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Joint Property, Multiple Owners.
Split Profit Automatically.

Manage rental income and expenses for jointly owned properties, with each owner's share calculated and reported separately.

Whether you own jointly with your spouse, a family member or a business associate, and whether your profit share is 50:50, 60:40 or a bespoke arrangement, RentalBux handles it. Set your ownership percentages once and the software calculates each co-owner's share automatically across every transaction.

Professional Landlord
Built by Property Accountants
Rated 4.9/5 (Trustindex)
FCA Authorised
Set once, Auto-Split Forever
Separate MTD Per Owner
Any Split Ratio

"Rentalbux has honestly made our lives so much easier. We used to spend hours sorting out who owed what and dividing up the rental income from our properties. Now we just click a few buttons and it's done. Everything's clear and transparent between us, which is brilliant because it takes away any awkwardness about money. Plus, we don't have to worry about the MTD stuff coming in. Seriously recommend it if you're co-owning properties!"

Sarah & Tom K.

Sarah & Tom K.

Joint landlords, Birmingham

December 2025

3 Properties
60:40 Ownership
Verified

Joint Ownership Creates Shared Admin. RentalBux Removes it.

When you own rental property with a spouse, partner or business associate, each co-owner is responsible for reporting their individual share of income and expenses to HMRC under Making Tax Digital for Income Tax Self Assessment. Without the right tools, that means duplicated effort, manual calculations and a high risk of figures that do not agree between owners. RentalBux removes that problem by splitting income, expenses and quarterly MTD updates automatically, based on the ownership percentages you set.

Without RentalBux

  • Two subscriptions required
  • Manual transaction splitting
  • Calculation errors and HMRC penalties
  • Double the admin, double the cost

With RentalBux

  • One subscription covers up to three Owners
  • Set your split once, auto-split forever
  • Accurate, auditable HMRC-compliant
  • Half the work, full compliance

Add Co-Owners and Set Ownership Percentages

Define each co-owner's share of the property and their profit-sharing ratio separately, so the software reflects your actual arrangement.

Under Making Tax Digital for Income Tax Self Assessment, each co-owner must report their individual share of rental income and expenses to HMRC on a quarterly basis. RentalBux handles this automatically. Set up your ownership structure once, and every transaction, report and submission is divided according to each owner's percentage. Where your profit-sharing arrangement differs from your ownership split, for example following a Form 17 election between spouses, you can record both separately so your submissions remain accurate.

Set Your Split Once.
RentalBux Handles the Rest.

Accurate profit allocation, effortless quarterly reporting, and full compliance with HMRC's
MTD ITSA — automatically.

Automatic profit splits

Automatic Profit Splits

Rental income and expenses are divided between all co-owners automatically, based on the ownership percentages you have set. There is no need to calculate or allocate figures manually each time a transaction is recorded.

Instant separate reports

Separate Reports per Owner

Each co-owner has their own income and expense record, drawn from the same underlying transactions. Reports reflect each individual's share only, so there is no duplication and no risk of one owner's figures appearing in anothers.

HMRC MTD ITSA compliant

HMRC MTD ITSA Compliant

RentalBux is recognised by HMRC as MTD-compatible software. Each co-owner's quarterly update is prepared from their individual records and submitted to HMRC separately, in line with the requirements of Making Tax Digital for Income Tax Self Assessment."

Which Landlords Does This Apply To?

Whether you own property with a spouse, business partner, or family member - RentalBux splits income, expenses, and MTD submissions automatically.

Jointly Owned Property Between Spouses and Civil Partners

When married couples or civil partners own rental property jointly, HMRC's default position is that income and expenses are split equally for tax purposes, regardless of the actual ownership shares. This is set out in Section 836 of the Income Tax Act 2007. Where the property is held as tenants in common with genuinely unequal shares, couples can submit a Form 17 declaration to HMRC to be taxed in proportion to their actual ownership. RentalBux supports both arrangements. Set the ownership split that reflects your legal position and the software applies it to every transaction and quarterly submission.

Example: 2-bed flat
London, joint ownership
Structure: Joint ownership
Ownership: 50/50 (Form 17 optional)
Annual rent: £12,000
Husband 50%
Wife 50%
Husband
£6,000
Wife
£6,000
MTD status: Both submit quarterly

Co-ownership with a Business Associate

Where you co-own rental property with a business associate as tenants in common, each owner holds a defined share and is responsible for reporting their own portion of income and expenses to HMRC. Rather than each co-owner maintaining a separate record of the same property, RentalBux splits all income and expenses automatically based on the agreed ownership percentages. Each owner has their own accurate record to support their quarterly MTD updates and annual Self Assessment.

Example: 3-bed house
Manchester
Structure: Tenants in common
Ownership: 40/35/25 three-way
Annual rent: £24,000
Bob 40%
Harry 35%
David 25%
Bob (40%)
£9,600
Harry (35%)
£8,400
David (25%)
£6,000
MTD status: Each owner submits separately

Property Held with Family Members

Where rental property is held jointly with a parent, sibling or adult child, each co-owner must report their individual share of income and expenses to HMRC under Making Tax Digital for Income Tax Self Assessment. Managing this manually across multiple owners creates a significant risk of figures that do not agree. RentalBux divides income and expenses according to each person's ownership share, and each co-owner's quarterly updates are prepared from their own records, keeping everyone's submissions accurate and consistent.

Example: 3-bed flat
Birmingham
Structure: Joint ownership
Ownership: Parent, Daughter, Son
Annual rent: £18,000
Parent 50%
Daughter 30%
Son 20%
Parent (50%)
£9,000
Daughter (30%)
£5,400
Son (20%)
£3,600
MTD status: All three submit quarterly

How RentalBux Compares to
Other Solutions

See why landlords with joint ownership choose Rentalbux over other MTD software or spreadsheets.

Feature Spreadsheets Other MTD Software RentalBux
Automatic profit splits
Manual calculation required
Not supported or needs two accounts
Fully automated
MTD ITSA compliance
No integration
Compliant but not built for joint owners
Direct submission to HMRC
Separate reports for each owner
Manual export and formatting
Manual workarounds required
Generated automatically
Cost for joint owners
Free but high admin burden
Separate subscription per owner
One subscription, up to 3 owners
Audit trail and accuracy
Prone to errors
Accuracy depends on manual setup
Fully auditable and accurate

Start Free - See the Difference Yourself

Experience the power of automated profit splits and MTD-compliant reporting. No credit card required.

Frequently Asked Questions

Find answers to common questions about our product, services, and policies

How does RentalBux handle joint ownership?

RentalBux makes joint ownership simple. Set ownership percentages for each property once during setup, and the system automatically splits all rental income and expenses according to those percentages. Each co-owner gets their own accurate reports and separate MTD submissions — no manual calculations required.

Can I set different ownership splits for different properties?

Yes -each property in your portfolio can have its own ownership structure. You might own Property A 50:50 with your spouse, Property B 60:40 with a business partner and Property C 40:35:25 with two other investors. RentalBux tracks each property's ownership separately and calculates profit splits accordingly.

Does joint ownership work with foreign properties?

Yes. RentalBux handles joint ownership splits for both UK and overseas rental properties. Each co-owner receives their percentage share of foreign rental income and expenses, ensuring correct reporting to HMRC. Foreign property income is tracked separately for accurate tax reporting.

Can I add or remove a joint owner in RentalBux?

Yes. If your ownership structure changes — for example, you buy out a co-owner or add a new investor — you can update the ownership percentages in RentalBux at any time. The system will apply the new split to future transactions while preserving historical records.

How does RentalBux handle expenses paid by one joint owner?

If one co-owner pays an expense (e.g., repairs or insurance), RentalBux still allocates the deduction according to your ownership percentages. Each owner's report reflects their share of all income and expenses — regardless of who physically made the payment.

Is there a limit to how many properties can have joint ownership?

No. You can set up joint ownership on any number of properties in your RentalBux portfolio. Each property can have its own unique ownership structure and split percentages.

Can I use RentalBux if I own property with someone who isn't my spouse?

Yes. RentalBux supports joint ownership between any co-owners — spouses, civil partners, family members, friends, or business partners. Simply set your ownership percentages and RentalBux handles the rest.

Does joint ownership affect mortgage interest relief (Section 24)?

Yes. Section 24 restricts mortgage interest relief to the basic rate (20%) for individual landlords. Each co-owner receives their share of the restricted relief based on their ownership percentage. RentalBux calculates Section 24 adjustments automatically for each owner.

Still have questions?

Ready to Simplify Your Joint Ownership Accounting?

Join landlords who have automated their profit splits and MTD reporting with RentalBux. Start your free today — no credit card required.

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