You Earned Over £50,000 from Self-Employment or Property. Read This Before 7 August.

You have probably seen the letters MTD. Maybe in a tax letter. Maybe on the news. Maybe buried in a thread you closed after the first line.

It is not abstract. It is a real deadline and it is in four days. If your self-employment or property income crossed £50,000 in the 2024/25 tax year, you are in scope and your first quarterly update is due to HMRC by 7 August 2026.

This is the calm, specific version. No jargon. No legal hand-waving. The facts you need and the one thing to do this week.

What MTD for Income Tax Actually Means

MTD is short for Making Tax Digital. It is HMRC's way of moving Self Assessment away from one annual paper or spreadsheet submission, to four short quarterly updates sent through software that talks to HMRC directly.

In plain English. Instead of telling HMRC once a year what you earned, you tell them four times a year what you earned in that three-month chunk. Each update is a summary. It takes minutes, not hours.

It is not a new tax. The tax rules are the same. It is a new way of reporting what you already owe.

The change became mandatory from April 2026 for sole traders and landlords whose combined self-employment and property income is over £50,000. From April 2027 the threshold drops to £30,000. From April 2028 it drops again to £20,000. So if you are not in scope yet, you probably will be.

Are You In Scope? The Three Checks

HMRC's test is simple but it has three parts. All three must be true for MTD to apply to you.

1. You earn income from self-employment, property, or both. A salaried job alone does not count. If you are a sole trader, a freelancer, a side hustler with £40,000 of PAYE plus £20,000 of freelance income, the £20,000 is what gets measured. If you rent out one or more properties, that rental income counts too.

2. Your combined qualifying income is over £50,000. "Qualifying income" means gross turnover from self-employment and gross rental income, before any expenses or tax. Add them together. If the total is more than £50,000 in the relevant tax year, you are in.

3. You already file Self Assessment. If you do not file a Self Assessment return because your income is below £1,000 of self-employment or below £2,500 of rental income, MTD does not pull you in.

If those three are true, you need to be signed up for MTD and submitting quarterly updates.

The fastest way to check your own position is to look at your 2024/25 Self Assessment return. The self-employment and property turnover lines are what matter. If either is large, or they add up to over £50,000 together, you are in scope.

The 7 August Deadline and the Four-Dates-a-Year Rhythm

For most people, the 2026/27 tax year is split into four quarters. Each quarter has its own update deadline.

Quarter 1. 6 April to 5 July 2026. Update due 7 August 2026. That is the one in four days.

Quarter 2. 6 July to 5 October 2026. Update due 7 November 2026.

Quarter 3. 6 October 2026 to 5 January 2027. Update due 7 February 2027.

Quarter 4. 6 January to 5 April 2027. Update due 7 May 2027.

Each update covers income and expenses for its three-month window. You still file a Self Assessment tax return by 31 January 2028 for the 2026/27 year, and that is when the final bill is settled. The quarterly updates are summary submissions, not separate tax bills.

One thing that often gets missed. Some taxpayers can use calendar quarters instead of HMRC's April start. If you run your accounts on a calendar year, check GOV.UK for whether your 2026/27 dates shift. The first calendar-quarter update is still due 7 August 2026, so the urgency is the same.

What Happens If You Miss the Deadline

Here is the bit the headlines got wrong, and the bit the financial industry has not told you clearly.

For the 2026/27 tax year, your first year in MTD, no penalty points are issued for missing a quarterly update. You will not get a £200 fixed penalty if you slip up in August. That does not mean the deadline is optional. Your tax bill still lands on 31 January 2028. If your quarterly updates are missing, your final tax return sits on incomplete data and your bill is harder to plan for.

From the 2027/28 tax year onwards, the new penalty regime kicks in. One penalty point per missed quarterly update. Once you reach four points, a £200 fixed penalty is charged, and another £200 each time you miss another deadline. The points also apply if you miss your Self Assessment return on 31 January.

The real cost of missing the deadline in 2026/27 is not a fine. It is the lost forecast. After each quarterly update, your software shows you a running estimate of what your tax bill will be for the year. If you skip the updates, you lose that visibility. For most self-employed people that means the January tax bill arrives as a surprise instead of a planned number. The surprise usually costs more than the fine ever would.

What You Actually Have To Do

Three things. None of them is hard.

1. Sign up for MTD. You do this on GOV.UK. If you use an accountant or tax agent, they can sign you up instead. Signing up takes about ten minutes.

2. Pick MTD-compatible software. Spreadsheets are out. Paper is out. You need accounting software that HMRC has approved for MTD. The list is on GOV.UK and includes free options, paid options, and accountant-supplied options. Most do a free trial. If you already use accounting software for your business, check whether your existing provider has added MTD support, and if not, what the migration looks like.

3. Send the quarterly update. Log into your software at the end of each quarter. Enter or import your income and expenses. Hit submit. It sends directly to HMRC. Most people who have done it say it takes about ten minutes, not the hours of dread an annual tax return can take.

What About Tax You Already Owe

Quarterly updates do not change how much tax you owe. They change when and how you tell HMRC about it.

If your side hustle or rental income is over £50,000, you are probably already paying this year's tax in two instalments. Payments on account land on 31 January and 31 July. If those instalments are based on your 2024/25 tax bill and your 2026/27 income is similar, you are roughly covered.

If your income has jumped this year, or you have added a new income source since April 2026, those payments on account may not be enough. The 31 July payment on account, which falls in the same week as the quarterly update, is the moment to check.

A Worked Example

Consider a freelancer in their early forties.

In the 2024/25 tax year they earned £68,000 from their limited company work via a Personal Service Company, plus £14,000 from a couple of rental properties. Self-employment turnover plus property turnover is what gets measured.

Their 2026/27 payment on account, set in January 2026, was based on a tax bill of around £14,800, so two instalments of £7,400 each. That is roughly right for £82,000 of income after expenses and the personal allowance.

Now imagine they add a £6,000 contract in May and a new tenant from June. Income for the year is heading towards £100,000 instead of £82,000. The July payment on account is still £7,400. The shortfall lands in January.

That is the situation MTD quarterly updates are designed to surface early. By the end of August, this person can see their software's running forecast and adjust. Without the update, they find out in January, and HMRC starts charging late-payment interest from day one.

The point is not the £200 penalty or the £400 interest charge. The point is the £6,000 of additional tax, planned for in August, or panicked about in January.

Who Has To Pay Attention Now Versus Later

This post is for the £50,000 bracket because that is who has the deadline on 7 August 2026.

If your combined qualifying income is over £50,000, the 7 August quarterly update applies to you. Sign up, pick software, send the update. This week.

If you are between £30,000 and £50,000, you have until April 2027. The same software and the same quarterly rhythm will apply. You have time. Use it to pick software while it is calm rather than in a panic in March 2027.

If you are between £20,000 and £30,000, you have until April 2028. By then, MTD will be normal and the experience will be smoother. Sign up when your provider is ready.

If you are under £20,000, you are not currently in scope. Check again at the next Budget.

What About Exemptions

HMRC allows exemptions in specific circumstances. If you are digitally excluded because of age, disability, location, or another reason that makes quarterly digital reporting genuinely difficult, you can apply for an exemption and stay on the old Self Assessment process.

The exemption is not a polite way to opt out because quarterly updates feel like a hassle. It is for people for whom digital filing is a genuine obstacle. If you fall into that group, the application is on GOV.UK and you keep your current Self Assessment process.

The One Thing To Do This Week

If you are in the £50,000 bracket, here is the job.

Step 1. Pull up your 2024/25 Self Assessment. Look at the self-employment turnover and the property income lines. Add them up.

Step 2. If the total is over £50,000 and you have not yet signed up for MTD, sign up today. Ten minutes on GOV.UK.

Step 3. Pick compatible software. The list is on GOV.UK under "Find software that works with Making Tax Digital for Income Tax." Most have a free trial. Choose one. Link it to your MTD account.

Step 4. Send your first quarterly update. Cover 6 April to 5 July 2026. Income, expenses, submit. Ten minutes of work. Done.

Related reading

• Self-employed financial guide - the wider picture for freelancers and sole traders, including pension contributions, IR35, and what to set up the day you go freelance.
• Side hustle guide - if your side income is the line that tips you over £50,000, this is the plain-English version of what changes once you cross the line.
• Am I overpaying tax on my rental income? - the 5-minute check on allowable deductions before you send the next quarterly update.
• Get your finances clear in 90 days - the broader plan for the rest of the quarter if MTD is the trigger to sort everything else.

Sources

• HMRC press release: Deadline approaches for first Making Tax Digital quarterly update (23/07/2026)
• GOV.UK: Use Making Tax Digital for Income Tax (updated 16/07/2026)
• GOV.UK: Penalties for Making Tax Digital for Income Tax (updated 30/03/2026)
• GOV.UK: Find software that works with Making Tax Digital for Income Tax

General information for UK residents. Figures are illustrative. Check your own Self Assessment and HMRC guidance before acting. Delphina is not a tax adviser; for tax decisions specific to your situation, consult an HMRC-registered tax agent or use HMRC's own guidance.