Going Self-Employed Mid-Career in 2026/27: Trading Allowance to VAT Threshold

Quick answer

Going self-employed mid-career in 2026/27 means moving from PAYE, where tax is handled for you, to a system where you track income, claim expenses and pay HMRC yourself. The trading allowance gives you the first £1,000 tax-free, Income Tax and Class 4 National Insurance apply to profits above £12,570, and you only deal with VAT once turnover tops £90,000. The biggest practical shift is cash flow: nothing is deducted at source, so disciplined saving for tax is essential.

Your first tax-free £1,000: the trading allowance

If you are testing a freelance idea alongside or just after employment, the trading allowance lets you earn up to £1,000 of gross income per tax year without registering or declaring anything. Cross £1,000 and you must report the income, but you can still deduct the £1,000 as a flat allowance instead of itemising small expenses.

You choose, per source, whether to claim the £1,000 allowance or your actual costs, whichever is larger. A photographer with £400 of kit costs would take the £1,000 allowance; one with £3,000 of costs would claim the real figure. You cannot use both on the same income.

Registering and the deadlines that matter

Once you are properly trading above the allowance, register for Self Assessment with HMRC. The official deadline is 5 October following the end of the tax year you started, so if you go self-employed during 2026/27 you have until 5 October 2027. Do not wait that long: registering early sets up your online account and gives you visibility of what you will owe.

Key dates to diarise:

• 31 January 2028 - file your 2026/27 return online and pay the balance.
• 31 July - second payment on account, if applicable.
• 31 October - paper return deadline (most people file online instead).

Missing the filing deadline triggers an automatic £100 penalty even if no tax is due, with further penalties and interest accruing after that.

What you will actually pay: Income Tax and National Insurance

Your taxable profit is income minus allowable expenses. Against that you have the £12,570 Personal Allowance (which tapers away by £1 for every £2 of income over £100,000). In England, Wales and Northern Ireland, Income Tax is 20% up to £50,270, 40% to £125,140, then 45% above.

On top sits Class 4 National Insurance: nothing up to £12,570, the main rate on profits between £12,570 and £50,270, then 2% on profits above £50,270. Class 2 NI is no longer a separate flat weekly charge for most traders, but your record still protects entitlement to the State Pension (around £241.30 per week) and contributory benefits, so check your contribution history.

A worked feel for it: on £40,000 of profit you pay 20% Income Tax and Class 4 NI on the slice above £12,570, leaving a meaningful but manageable bill. Use

to model your own figure, and to see the take-home after tax and NI.

Devolved note: Scottish taxpayers pay Scottish Income Tax on non-savings income, with more bands - a 21% intermediate rate, 42% higher rate (£31,092-£62,430), 45% advanced rate and a 48% top rate. National Insurance is reserved, so Class 4 NI is identical UK-wide. Wales sets the WRIT but currently matches the rest-of-UK rates.

Payments on account: the cash-flow trap

This is where new sole traders get caught. If your Self Assessment bill exceeds £1,000, HMRC assumes next year will be similar and asks you to pay it in advance in two instalments of 50%, due 31 January and 31 July.

In your first year that means your January payment can include the full balancing amount for the year just gone plus the first 50% on account for the year ahead - effectively 150% of one year's tax in a single hit. If your income later falls, you can apply to reduce payments on account, but over-reducing leaves you with interest to pay.

The defence is simple discipline: move 25-30% of every payment you receive into a separate tax savings pot the moment it lands. Treat that money as never yours.

Expenses, mileage and keeping records

You can deduct anything incurred wholly and exclusively for the business: stock, software subscriptions, professional insurance, accountancy fees, advertising and a reasonable proportion of home-working costs. Business travel is claimable, and if you use your own car the simplified mileage rate is 45p per mile for the first 10,000 business miles in the year, then 25p. You cannot claim ordinary home-to-work commuting.

Larger purchases such as a laptop or tools usually qualify for the Annual Investment Allowance, letting you write off the full cost against profit in the year of purchase. Keep digital records and receipts - Making Tax Digital for Income Tax is being phased in, starting with higher-turnover sole traders and landlords, so getting into the habit of quarterly bookkeeping now pays off.

When VAT enters the picture

You must register for VAT once your taxable turnover exceeds £90,000 in any rolling 12-month period - not just your accounting year - or if you expect to breach it within the next 30 days. The standard rate is 20%. Once registered you charge VAT on sales, reclaim it on purchases and file returns, usually quarterly.

Below £90,000 you can still register voluntarily. This makes sense if your customers are mostly VAT-registered businesses who reclaim the VAT anyway, because you then recover input VAT on your own costs. It rarely suits traders selling to the public, where adding 20% simply makes you dearer. Model the numbers with

before deciding.

Sole trader or limited company?

Many mid-career switchers start as sole traders for simplicity, then incorporate once profits justify it. A sole trader files one Self Assessment return; a limited company pays Corporation Tax (19% up to £50,000 profit, 25% above £250,000, with marginal relief between), files accounts at Companies House, and pays you through a mix of salary and dividends. Dividend tax rates are 10.75%, 35.75% and 39.35% after a £500 dividend allowance. Incorporation often becomes worthwhile somewhere above roughly £40,000-£50,000 of profit, but only after weighing the extra admin and accountancy cost. There is no single right answer - run both scenarios before you commit.