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How to Register as a Self Employed Pilates Instructor: FREE income & expense tracker

So you've decided to teach on a self-employed basis....WAHOOO brilliant! Whether you're teaching a few classes a week alongside another job, or building this into your main income, getting the paperwork sorted early means you can focus on what you actually love doing: teaching.

This isn't as scary as it sounds. Here's what you actually need to do, kept as simple as possible and stick around to the end, because there's a free tracker to help you actually put this into practice.



Registering as a Self Employed Pilates Instructor

The moment you start earning money from teaching Pilates, even just one class you're classed as self-employed Pilates Instructor in the eyes of HMRC, and you need to register.


When: You need to register with HMRC once you start earning money from teaching. Don't leave it too long after you start, as there's a registration deadline each tax year. The current date and how to check it are on gov.uk, so it's worth a quick look to make sure you're within the window.


How:

  1. Go to gov.uk and register for Self Assessment as a sole trader

  2. You'll need your National Insurance number and personal details

  3. HMRC will send you a Unique Taxpayer Reference (UTR) — keep this safe, you'll need it every year

  4. You'll also be set up to pay Class 2 and Class 4 National Insurance automatically through Self Assessment

That's it!!!! No company to set up, no complicated forms. Just you, registered as a sole trader.


Understanding Self Assessment

Once registered, you'll complete a Self Assessment tax return once a year, telling HMRC what you earned and what you spent.

  • Tax year: runs 6th April to 5th April

  • You'll need to file online and pay what you owe by set deadlines each year. These are published on gov.uk, so it's worth checking the current dates rather than relying on memory (mine included!)

  • Some people also make a "payment on account" towards next year's bill partway through the year

It sounds like a lot, but if you keep good records through the year (more on that below), filling it in is genuinely a few hours' work.


Tax Basics for Instructors

A simple rule of thumb: set aside roughly 20-25% of what you earn for tax, so it's never a shock in January.

You only pay tax on your profit — (what's left after business expenses). As a Pilates instructor, that typically includes things like:

  • Studio or hall hire

  • Insurance (public liability, professional indemnity)

  • Kit and equipment (mats, props, reformer maintenance)

  • CPD courses and training

  • Mileage if you travel to teach (there's a set HMRC rate per mile)

  • A portion of your phone bill if you use it for bookings/admin

Keep receipts for everything: a simple folder or app photo is enough.


Keeping Simple Records

You don't need fancy software to start. A simple tracker — money in, money out — updated regularly, will save you hours of stress later. If your teaching grows, apps like QuickBooks or FreeAgent can automate a lot of this, but they're not essential on day one.


To help you get started, I've put together a free Income & Expense Tracker: A simple spreadsheet with a tab for every month and a summary that adds it all up for you automatically. No spreadsheet experience needed, just fill in the boxes as you go.




Going self-employed is one of the best decisions you can make as a newly qualified instructor it just comes with a bit of admin. Get these basics right early, and everything else about running your own teaching practice gets a lot easier.


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