Tax Returns for Personal Trainers
Written and reviewed by the Personal Trainer Accountants editorial team. Last reviewed 8 August 2026.
The annual return, done properly and early enough that the bill is not a surprise. This is the service most trainers come for and for many it is the only one they need.
How self assessment works for a self-employed trainer is set out on the self-employed trainer guide. This page is what we do and how it runs.
What the Return Covers
Income from every source you train through: gym clients, online coaching, class fees, bootcamps, sponsorship and any employment income alongside it. Then the expenses, which is where the work actually is, because the figure most trainers arrive with is too low rather than too high.
We apply the flat rates where they beat the alternative, including mileage at 55p for the first 10,000 business miles and the monthly home working rate, both covered on the expenses page. Then the return itself, filed and confirmed, with the tax and any payment on account set out before the deadline rather than on it.
Where Trainer Returns Get Awkward
Three situations. A first return, where there is often a payment on account nobody warned you about and the bill lands roughly half as large again as expected. A mixed year, where you were employed for part of it and self-employed for the rest, which is common when trainers go independent mid-year. And online coaching income paid through platforms, which needs care over what was actually received against what was billed.
The fourth is missing records. It is workable, it takes longer, and it is worth saying at the start rather than at the point we ask for the mileage log.
How the Year Runs
We ask for your figures once the tax year ends in April, not in January. Filing early does not mean paying early, the payment date is still 31 January, and knowing the number in May is the difference between saving for it and borrowing for it.
You see the return and the expense schedule before anything is filed. If we have claimed something you are not comfortable with, it comes out.
Fees for Tax Returns
A fixed fee agreed in writing before any work starts, based on how you are set up and how organised the records are. Nothing is charged until you agree it.
If your position turns out to be simple enough that you would be better off filing it yourself, we will say so. That happens more often in this trade than in most.