Jointly Owned Property and MTD: How to Report Your Share
How landlords report jointly owned property under Making Tax Digital — splitting income and expenses, married couples and the 50/50 default, Form 17, and keeping records for your share only.
The short answer
If you own a rental property jointly, you report only your share of its income and expenses in your own MTD quarterly updates. Married couples and civil partners are taxed 50/50 by default unless they own in unequal shares and submit Form 17. Other joint owners split according to their actual ownership or agreement.
Jointly owned rental property is common — couples, siblings, business partners. Under MTD the rule is simple: you report your share. The detail is in how that share is worked out.
The basic rule: report your share
Each joint owner includes their share of the property's income and expenses in their own property business. If you own 50%, you report half the rent and half the allowable costs. Each owner's MTD position is tested on their own total income.
Married couples and civil partners: 50/50 by default
There's a special rule for spouses and civil partners who own property jointly: income is split 50/50 by default, even if the underlying ownership is unequal.
If the true ownership is unequal (say 80/20) and you want to be taxed on those actual shares, you submit Form 17 to HMRC. It must:
- reflect the genuine beneficial ownership;
- be signed by both; and
- reach HMRC within 60 days of signing.
Without a valid Form 17, the 50/50 default stands.
Other joint owners
For non-spouses (siblings, friends, business partners), income and expenses are split according to the actual ownership shares or the partnership agreement — there's no automatic 50/50.
Record-keeping that keeps it simple
- Track the property's total rent and costs once.
- Apportion by each owner's share.
- Each owner enters their portion in their own MTD updates.
| Situation | How income is split |
|---|---|
| Married/civil partners, equal ownership | 50/50 automatically |
| Married/civil partners, unequal ownership | 50/50 unless Form 17 elects actual shares |
| Other joint owners | By actual ownership share / agreement |
Key takeaways
- You report only your share of a jointly owned property in your own MTD updates.
- Spouses/civil partners default to 50/50 — use Form 17 for actual unequal shares.
- Other joint owners split by real ownership.
- Track the property once, then apportion for each person.
This article is general information, not tax advice. Check the joint-ownership rules at gov.uk or speak to your accountant.
Frequently asked questions
How do we split rental income for a jointly owned property?
Generally in line with ownership shares. For married couples and civil partners, income is split 50/50 by default regardless of the actual shares, unless you own in unequal proportions and elect for the actual split using Form 17.
Does each owner file their own MTD updates?
Yes. Each owner reports their share of the joint property's income and expenses within their own property business, provided they're individually over the MTD threshold. One owner being in MTD doesn't automatically put the other in.
What is Form 17?
A declaration married couples and civil partners use to be taxed on their actual (unequal) ownership shares of jointly held property, instead of the automatic 50/50 split. It must reflect true beneficial ownership and be submitted to HMRC within 60 days.
Do we each keep full records?
You each keep records of your share. In practice you'll track the property's total income and costs once, then apportion by ownership share for each person's MTD submission.
Related reading
MTD for Landlords with Multiple Properties
How Making Tax Digital works if you own several rental properties — why they combine into one property business, how quarterly updates work across a portfolio, and record-keeping tips for landlords.
Landlord Allowable Expenses: What UK Landlords Can Claim
A plain guide to allowable expenses for UK landlords — repairs vs improvements, letting agent fees, insurance, the finance-cost rules, and what you can't claim — plus how expenses feed MTD quarterly updates.
Section 24: How Mortgage Interest Relief Works for Landlords
A plain-English explanation of Section 24 — why landlords can no longer deduct mortgage interest in full, how the 20% finance-cost tax credit works, who it hits hardest, and how it appears under MTD.