Build a complete monthly rent allocation for every housemate. Compare equal, income-weighted, room-value and blended methods, then check that the shares reconcile exactly to the full rent.

FigurePath renting tool

Rent Split Calculator

Your figures stay in your browser. No sign-up required.

This is an estimate, not a referencing decision or legal or financial advice. Letting agents and landlords set their own affordability criteria. England-specific deposit rules are identified clearly.

What this calculator does differently

FigurePath calculates the whole household allocation, not just one person’s share. Enter between two and eight housemates and the result shows every percentage and monthly amount in one table. Penny rounding is reconciled automatically, so the final amounts always add back to the exact rent.

Use labels such as “Person 1”, “Large room” or initials rather than full names if you intend to copy the result link. Calculator figures stay in your browser, but a copied link contains the scenario values needed to reopen it.

Choose a rent-splitting method

Method	How it works	When it may be useful
Equal	Everyone pays the same amount.	Rooms and circumstances are broadly similar, or simplicity matters most.
By income	Each person pays the same proportion of the rent as their proportion of combined income.	The household wants the lower earner to carry a smaller cash amount.
By room value	Each room receives an agreed relative weight.	Rooms differ in size, privacy, storage, en-suite access or another exclusive benefit.
Blended	Income and room-value shares are combined using an adjustable percentage.	The household wants to recognise both ability to pay and differences between rooms.

No method is automatically fair. The right choice is the one every housemate understands and freely agrees after seeing the full allocation.

Formulas and rounding

Equal share: total monthly rent ÷ number of housemates.
Income share: total monthly rent × (individual income ÷ combined income).
Room share: total monthly rent × (individual room weight ÷ combined room weights).
Blended share: the chosen income percentage × income share, plus the remaining percentage × room share.

The calculator first works out exact proportions, converts the rent to pennies, then distributes any leftover pennies to the largest fractional remainders. If two remainders are equal, the earlier listed housemate receives the penny first. This deterministic method prevents a rounded total that is a few pence above or below the rent.

Worked examples

Example 1: £1,000 split equally between three people

An exact third of £1,000 cannot be expressed in whole pennies. FigurePath allocates £333.34 to Person 1 and £333.33 each to Persons 2 and 3. The displayed total remains exactly £1,000.

Example 2: £1,800 split by income

Three housemates earn £30,000, £60,000 and £90,000. Their income proportions are 16.67%, 33.33% and 50%. The calculator allocates £300, £600 and £900 respectively.

Example 3: £2,000 split by room value

The housemates agree room weights of 1, 1.2 and 1.8, giving a combined weight of 4. The resulting shares are 25%, 30% and 45%, so the monthly amounts are £500, £600 and £900.

Example 4: blend income and room value equally

Using the income and room figures from Examples 2 and 3 with a 50:50 blend produces £416.67, £633.33 and £950 of a £2,000 rent. Move the income-influence control to test a different agreement.

How to agree room-value weights

Start every standard room at 1. Increase or reduce a weight only for features the household agrees matter. For example, a larger en-suite room might receive 1.3 while a smaller box room receives 0.8. The numbers are relative: weights of 1, 1.2 and 1.8 produce the same proportions as 10, 12 and 18.

Discuss room size, natural light, storage, privacy, en-suite access, parking or exclusive outdoor space. Avoid inventing false precision. A simple agreed adjustment is usually easier to explain and revisit.

Rent shares and legal liability are different

This result is a private budgeting arrangement. It does not amend the tenancy agreement. Joint tenants can be jointly and severally liable, which may allow the landlord to pursue one tenant for more than that person’s privately agreed share. Read the proposed agreement and obtain advice if the liability is unclear.

Record the chosen method, monthly amounts, rounding penny and what happens if income changes or a housemate leaves. Everyone should keep a copy.

Costs not included automatically

Council Tax, including student exemptions or single-person discounts.
Gas, electricity, water and broadband.
Parking, cleaning and shared subscriptions.
Tenancy deposits, holding deposits and other moving costs.

Bills do not have to follow the rent method. A household might weight rent by rooms while splitting usage-based bills equally. Agree each category separately.

Splitting bills differently from rent

Many households split rent by income or room size but divide broadband equally, and pay an estimated amount for energy and water each month before squaring up against the actual bills. Keep Council Tax on its own line and check who is legally responsible for it. A private arrangement does not change a tenancy or a supplier contract.

The step people often miss is settling up. If one person pays the landlord and another pays the bills, work out each person’s total share, compare it with what they actually paid, and make one transfer.

Example (fictional): A and B agree to pay £500 and £700 of £1,200 rent, and to split £300 of bills equally, £150 each. A pays the landlord £1,200 and B pays the £300 of bills. A’s total share is £650 but A has paid £1,200, so B sends A £550. After that, A has paid £650 and B £850, and nothing is counted twice.

When a housemate’s income changes

If you split by income and someone’s pay changes, run the calculator again with the new figures. Keep the old split visible, and agree the first rent date the new split applies to before anyone changes their payment.

Example (fictional): A and B split £1,500 rent by income. On £36,000 and £24,000 that is £900 and £600. B’s income falls to £18,000, so the recalculated split is £1,000 and £500. The household might instead agree an interim split, such as £950 and £550 for two rent dates, then review. A new split is something to agree, not an entitlement: the real question is whether A can carry the change and B can pay the rest.

Whatever you agree between yourselves, joint tenants can still be responsible for the whole rent (see the liability section above). If someone cannot pay their share, talk before the rent is due and get housing or debt advice.

Frequently asked questions

Should couples count as one housemate or two?

There is no universal answer. Count contributors in the way that matches the agreement being tested, then inspect the complete result. Couples may decide to use two income entries but one combined room weight, or agree another transparent approach.

Should we use gross or take-home income?

Use the same basis for everyone. Gross annual income is easier to evidence; take-home income may better reflect available cash. If tax, pensions or deductions differ substantially, compare both scenarios before agreeing.

What if someone’s income changes?

Decide in advance whether the allocation is fixed for the tenancy or reviewed on an agreed date. Do not change a person’s payment retrospectively without agreement.

Can I share or print the result?

Yes. “Copy result link” restores the complete scenario, and “Print result” produces a clean allocation. Avoid using full names or sharing a link if you consider the entered figures private.

Questions people ask

Sources and review

Calculation version: 1.3.0
Content reviewed: 20 July 2026

FigurePath provides a budgeting calculation. It does not amend a tenancy agreement, determine legal liability or decide what arrangement is fair.

Rent Split Calculator UK