Sole Trader Tax Allowances 2025/26: Stop Leaving Money Behind

If you invoiced £60,000 last year and paid tax on every penny above your personal allowance, you almost certainly overpaid. The 2025/26 tax year brings a set of allowances, reliefs, and thresholds that most sole traders either partially use or miss entirely, and HMRC will not write to remind you.

This is not a general introduction to self-assessment. It is a specific, figure-led breakdown of every sole trader tax allowance available right now, what has changed since last year, and how much each one is worth in actual pounds to someone turning over £50,000 to £80,000.

The Personal Allowance: Frozen, and Getting More Painful

The standard Personal Allowance for 2025/26 is £12,570. That is the amount of profit you can earn before paying any income tax. It has not moved since April 2021, and the government has confirmed it will remain frozen until at least April 2028.

That sounds neutral. It is not. If your day-rate or job prices have risen with inflation, and they almost certainly have, you are earning more pounds but those extra pounds are taxed. The Office for Budget Responsibility estimated that the freeze would drag approximately 3.2 million additional people into paying higher rates of tax by 2028. For a sole trader earning £55,000 in 2025/26 versus £50,000 in 2020/21, that freeze costs roughly £1,000 more in income tax per year in real terms, before you have changed your habits at all.

If your sole trader profits exceed £100,000, your Personal Allowance tapers. At £125,140 you have no personal allowance at all, which creates an effective 60% marginal tax rate on income between £100,000 and £125,140. Pension contributions or Gift Aid donations can restore some of it. That is not a technicality; it is a legitimate, legal strategy worth discussing with a tax adviser if your profits are approaching that band.

Income Tax Bands for Sole Traders in 2025/26

Once you are past the Personal Allowance, your taxable profit falls into these bands:

• Basic rate (20%): £12,571 to £50,270
• Higher rate (40%): £50,271 to £125,140
• Additional rate (45%): above £125,140

For a sole trader with £65,000 of taxable profit, the maths works like this: the first £12,570 is tax-free, the next £37,700 is taxed at 20% (£7,540), and the remaining £14,730 is taxed at 40% (£5,892). Total income tax: £13,432, before National Insurance. That context matters when you are weighing whether a particular allowance is worth claiming.

National Insurance for Sole Traders in 2025/26

Sole traders pay two classes of National Insurance on their profits.

Class 2 NIC was effectively abolished from April 2024. Previously a flat weekly charge, it is now treated as if paid automatically when you submit your self-assessment return, as long as your profits exceed the Small Profits Threshold of £6,725. This protects your state pension entitlement without any additional payment. If your profits fall below £6,725, you can still make voluntary Class 2 contributions at £3.45 per week to preserve your NI record.

Class 4 NIC is the one that actually costs you money:

• 6% on profits between £12,570 and £50,270
• 2% on profits above £50,270

Note: Class 4 NIC was reduced from 9% to 6% in April 2024, a cut that saves a sole trader earning £50,000 approximately £1,131 per year compared to 2023/24. If you have not updated your mental model of what you owe, you may be setting aside more than necessary.

For a sole trader with £65,000 of profit, Class 4 NIC works out at: 6% on £37,700 (£2,262) plus 2% on £14,730 (£295). Total NIC: £2,557. Combined with income tax of £13,432, the total liability is £15,989, leaving net income of £49,011 before any allowances or reliefs.

The Trading Allowance: The One Nobody Talks About

If you have a secondary income stream alongside your main sole trader business, say, you sell items on eBay, do the occasional odd job for a neighbour, or earn rental income from parking a vehicle, the Trading Allowance gives you £1,000 of tax-free gross income per year from that activity.

The key point: you do not need receipts or records to claim it. You simply deduct £1,000 from that income stream. You cannot also claim actual expenses against the same income if you use the Trading Allowance, so it only makes sense when your actual costs are low or non-existent.

For most secondary income earners, £1,000 of tax-free income is worth £200 in saved income tax (basic rate) or £400 (higher rate). It takes about thirty seconds to claim on your self-assessment return and is routinely ignored.

Capital Allowances and the Annual Investment Allowance

If you bought a van, specialist tools, a laptop, or any equipment for your business in 2025/26, you are entitled to capital allowances. The Annual Investment Allowance (AIA) allows you to deduct 100% of the cost of qualifying plant and machinery in the year of purchase, up to £1,000,000. For a sole trader, that limit is effectively unlimited.

In practice: a plumber who buys a new work van for £18,000 can deduct the full £18,000 from their taxable profit in the year of purchase. At the higher rate of tax, that is £7,200 in saved tax. This is not a loophole. It is the intended policy. But HMRC does not prompt you to claim it, and the definition of "plant and machinery" is broader than most tradespeople realise. It includes:

• Tools and equipment
• Computers and tablets
• Vehicles used for work (with private use restrictions applied proportionally)
• Office furniture used for a dedicated workspace

For a detailed look at what counts as a deductible business expense, see our post on Sole Trader Expenses You Are Probably Forgetting to Claim.

The Marriage Allowance: Worth £252 a Year

If you are married or in a civil partnership and your sole trader profits fall below the Personal Allowance (£12,570), you can transfer £1,260 of your unused Personal Allowance to your spouse or civil partner, reducing their tax bill by up to £252 per year.

This matters for sole traders in a specific situation: if your business has had a slower year, perhaps you took time off, worked part-time, or are in the early stages of trading, and your partner earns above £12,570, the Marriage Allowance is free money. HMRC allows backdating for up to four previous tax years, so you could potentially claim up to £1,008 in one go if you qualify and have not already done so.

The Savings and Dividend Allowances

If your sole trader business earns you enough to save, or if you have structured part of your income through a small limited company that pays dividends, two further allowances apply:

Personal Savings Allowance: £500 for higher-rate taxpayers (down from £1,000 for basic-rate taxpayers). Interest earned on savings accounts, Premium Bonds prizes, and similar is covered here.

Dividend Allowance: reduced to £500 for 2025/26 (down from £5,000 in 2018/19, a series of cuts that represent one of the quieter stealth tax increases of recent years). If you are a sole trader who also holds shares in a side venture or employer, dividends up to £500 are tax-free.

Neither of these is transformative at the current levels, but they are worth recording correctly on your return to avoid being charged tax you do not owe.

Pension Contributions: The Biggest Lever Most Sole Traders Ignore

This is the allowance with the largest potential impact that sole traders consistently underuse. You can contribute up to 100% of your net relevant earnings (essentially your taxable profit) per year into a pension, capped at the Annual Allowance of £60,000 for 2025/26.

Contributions to a personal pension (a SIPP is the most common vehicle for sole traders) attract tax relief at your marginal rate. A sole trader earning £65,000 who contributes £10,000 to a pension:

1. Reduces their taxable profit by £10,000
2. Saves £4,000 in income tax (at 40% on income in the higher rate band)
3. Saves £200 in Class 4 NIC (at 2% on income above £50,270)
4. Effectively gets £10,000 of retirement savings for a net personal outlay of £5,800

If those pension contributions also bring your profit below £50,270, you avoid the higher rate entirely on the income pulled back under the threshold. For a sole trader hovering just above £50,270, this is one of the most cost-efficient things they can do in a tax year.

How MTD Changes the Way You Capture These Allowances

From April 2026, Making Tax Digital for Income Tax (MTD ITSA) will require sole traders with income above £50,000 to submit quarterly updates to HMRC via compatible software. Those earning above £30,000 follow from April 2027.

This changes the mechanics of how you track and claim allowances. Currently, most sole traders reconcile allowances once a year when filing their self-assessment return. Under MTD, your records need to be maintained digitally and continuously, which means you need to categorise capital expenditure, pension contributions, and business expenses in real time rather than reconstructing them in January.

The silver lining, if you can call it that, is that maintaining live records makes it harder to miss allowances. If your software captures a van purchase at the point of payment, your AIA claim is already in the system. For more on what the quarterly submission process looks like in practice, see Your MTD First Quarterly Update: What Actually Happens.

For software that is built specifically around the needs of sole traders without the overcomplicated interface of tools designed for accountants, TapTax is worth a look. And if you are comparing options on cost, our post on Cheapest Making Tax Digital Software: Stop Overpaying covers what you should actually expect to pay.

A Concrete Example: What These Allowances Are Worth Together

Take a self-employed electrician with gross receipts of £72,000 in 2025/26. After deducting £8,000 in business expenses (materials, fuel, phone), their taxable profit is £64,000.

Without any additional planning, they would owe:

• Income tax: approximately £13,432
• Class 4 NIC: approximately £2,557
• Total: approximately £15,989

Now apply three allowances they are legitimately entitled to:

1. AIA on a new drill, ladder system, and van-racking costing £3,200 reduces profit to £60,800
2. Pension contribution of £10,530 (bringing profit to £50,270, back to the basic rate threshold)
3. Marriage Allowance (their partner earns £28,000; they transfer £1,260 of allowance): saves £252

Revised liability:

• Income tax on £50,270: approximately £7,540
• Class 4 NIC on £50,270: approximately £2,262
• Marriage Allowance saving: minus £252
• Total: approximately £9,550

The difference is £6,439. That is not aggressive tax avoidance. It is using the allowances Parliament designed for exactly this purpose. The electrician's pension pot has grown by £10,530, funded partly by money that would otherwise have gone to HMRC.

The One Thing to Do Today

You opened this post wondering whether you were leaving money behind. The honest answer for most sole traders earning £50,000 to £80,000 is: yes, almost certainly, and the pension contribution lever is the most likely place to find it.

Before the 2025/26 tax year closes on 5 April 2026, check three things: whether you have claimed all capital allowances on equipment purchased this year, whether a pension contribution could pull your profit below the 40% threshold, and whether you qualify for the Marriage Allowance. Those three checks alone could recover thousands of pounds that HMRC has no obligation to point out to you.

If you want to make sure your records are ready for MTD and that every allowance is captured as you go rather than scrambled for in January, TapTax is built for exactly that.

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