MTD for Second Income: Do Side Hustles Count?

More people than ever have multiple income streams. You might work full-time as an employee and run a small freelance business on the side. Or you might have a day job and a rental property generating additional income. With Making Tax Digital now live, the question is: does your second income bring you into MTD scope?

The answer depends on how much you earn and where that income comes from. This article explains the rules clearly so you know exactly where you stand.

How MTD Income Thresholds Work

MTD for Income Tax applies to individuals based on their qualifying income — which means gross income from self-employment and/or property. The thresholds are:

  • From April 2026: £50,000 or more
  • From April 2027: £30,000 or more

The critical detail is that qualifying income only includes self-employment income and property income. Employment income (PAYE salary) is not part of the calculation.

However, if you have both self-employment and property income, those amounts are combined to determine whether you reach the threshold.

Common Scenarios

Scenario 1: Employed Plus Freelancing

Example: Sarah earns £45,000 as a marketing manager (PAYE) and makes £15,000 freelancing as a graphic designer.

MTD status: Sarah's qualifying income is £15,000 (self-employment only). Her £45,000 salary does not count. She is below the £50,000 threshold and is not required to comply with MTD from April 2026. She will also be below the £30,000 threshold from April 2027.

Example 2: James earns £35,000 as a teacher and makes £55,000 from freelance photography.

MTD status: James's qualifying income is £55,000 (self-employment). He exceeds the £50,000 threshold and must comply from April 2026, regardless of his teaching salary.

Scenario 2: Employed Plus Rental Income

Example: David earns £60,000 as an engineer and receives £25,000 in rental income from a buy-to-let property.

MTD status: David's qualifying income is £25,000 (property income only). His £60,000 salary does not count. He is below both the £50,000 and £30,000 thresholds. MTD does not currently apply.

Example 2: Emma earns £40,000 in employment and receives £52,000 in rental income from multiple properties.

MTD status: Emma's qualifying income is £52,000 (property income). She exceeds the £50,000 threshold and must comply from April 2026.

Scenario 3: Freelancing Plus Rental Income

Example: Alex earns £28,000 from freelance web development and £25,000 from rental income.

MTD status: Alex's qualifying income is £53,000 (£28,000 self-employment + £25,000 property = £53,000). Even though neither income source exceeds £50,000 individually, the combined total does. Alex must comply from April 2026.

This is a scenario many people overlook. Each income source is modest, but combined they breach the threshold.

Scenario 4: Multiple Self-Employment Activities

Example: Rachel runs a small bookkeeping business earning £30,000 and also sells handmade jewellery online earning £22,000.

MTD status: Rachel's qualifying income is £52,000 (both activities are self-employment). She must comply from April 2026.

Multiple self-employment businesses are combined, just as self-employment and property income are combined.

Scenario 5: The Side Hustle That Stays Small

Example: Tom works full-time earning £50,000 and sells items on eBay earning £3,000 per year.

MTD status: Tom's qualifying income is £3,000. He is well below any threshold. MTD does not apply. He may not even need to file Self Assessment if his trading income is below the £1,000 trading allowance.

What About the Trading Allowance?

The £1,000 trading allowance lets you earn up to £1,000 from self-employment or casual trading without declaring it to HMRC. If your side income is below this threshold, you do not need to register for Self Assessment, let alone MTD.

If your side income exceeds £1,000, you need to register for Self Assessment and report it. Whether MTD then applies depends on whether your total qualifying income exceeds the MTD threshold.

Employment Income and MTD — The Key Point

This bears repeating because it is the most common source of confusion: employment income (PAYE) does not count towards the MTD qualifying income threshold.

Your employer handles your employment tax through PAYE. MTD for Income Tax is specifically designed for income that is currently reported through Self Assessment — namely self-employment and property income.

This means someone earning £200,000 in employment with no self-employment or property income has no MTD for Income Tax obligation. Conversely, someone earning £20,000 in employment with £55,000 in freelance income does have an MTD obligation — because the freelance income exceeds the threshold.

What You Need to Do If MTD Applies

If your qualifying income exceeds the threshold, you need to:

  1. Register for MTD for Income Tax through your Government Gateway account
  2. Choose MTD-compatible software — see our MTD software comparison for options
  3. Keep digital records of your self-employment and/or property income and expenses
  4. Submit quarterly updates to HMRC throughout the tax year
  5. File an End of Period Statement and Final Declaration after the tax year ends

Your employment income continues to be handled through PAYE as normal. Your Final Declaration at the end of the year brings all your income together to calculate your total tax position.

For a detailed walkthrough of the quarterly process, see our guide on your first MTD quarterly update.

What If Your Side Income Fluctuates?

Many side hustles and second incomes are not consistent year to year. You might have a good year that pushes you over the threshold, followed by a quieter year that drops you below it.

HMRC determines your MTD obligation based on your qualifying income in the previous tax year. So if your 2025-26 qualifying income exceeds £50,000, you must comply with MTD from April 2026, even if your 2026-27 income turns out to be lower.

If your income drops below the threshold, you may be able to exit MTD — but there are conditions, and you should check with HMRC or your accountant before assuming you can stop.

The Impact on Your Tax Return

Under MTD, your Final Declaration replaces the traditional Self Assessment tax return. It includes all your income sources:

  • Self-employment income (reported quarterly throughout the year)
  • Property income (reported quarterly throughout the year)
  • Employment income (pulled from your PAYE records)
  • Other income (dividends, interest, capital gains — entered at Final Declaration stage)

The Final Declaration calculates your total tax liability for the year, taking into account tax already paid through PAYE and any payments on account.

Planning Ahead

If your side income is growing and approaching the threshold, it is worth preparing for MTD before it becomes mandatory:

  • Start keeping digital records now — it is easier to build the habit voluntarily than under deadline pressure
  • Choose software early — try it with no obligation and get familiar with the interface
  • Understand the quarterly cycle — knowing what to expect reduces stress when compliance becomes real

ClearMTD offers a free trial that lets you explore the software and understand the process before your obligation kicks in. There is no penalty for starting early, and you will be well ahead of the curve.

Try ClearMTD for free and get your second income organised before the deadline.

Frequently Asked Questions

Does dividend income count towards the MTD threshold?

No. Dividend income is not qualifying income for MTD for Income Tax. Only self-employment income and property income count towards the threshold. Dividends are reported through the Final Declaration but do not trigger the MTD requirement.

What if I earn self-employment income in another country?

Foreign self-employment income counts towards your qualifying income if you are UK tax resident. You would report it through your MTD submissions alongside your UK income. The rules around foreign income can be complex — consider getting professional advice if this applies to you.

Do I report my employment income through MTD software?

No. Your employment income continues to be handled through PAYE by your employer. Your MTD quarterly updates only cover self-employment and property income. Employment income is incorporated at the Final Declaration stage, typically pulled from HMRC's PAYE records.

Can I use the same MTD software for self-employment and property income?

Yes. Most MTD software, including ClearMTD, supports both self-employment and property income within the same account. You record each income type separately, and the software handles the correct reporting to HMRC.

What if my side hustle becomes my main income?

The MTD rules do not distinguish between "main" and "side" income. What matters is the total qualifying income from all self-employment and property sources combined. If it exceeds the threshold, you comply — regardless of which income source is primary.