MTD for sole traders: complete guide for the £50k cohort

If you are self-employed in Northern Ireland and your turnover went over £50,000 in the 2024-25 tax year, the new Making Tax Digital rules apply to you from 6 April 2026. Your first deadline (a short summary to send HMRC) is 7 August 2026. Most of the sole traders we work with only realised in the past few weeks that this was happening to them.

If you have not used accounting software before, you are not alone. We sort out the software, train you on the bits you actually need, and handle the submissions for you.

This article covers the version of MTD that affects sole traders specifically: the threshold maths, the change to cash basis, what records you have to keep, what software fits each kind of trade, and the parts that catch people out. For the wider MTD framework (timeline, dates, who’s in), the Making Tax Digital 2026 overview is the place to start.

Are you in scope?

You are in the April 2026 cohort if all of these are true:

You are an individual, not a limited company
Your gross combined self-employment and property income in 2024-25 was over £50,000
That income was reported on your 2024-25 Self Assessment return (filed by 31 January 2026)

Gross matters. The threshold is your turnover, not your profit. A joiner with £75,000 of invoiced work and £30,000 of materials, fuel, and tools is at £75,000 of gross self-employment income, not £45,000 of net profit. They are firmly in the cohort.

If your 2024-25 turnover was below £50,000 you are not in this wave. The threshold drops to £30,000 from 6 April 2027 and to £20,000 from 6 April 2028, so most sole traders will be in scope within two years even if they are not now.

What “sole trader” means for HMRC

A sole trader is a person running a business in their own name, not through a limited company. You file your profits on your Self Assessment return (the annual tax return self-employed people fill in) and pay income tax and Class 4 National Insurance (NI for the self-employed) on the result.

For MTD ITSA, the test is whether you have self-employment or property income reported on Self Assessment. Most of the people we set up for MTD fall into one of these patterns:

Trades (plumbers, electricians, joiners, mechanics, builders)
Professional services (consultants, architects, accountants, designers)
Creative work (photographers, copywriters, filmmakers, musicians)
Online sellers (Amazon FBA, Etsy, eBay, Shopify)
Drivers and couriers (taxi, private hire, delivery)
Personal trainers, coaches, therapists
Tradespeople with a CIS sub-contractor status

Some sole traders run more than one trade. A consultant who also rents out a property has two separate businesses for HMRC purposes. The threshold test combines all sources.

What changes vs the old self-assessment-only world

Three things change in practice.

Digital records, from the start. Income and expenses must be captured in HMRC-compatible software at the point they happen, not transcribed at year end. Most sole traders we work with have been keeping records on paper, in a spiral notebook, or in an end-of-year spreadsheet. None of those is compliant on its own from 6 April 2026.

Quarterly submissions. A short summary of your income and expenses goes to HMRC every three months. The quarterly update is not a precise tax calculation; HMRC accepts that figures may need correcting at year end. But it is mandatory and it is on a fixed cadence: the period ends on the 5th of the relevant month and the update is due by the 7th of the following month.

Final declaration replaces Self Assessment. At the end of the tax year, a final declaration confirms your full position including any adjustments and reliefs. It replaces the traditional SA return for in-scope individuals. The deadline is unchanged: 31 January following the tax year end.

The work you used to compress into one annual return is now spread across the year. For most sole traders that is genuinely useful, because you see your tax position in close to real time. For sole traders who hate paperwork it is harder, because you cannot defer everything to January any more.

Cash basis is now the default

This part trips people up. “Cash basis” means you record income when the money lands in your bank, and expenses when they leave it. “Accruals basis” means you record income when you raise the invoice, and expenses when you receive the bill (even if you have not been paid or paid yet).

From the 2024-25 tax year, cash basis is the default for sole traders. You only switch to accruals if you specifically choose to.

Invoices issued but not paid do not count as income until the customer pays. Bills you have received but not paid are not expenses until you pay them. It is the simplest possible method and it is now the standard.

For most sole traders this is fine and matches how they think about money already. There are situations where accruals is better (commercial property letting beyond the first £150,000, for example, or businesses with stock). If you were on accruals previously and want to stay on it, the election is still available. We talk through the choice with every new MTD client.

The choice of basis affects how your software is configured, so getting it right at the start saves rework later.

The records you actually need to keep

For each transaction, you need to capture enough that HMRC can see what happened. In practice that means:

Income side:

The amount, currency, and date received
The customer (so income can be tied to a job or invoice)
Whether VAT applies if you are VAT-registered

Expense side:

The amount, currency, and date paid
The supplier and what was bought
The expense category (materials, fuel, tools, professional fees, insurance, vehicle costs, home as office, etc.)
A digital copy of the receipt or invoice attached or referenced

Mileage records, equipment registers (for capital allowance claims), and home-as-office calculations also need to be digital. Software like Xero, FreeAgent, and QuickBooks handles all of this once it is set up, with bank feeds doing most of the heavy lifting on the income and expense side, and apps like Hubdoc or Dext capturing receipts at the point of purchase.

The shoebox of receipts is not compliant on its own. The shoebox plus a phone scanning each one into Xero as it arrives is fine.

Software options for sole traders

We recommend different products depending on the kind of work and the volume of transactions.

Smaller sole traders (under £100k, simple records):

FreeAgent. Free if you bank with NatWest, RBS, Ulster Bank, or Mettle, otherwise around £15/month. Excellent for sole traders who want a clean simple interface. MTD-ready.
Coconut. Sole-trader-flavoured tool with a built-in business bank account. Around £6-£12/month. Good for trades and consultants who want one product covering banking and bookkeeping.
Pandle Free. Free, basic, MTD-recognised. Workable for the smallest businesses.

Active or growing sole traders (regular invoicing, employees, multiple income streams):

Xero. Around £30-£70/month. The most flexible product, with the strongest ecosystem of add-ons (mileage tracking, time tracking, project profitability). Our default recommendation for most sole traders with active businesses.
QuickBooks. Around £20-£50/month. Strong on invoicing and reporting. Fine for most use cases; we tend to recommend Xero over QuickBooks for sole traders, but the difference is small.

Spreadsheet purists:

If you have run on a spreadsheet for years and do not want to change, MTD is still possible through bridging software. We use Tax-Filer or Capium with these clients. The bridging tool sits between Excel or Google Sheets and HMRC, taking your quarterly totals and submitting them.

Pricing accurate as of May 2026 and we check it before recommending. Arro takes no affiliate fees on software, so the recommendation is independent.

Common sole trader scenarios

The decision tree changes by trade.

A Belfast-based plumber, turnover £85,000

In scope from April 2026. Most of the work is invoiced through a card terminal or BACS, so a tool like Xero with a bank feed handles 90% of the bookkeeping automatically. Materials and fuel run through the trade account at Wolseley or Edmundson Electrical and feed in via Hubdoc. The quarterly update typically takes us 30-45 minutes per client at this scale.

A consultant with £60,000 of fees and £20,000 of property income

In scope from April 2026 (combined £80,000). The consultancy and the property are separate income sources, reported separately within the same MTD account. Xero with two tracking categories or two separate businesses handles both cleanly.

An online seller doing £55,000 through Amazon FBA

In scope from April 2026. Amazon’s reporting needs to feed into compliant software, usually through a tool like A2X or Link My Books that bridges Amazon’s settlement reports into Xero or QuickBooks correctly. Manual data entry from Amazon’s CSV is technically possible but breaks down quickly at this volume.

A self-employed taxi driver, takings £55,000

In scope from April 2026. Cash takings need to be banked promptly and recorded in software, and mileage needs to be tracked digitally (a tool like MileIQ or the Xero mobile app does this). Vehicle running costs feed in via the bank account. Cash flow is the harder part of MTD for drivers, not the records.

A side-hustler: £25,000 employed PAYE, £30,000 self-employed graphic design

Out of scope in 2026 (£30k self-employed income only, below the £50k threshold). PAYE income does not count toward the MTD threshold. They will likely be in scope from April 2027 when the threshold drops to £30,000.

CIS and MTD: the construction wrinkle

If you work in construction as a sub-contractor under the Construction Industry Scheme, your customer deducts 20% (or 30% if not verified) at source before paying you. Your gross turnover for MTD threshold purposes is the gross figure before that deduction, not the net amount that landed in your bank account.

A joiner with £80,000 of CIS-deducted invoices receives roughly £64,000 net but is at £80,000 gross. They are firmly in scope.

Software needs to handle CIS correctly: gross income recorded, CIS deduction shown as a credit against tax, and the year-end position reconciled with HMRC’s CIS records. Xero and QuickBooks both handle CIS through dedicated modules. We set this up routinely.

When to think about going Ltd

MTD is not a reason on its own to incorporate. But it is a reason some sole traders are reviewing the structure now.

Limited companies are not in MTD ITSA. Their corporation tax is on a different track and there is no published implementation date for MTD for Corporation Tax. So one effect of MTD ITSA is to make the corporation tax route relatively simpler in compliance terms.

That is not a reason to incorporate by itself. The decision turns on profit level, drawings pattern, capital needs, succession plans, and a dozen other factors. We have a separate conversation with sole traders sitting at £80,000+ of net profit because the tax savings often justify the change. We do not push the conversation if the numbers do not support it.

What it costs

Two costs change.

Software: £0 to £70/month depending on the product. Most sole traders we set up land at £15-£30/month.

Accountancy fees: higher than the old self-assessment-only fee, because the work is genuinely more frequent. We quote a fixed annual fee that covers all four quarterly updates and the final declaration, after a brief review of the records and the trade. Most sole-trader MTD clients pay between £900 and £1,800 a year, all in.

Frequently asked questions

I’m self-employed but my income is below £50,000. Do I have to use MTD? Not yet. The April 2026 threshold is £50,000. The threshold drops to £30,000 from April 2027 and £20,000 from April 2028. Most sole traders will be in scope within two years.

Does cash basis affect my tax bill? Usually only modestly. Cash basis recognises income and expenses by when money moves, accruals by when the work happens. Over a stable year the two methods produce similar profits. Over a year where you have a lot of unpaid invoices at year end, cash basis can produce a lower taxable profit; the position reverses the next year when those invoices get paid.

I have two trades. Is each one tested separately? No. The threshold combines all your self-employment and property income into one figure. Two trades earning £30,000 each puts you over the £50k threshold.

What if I started self-employed during 2025-26 and have no 2024-25 SA return? You are not automatically in the April 2026 cohort because HMRC bases the test on a prior return that does not exist. You may join later once HMRC has data. We can help confirm your position.

How does CIS work under MTD? Gross income before CIS deduction is what matters for the threshold. CIS-registered software handles the deduction and the reconciliation with HMRC’s records.

Will MTD increase my accountancy fees? Yes, modestly. The work is genuinely more frequent than a single annual return. Most sole traders see fees rise by £200-£500 a year. Some see no change because their records become cleaner and faster to handle.

Can I do MTD myself without an accountant? Yes, if you are confident with the software, the rules, and the deadlines. Most sole traders we work with prefer to outsource it because the time cost of doing it themselves outweighs our fee.

Talk to us about MTD for your business

We set MTD up for sole traders across Northern Ireland. We choose the software, configure your records, train you on the parts you need, and handle every quarterly update. The first conversation is free and we will tell you exactly where you stand.