Making Tax Digital for chimney sweeps: what changes from April 2026

TL;DR: Making Tax Digital for Income Tax Self Assessment (MTD ITSA) applies to self-employed UK chimney sweeps in three income steps: over £50,000 from 6 April 2026, over £30,000 from 6 April 2027, and over £20,000 from 6 April 2028. Three real changes land at once: digital records must be created by each relevant update deadline (HMRC recommends creating them as close to the transaction date as possible), you submit four quarterly updates from compatible software each year on top of your Self Assessment tax return using compatible software, and you need compatible software. The underlying tax calculation does not change. Same money, different rhythm. Chimney sweeps face specific wrinkles around seasonal demand spikes, part-cash mixed-payment reality, low overhead structures with high repeat-customer volume, and service scheduling discipline. Quarterly reporting makes all of these more visible than a once-a-year tax return ever did. This post sets out what actually changes, what stays the same, and how to stay compliant without over-engineering your record-keeping.

Current HMRC rule: Each update is calculated by compatible software from digital records and covers cumulative category totals from the start of the tax year to the end of the update period - not only the previous three months. If record keeping and filing use different software, keep a permitted digital link between them; manual re-keying or clipboard transfer is not a digital link. HMRC will not apply penalty points for late quarterly updates in 2026/27, but the updates must still be sent before you submit your Self Assessment tax return using compatible software. Check HMRC digital-record guidance, quarterly-update guidance and HMRC's current MTD journey.

2026/27 simplified mileage rate: For self-employed simplified expenses, HMRC's rate for cars and goods vehicles is 55p per business mile for the first 10,000 miles and 25p per business mile after that. The 55p rate applies retrospectively from 6 April 2026. Check GOV.UK simplified vehicle expenses before relying on the figures.

If you work as a self-employed chimney sweep or sole-trader sweeping contractor in the UK, the MTD ITSA headline is straightforward. Mandatory digital records and quarterly updates in three steps:

• From 6 April 2026, qualifying income over £50,000.
• From 6 April 2027, qualifying income over £30,000.
• From 6 April 2028, qualifying income over £20,000.

Qualifying income is your combined self-employment and property income. If you rent out equipment or run any property income alongside your sweeping work, that rental income counts toward the same total.

The three real changes:

1. Digital records from the start, not reconstructed at year-end. Your income and expense records must be created by the relevant update deadline and kept in a structured digital format; HMRC recommends creating them as close to the transaction date as possible. A spreadsheet can work if it pairs with compatible software connected through a permitted digital link. Some cloud accounting software can handle both record keeping and filing; check HMRC's current compatible-software list and the provider's supported features. Paper receipts can still be kept, but an annual-only reconstruction is not enough once MTD applies because the required digital records must exist by each update deadline.
2. Four quarterly updates per tax year, plus a Self Assessment tax return using compatible software. Each update contains cumulative totals for the categories you use, from the start of the tax year to the update-period end. The tax calculation still happens at year-end. The rhythm changes, not the complexity.
3. Compatible software. The existing self-assessment portal will not accept MTD ITSA submissions. You need cloud accounting software with direct MTD submission built in, or a spreadsheet paired with compatible bridging software that supports the workbook and a permitted digital link.

Worth saying plainly: quarterly figures are provisional. They are not mini tax returns. They show HMRC your business is active and give a running picture. No additional tax calculation happens at the quarterly stage.

Most service businesses have relatively clean income and expense categories. Chimney sweeping has layers that matter specifically for quarterly reporting.

The autumn rush and seasonal income spikes. Chimney sweeping is highly seasonal, with much of the activity often falling from late summer into autumn. That can make the cumulative total grow much faster in some update periods than others. This is not a compliance problem; every update still covers the tax-year start through the current update-period end.

This seasonal concentration also means that a sweep who crosses the MTD threshold in a peak year must track their compliance date carefully. If your income first crossed £50,000 in the 2024–25 tax year, mandatory compliance starts April 2026 regardless of whether the next year is quieter.

Cash and mixed-payment reality. A significant proportion of chimney sweeping work is paid in cash at the point of service. Under MTD, every payment received must be recorded digitally in the period it arrives. Cash jobs that were previously noted loosely and reconciled at year-end now need to be entered at the time. This is not a new tax obligation. Cash income has always been taxable. It is a new recording discipline that catches up with anyone who has been informal about it.

Mixed-payment jobs (part cash, part bank transfer, with an element paid by the householder's landlord) are common in rental properties. Each element is still income in the period received, regardless of who pays it or how.

Low-tool-cost, high-repeat-volume structure. Chimney sweeping typically has lower material costs than most trades. The main expense categories are equipment maintenance, consumables (brushes, rods, bags, sealant), vehicle costs, and insurance. But because sweeps often serve the same customers on an annual or twice-annual schedule, income can arrive in dense bursts when a route is run. Recording income as it arrives (per job, per day) rather than in weekly or monthly batches is the discipline that makes quarterly updates accurate.

Appointment scheduling and income recognition. Some sweeps take advance bookings with deposits. Under MTD, the question of when to record the income matters. HMRC's general guidance for sole traders is that income is recorded when the payment is received, not when the work is done. A deposit received in Q1 for work carried out in Q2 is Q1 income. Consistent handling of this from the start of the MTD period avoids reconciliation problems at year-end.

A quarterly update reports income and expenses by category. The categories you will typically track on the expense side for a sole-trader chimney sweep:

• Equipment and consumables: brushes, rods, chemical treatments, soot bags, vacuum filters, inspection cameras, and replacement parts. Items replaced regularly below the capital threshold.
• Equipment maintenance and repair: servicing of vacuums, inspection equipment, and rodding sets.
• Vehicle costs: van insurance, fuel, servicing, road tax. If you use HMRC's self-employed simplified-expenses mileage rate (55p per mile for the first 10,000 miles, 25p thereafter), you record mileage rather than actual vehicle costs.
• Protective equipment: overalls, gloves, dust masks, eye protection, knee pads.
• Insurance: public liability insurance, tools and equipment cover.
• Professional fees: accountancy, any trade body memberships (HETAS, NACS, APICS, Guild of Master Chimney Sweeps), professional indemnity where held.
• Phone and communications: the business proportion of your mobile and any admin system costs.
• Marketing and administration: website costs, booking system subscriptions, appointment reminder services.
• Training and certifications: any trade-specific qualifications, first aid, chimney inspection training.
• Software: accounting software subscriptions, invoicing tools.

Your software sends cumulative totals for each category at every update, not individual receipts. The paperwork stays in your records.

Your software uses either standard update periods or calendar update periods. Each update is cumulative, not a separate three-month return. Under standard periods the coverage runs 6 April-5 July, 6 April-5 October, 6 April-5 January and 6 April-5 April; under calendar periods it runs 1 April-30 June, 1 April-30 September, 1 April-31 December and 1 April-31 March. The corresponding deadlines are 7 August, 7 November, 7 February and 7 May. The tax return is due by 31 January after the tax year.

The time required varies with transaction volume, record quality and the software you use; the continuing duty is to keep accurate digital records and check the software-generated update. The ongoing work is in keeping your income and expense records current throughout the year, not in the quarterly filing act itself.

For a chimney sweep whose busiest months fall across Q2 and Q3, the natural point to establish a recording routine is at the start of the sweep season, before the autumn rush begins. Starting Q2 with clean records in place is far easier than reconstructing three months of October bookings in November.

Cloud accounting software. Platforms such as Xero, QuickBooks, or FreeAgent at £12–£30 per month. They handle income recording, expense categorisation, mileage tracking, and cumulative MTD updates natively. Best fit: sweeps with higher turnover, repeat-customer booking systems already in place, or those running subcontractors who want one system handling financial administration.

Spreadsheet plus bridging software. You maintain your own spreadsheet recording income and expenses by category; compatible bridging software receives the records through a permitted digital link and submits the cumulative update to HMRC. Best fit: sweeps with simpler finances, sole-trader operations with clear cash-and-transfer income patterns, and those comfortable maintaining their own records.

Hand it to your accountant. Your accountant manages the quarterly updates from the records you supply. The incremental cost for quarterly updates may be reasonable if they already handle your year-end. The catch: your accountant can only submit what you have recorded. You still need to maintain digital records between meetings. Handing everything over in January will not work on a quarterly schedule.

There is no single right answer. The right tool depends on your transaction volume, your seasonal income distribution, and how much of this you want to own yourself.

If your records are currently informal (cash jobs noted loosely, a spreadsheet started and abandoned, receipts gathered approximately), the April 2026 deadline is the hard reset.

1. Separate business and personal money completely. A dedicated business bank account and card make every quarterly step faster and eliminate the most common source of reconciliation errors.
2. Choose your approach now. Cloud accounting, spreadsheet plus bridging, or accountant-managed. Set it up before the first quarterly period begins.
3. Establish your income and expense categories consistently. Consistent categorisation from day one of Q1 is easier than restating categories mid-year.
4. Record all cash income as it arrives. Every cash payment is income in the period received. A simple log per job is sufficient. The discipline is the point.

If you do nothing else before April: open a dedicated business account and start recording every payment the same day it arrives. Everything else cascades from that.

Quarterly updates are still required. HMRC says it will not apply penalty points for late quarterly updates in 2026/27; for later tax years, missed update deadlines can generate penalty points and a financial penalty once the threshold is reached.

For the document side of running a chimney sweep business, including client contracts, pre-sweep risk assessments, certificates of sweeping, and complaint-handling procedures, see essential business documents for UK chimney sweeps.

Check current GOV.UK guidance and HMRC compatible-software information for your own MTD obligations.

This article is general guidance, not tax advice. For your specific tax position and income-recognition approach, consult a qualified accountant or tax adviser with sole-trader service sector experience.