MTD for Small Businesses (2026–2028): Costs, Benefits and a Clear Preparation Timeline

Making Tax Digital (MTD) for Income Tax Self Assessment (ITSA) is the biggest practical change to small business tax reporting in a generation. From April 2026, many self-employed people and landlords will move from one annual Self Assessment return to digital record keeping plus quarterly updates, followed by a year-end finalisation.

In this guide, we’ll walk through what MTD for small businesses really means in day-to-day terms: the likely costs, the benefits, the downsides (including increased HMRC reporting), and a preparation timeline you can actually follow. The aim is simple: you should feel clear, prepared, and in control well before your start date.

What is MTD for Income Tax (ITSA) in plain English?

MTD for ITSA is HMRC’s move towards a more digital tax system for sole traders and landlords. Instead of keeping records in a paper notebook (or a spreadsheet that isn’t properly linked) and then doing everything at the year end, you’ll be expected to:

• Keep digital records of your income and expenses (in software, or a spreadsheet with digital links).
• Send quarterly updates to HMRC during the tax year (summaries of income and expenses).
• Finalise your business/property figures after the year end (often referred to as an EOPS-style finalisation).
• Submit a final declaration to confirm your overall taxable income (similar to the final step of Self Assessment).

It’s important to know what MTD isn’t: quarterly updates are not the same as quarterly tax bills. For most people, tax payment dates are not changing simply because you’re sending quarterly updates (payments remain aligned with Self Assessment rules unless HMRC changes those separately).

Who must comply and when? (2026–2028 rollout)

MTD for ITSA is being introduced in stages, based on your qualifying income (broadly, your gross income from self-employment and/or property).

If you’re not sure whether your income is above the threshold, don’t guess. The safest approach is to review your most recent tax return and your current year position, then plan early. Even if you’re below the threshold today, many small businesses grow past it sooner than expected.

What you’ll need to do under MTD (practical checklist)

Think of MTD as four connected habits. If you get these right, compliance becomes routine rather than stressful.

1) Keep digital records

You’ll need to record income and expenses in a digital format. For most people, this means using MTD-compatible accounting software. In some cases, a spreadsheet can still be used, but only if it’s set up with digital links to bridging software so the submission to HMRC is not copy-and-paste.

2) Submit quarterly updates

Each quarter, you’ll send a summary of your income and expenses to HMRC. These updates are not a full tax return, and they can be adjusted later. But they do mean more frequent reporting, and that’s a real change for many small businesses.

3) Do year-end finalisation

After the tax year ends, you’ll finalise your figures. This is the point where you’ll make year-end adjustments (for example, capital allowances, private use adjustments, and accounting corrections).

4) Submit a final declaration

This is the step that confirms your total taxable income for the year, including other income sources that sit outside the quarterly updates. It’s the closest equivalent to today’s Self Assessment submission.

MTD for small businesses: the real costs (and how to keep them sensible)

Costs vary depending on how organised you already are, whether you use an accountant, and how complex your income is (for example, multiple properties, multiple trades, or mixed VAT/CIS positions). Here are the main areas to plan for.

1) Software subscription

Most small businesses will need MTD-compatible software. That usually means a monthly subscription. Some providers offer entry-level plans; others charge more for features like receipt capture, invoicing, bank feeds, and multi-currency.

• Typical cost: a modest monthly fee (varies by provider and plan).
• What to watch: introductory offers that rise after a few months; add-ons for payroll, projects, or multiple users.

2) Time cost (the hidden one)

The biggest cost for many people isn’t the software — it’s the time to keep records up to date. If you currently do your books once a year, MTD will feel like a step up. The good news is that once you build a routine, it often becomes quicker than the annual scramble.

In practice, most clients do best with a weekly or fortnightly rhythm: reconcile bank transactions, attach receipts, and deal with anything unusual while it’s still fresh in your mind.

3) Accountancy and support fees

If you already use an accountant for Self Assessment, you may see a change in how support is delivered. Some clients prefer to do the bookkeeping themselves and ask us to review and submit. Others want a more hands-on service, especially in the first year.

What matters is agreeing who does what — bookkeeping, quarterly submissions, year-end adjustments, and final declaration — and making sure nothing falls between the cracks.

4) Training and setup

There may be a one-off setup cost: choosing software, setting up categories, connecting bank feeds, and agreeing a record-keeping process. This is time well spent. A tidy setup prevents repeated mistakes across four quarterly updates.

5) Better records may increase taxable profit (sometimes)

This sounds odd, but it happens. When records become more accurate, HMRC gets a clearer picture. If you’ve previously under-reported income (even accidentally), MTD-style reporting reduces the chance of that continuing. That can mean higher tax — not because MTD raises rates, but because the figures become more correct.

Benefits of MTD for small businesses (what you may gain)

MTD is often presented as a compliance burden — and yes, it does add reporting. But there are genuine benefits when it’s set up properly.

1) Less year-end panic

If you keep records throughout the year, the January rush becomes far less painful. Instead of hunting for missing invoices and trying to remember what a card payment was for, you’re simply finalising what’s already in order.

2) Clearer view of cash flow and profitability

Good software gives you a live view of what you’re earning, what you’re spending, and what you can safely take out. That’s particularly helpful for seasonal businesses and for landlords managing repairs and mortgage interest changes.

3) Fewer avoidable errors

When you’re doing everything at the year end, it’s easy to misplace receipts, forget small expenses, or double-count items. Regular bookkeeping reduces these errors. It’s also easier to spot anything that looks wrong (for example, duplicate bank transactions or miscategorised costs).

4) Better tax planning

Quarterly figures (even if they’re not the final taxable profit) can help you plan ahead. You can set money aside gradually, consider pension contributions, and avoid nasty surprises.

Downsides and risks (including increased HMRC reporting)

It’s only fair to be honest: MTD brings more touchpoints with HMRC and more opportunities for things to be missed if you don’t have a system.

1) More deadlines to manage

Under Self Assessment, you’re used to one main annual submission. Under MTD, you’ll have quarterly submissions plus year-end steps. More deadlines mean more chances to be late if you’re not organised.

2) Increased HMRC visibility

Quarterly updates mean HMRC receives information more frequently. That doesn’t automatically mean more investigations, but it does mean your reporting is more regular and easier for HMRC systems to compare over time.

3) Early figures can be misleading

Quarterly updates are summaries and can change later. But if you look at them without context, they can give a false sense of security (or panic). For example, a big equipment purchase in one quarter can make profits look low, while income-heavy quarters can make tax look higher than it will be after year-end adjustments.

4) Software errors and poor setup

Software is helpful, but it’s not magic. If categories are wrong, bank feeds are duplicated, or personal spending is mixed in without clear treatment, your quarterly updates may be messy. The fix is usually simple: set up properly, and keep on top of it.

5) The temptation to submit “rough” updates

Some people will be tempted to rush quarterly updates with incomplete records and tidy it up later. Occasional corrections are normal, but a pattern of poor-quality submissions can create stress at the year end and increases the risk of mistakes.

Preparation timeline: what to do and when (so you’re ready)

Here’s a sensible, low-stress timeline we recommend at Tax Digital. Adjust it based on your start date (April 2026, 2027, or 2028).

12–18 months before your start date

• Confirm whether you’re in scope based on your income level and expected growth.
• Decide how you’ll keep records: software, or spreadsheet plus bridging (if appropriate).
• Clean up your current records: separate business and personal spending as much as possible.
• Open a separate business bank account if you don’t have one already (not legally required for sole traders, but very helpful).

9–12 months before

• Choose MTD-compatible software that fits your business habits (not just what’s popular).
• Set up categories that match how you spend money in real life.
• Start using receipt capture (if available) to reduce missing paperwork.
• Agree responsibilities: what you do vs what your accountant does.

6–9 months before

• Run a “shadow” quarterly process: do a quarterly tidy-up and produce a draft profit figure (even before you must submit).
• Fix recurring issues: uncategorised items, mixed-use costs, missing invoices.
• Build a routine: weekly or fortnightly bookkeeping is usually the sweet spot.

3–6 months before

• Check your digital links if you’re using spreadsheets or multiple systems.
• Prepare for the first quarterly deadline: diarise it and plan time to review before submission.
• Talk through tax budgeting: decide how you’ll set money aside for tax and NIC.

From your start date (April 2026/2027/2028)

• Keep records up to date throughout each quarter.
• Submit quarterly updates on time (don’t leave it to the last day).
• Do a light review after each submission: what went well, what needs tightening for next quarter.
• Plan year-end finalisation early so it doesn’t collide with January pressures.

Typical costs to track (Self-Employed and Landlords)

Because your audience here is Self-Employed and Landlords, it’s worth highlighting the types of costs that commonly cause confusion. Under MTD, you’ll want these recorded cleanly and consistently.

For self-employed people

• Travel and mileage (keep a simple log if using mileage rates).
• Tools and equipment (some items may be treated differently at the year end through capital allowances).
• Phone and broadband (often mixed-use; you may need a reasonable business proportion).
• Use of home as office (again, often needs a clear method).
• Subcontractor costs (where relevant) and any industry-specific compliance costs.

For landlords

• Repairs and maintenance (repairs vs improvements can matter).
• Letting agent fees and management charges.
• Insurance and service charges.
• Safety certificates and compliance costs (gas, electrical, EPC, etc.).
• Mortgage interest (now treated under specific rules; your software setup should reflect that correctly).

If you’re ever unsure whether something is allowable, don’t wait until the fourth quarter. Ask early, record it consistently, and keep the evidence (invoice/receipt) attached in your records.

Can you still use spreadsheets under MTD?

Sometimes, yes — but with conditions. HMRC’s direction of travel is towards software-based records. If you use spreadsheets, you will generally need bridging software to submit updates, and you must maintain digital links (meaning the numbers flow through digitally, not by manual copy-and-paste).

For many small businesses, a simple software package is actually less stressful than trying to keep spreadsheet links compliant. The right answer depends on your confidence, the complexity of your income, and how likely you are to keep up the routine.

How to prepare without it taking over your life

Most MTD problems we see come down to two things: leaving it late, and not having a repeatable process. Here’s a straightforward approach that works well for small businesses.

1. Separate money where possible: a dedicated bank account and (if appropriate) a separate card for business spending.
2. Pick one system and stick to it: constantly switching tools creates gaps and duplicated transactions.
3. Do a weekly mini-check: reconcile, attach receipts, and clear anything you can’t remember.
4. Keep a “questions” note: list anything you’re unsure about and ask your accountant monthly/quarterly.
5. Review each quarter: treat it as a quick health check, not a major event.

Common questions we hear at Tax Digital

Will I have to pay my tax quarterly under MTD?

Not automatically. MTD for ITSA introduces quarterly reporting. Tax payment dates remain based on Self Assessment rules unless separate changes are introduced. What will change is that you’ll have more regular visibility of your figures, which can help you budget for tax.

Are quarterly updates the same as a tax return?

No. Quarterly updates are summaries and can be adjusted later. The year-end finalisation and final declaration are where your figures are properly confirmed.

What if my records aren’t perfect in the first year?

Most people need a bedding-in period. The key is to build a consistent process and correct issues as you go, rather than ignoring them until the year end.

Do I still need an accountant if everything is digital?

Many people can do day-to-day bookkeeping in software, but an accountant is still valuable for: checking accuracy, handling tricky areas (private use, capital allowances, property rules), planning ahead, and making sure submissions are correct and on time.

Next steps: a simple plan you can act on this week

• Check your likely start date (2026, 2027, or 2028) based on your income.
• List your current record-keeping method and what’s not working (missing receipts, mixed spending, year-end rush).
• Choose a realistic routine (weekly or fortnightly) and put it in your diary.
• Get your software decision made early so you can practise before MTD is mandatory for you.

If you approach MTD steadily, it becomes a manageable change rather than an unpleasant surprise. The earlier you start, the more choice you have — and the calmer your first quarterly deadline will feel.