your £6,000 rail loan sits alongside a £5,000 emergency loan, the combined £11,000 tips you over the threshold and the interest benefit becomes taxable.²

Before you ask for a season ticket loan, check with your payroll team whether you already have any other employer loans outstanding. The threshold applies to the total, not to each loan individually.

What You Actually Pay If You Go Over

Once your combined loans cross £10,000 at any point in the tax year, the arrangement becomes a “beneficial loan” and HMRC taxes you on the interest you would have paid at commercial rates. The official rate used for the calculation is 3.75% for the 2025/26 and 2026/27 tax years.³

The numbers stay modest. On a £12,000 loan outstanding for the full year, the taxable benefit is £450 (£12,000 × 3.75%). A basic-rate taxpayer at 20% would owe £90 in extra tax for the year; a higher-rate taxpayer at 40% would owe £180. HMRC works out the benefit using an averaging method: it takes the balance at the start and end of the year, averages them, and applies the official rate for the months the loan was outstanding.⁴

The tax rarely causes real financial pain, but it does erode the value of the loan and it drags your employer into P11D reporting and Class 1A National Insurance on the interest benefit.⁵ That gives the company its own reason to keep balances under £10,000.

Leaving Your Job Before the Loan Is Repaid

If your loan agreement lets the employer deduct the outstanding balance from your final pay, they can recover what you owe from your last salary payment and any accrued holiday pay. Most agreements include this clause because the alternative is messier: if your final pay doesn’t cover the balance, your former employer can ask you to repay on agreed terms, and if you refuse they can pursue it through the courts as a civil debt.

The tax picture shifts if the employer writes the balance off instead of chasing it. A forgiven loan stops being a loan and becomes taxable earnings. The written-off amount is added to your income for that tax year and taxed at your marginal rate, and the employer owes Class 1A National Insurance on the same figure. People sometimes assume a former employer has quietly absorbed the cost, then find extra tax showing up on their return.

This is why the loan agreement matters. A signed document setting out the amount, the repayment schedule, and what happens if you leave keeps the arrangement looking like a genuine loan. Without one, HMRC may treat the whole advance as additional pay, taxable in full from the outset.

Season Ticket Loans Are Not Salary Sacrifice

A season ticket loan and a salary sacrifice arrangement are two different things, and the £10,000 exemption only covers the loan. With a loan, your gross pay is unchanged and you repay from your net salary in monthly instalments. With salary sacrifice, you give up part of your gross pay and your employer buys the ticket directly.

Salary sacrifice for transport falls under the optional remuneration rules introduced in April 2017. If the benefit provided is worth less than the salary given up, the higher figure gets reported as the taxable value. An arrangement structured through salary sacrifice will not qualify for the small loans exemption the way a straightforward loan does, so it’s worth being clear which one your employer is actually offering before you sign.