Sharing a Rental Property? How MTD Works for Joint Owners

If you own a rental property with someone else — most often a husband, wife or civil partner, but sometimes a sibling, friend or business partner — you might be wondering how Making Tax Digital fits in. Do you file together? Separately? Does one person handle everything?

The good news: joint ownership is genuinely common, and Making Tax Digital handles it in a straightforward way once you understand the basic principle. Let's walk through it calmly.

Tax is personal, even when the property isn't

Here's the key idea to hold onto: Making Tax Digital for Income Tax follows the person, not the property.

Even though you and your co-owner share the bricks and mortar, HMRC is interested in your share of the income and your tax position. Your co-owner has their own. You each report your own slice on your own record.

So if you jointly own a flat that brings in £20,000 a year in rent, and you split it 50/50, then £10,000 each is what lands on your respective records — not the full £20,000 on either of you.

How your share affects whether you're even in MTD

This matters a lot for the income thresholds, so it's worth pausing here.

Whether you need to join Making Tax Digital depends on your qualifying income — your gross rental and self-employment income before expenses. The phasing works like this:

Over £50,000: from 6 April 2026
Over £30,000: from 6 April 2027
Over £20,000: from 6 April 2028
£20,000 or under: not yet required to join

The number that counts is your share, not the property's total. So if a jointly owned property earns £36,000 a year gross and you split it evenly, you each have £18,000 of qualifying income from it. On its own, that sits under the £20,000 line.

But — and this is the bit people miss — you add up all your qualifying income. If you also have another property, or some self-employment, your share of the joint property is added to that. It's your personal total across everything that decides when (and whether) you join.

What you each actually have to do

Once you're in Making Tax Digital, each owner independently:

Keeps digital records of their share of the income and expenses.
Sends HMRC four quarterly updates across the tax year.
Submits one final declaration after the tax year ends.

The quarterly periods are the same for everyone. They end on 5 July, 5 October, 5 January and 5 April, with deadlines of 7 August, 7 November, 7 February and 7 May. From 2025-26 onwards, each update is a cumulative year-to-date total, so you're simply reporting the running total so far, not starting from scratch each quarter.

The final declaration is due by 31 January following the end of the tax year — the same familiar date Self Assessment always used.

A simple way to split the figures

The practical question is usually: "How do I work out my half?"

Most couples and co-owners agree a fixed split — often 50/50 — and apply it to every figure. So when £900 of rent comes in, you each record £450. When a £200 repair is paid, you each record £100 of the expense.

A few gentle pointers:

Agree your split clearly. For married couples and civil partners, jointly held property is usually taxed 50/50 by default, though there are exceptions. If you want a different split, there are formalities — worth a quick word with an accountant.
Be consistent. Whatever split you use for income, use the same for expenses.
Keep your own records. Even if one of you does the day-to-day admin, each person needs their own digital records and files their own updates.

It can help to keep one shared spreadsheet or shared statements for the property as a whole, then each take your agreed percentage into your own record. That way nothing gets counted twice or missed.

Two people, two records — but it needn't be double the stress

It's easy to assume joint ownership means double the faff. In practice, the figures only need working out once for the property; you each just take your share. The admin is light if you stay on top of it as you go.

This is exactly the sort of tidy, repetitive job software is good at. With Quarterwise, each owner keeps their own digital records and files their quarterly updates and final declaration to HMRC — so you both stay sorted without untangling one shared muddle at the year's end.

Joint ownership doesn't make Making Tax Digital complicated. It just means two calm, simple records instead of one.

This article is general information, not tax advice. Please check with HMRC or a qualified accountant about your own circumstances.