Skip to main content

Rent-to-Rent Calculator

Model a UK rent-to-rent HMO: the most you can afford to pay the landlord, what the rooms bring in after bills and fees, how long it takes to get your set-up money back, and the return over the length of the contract.

By Alex Abazov, founder of ADVESTOR · Updated · Rates last verified August 2026

Run a quick version free right here. The full calculator is included in Monthly (£5/month) and Lifetime (£97 one-off). Buy-to-let and stamp duty calculators are free.

Run your numbers

Share of the year rooms are let. 95% means about 18 empty days per room.

Furniture, legals and other set-up costs keep their usual values.

Need every input? Open the full calculator

Net profit PCM

£461

£5,528 per year

ROI on set-up

35.2%

Annual profit on cash put in

On these numbers you'd make £461 a month after bills and the landlord's rent, and get your set-up cash back in 34.1 months.

Full breakdown
  • Line-by-line monthly costs
  • Payback period
  • Downloadable PDF
  • Return over the contract

We'll email you a secure link to open your breakdown and PDF. This creates a free ADVESTOR account, no password needed. See our Privacy Policy.

Example (default inputs)
Example deal

Net cashflow PCM

£461

£5,528 per year

Months to get funds out

35 months

On a 36-month contract

ROCE

35.21%

Total cash needed

£15,700

Including £1,200 deposit to the landlord

5 rooms at £550 per room, 95% occupancy, £1,200/month rent to the landlord on a 36-month contract, bills of £560/month, £14,500 of set-up costs.

What it works out

Maximum rent to offer
Working back from room income, bills, fees and your target profit to the highest rent you can pay the landlord.
Net cashflow per month
Room income after voids, less bills, percentage costs and the rent to the landlord.
Total cash needed
The landlord's deposit plus legal, agent, refurb, furniture, dressing, photography and empty-period costs.
Months to get funds out
How long the monthly profit takes to repay your set-up cash.
Return over the contract
Total profit over the contract term, and the return including the deposit coming back at the end.

What you enter

  • Rooms, rent per room and bills per room for the quick maximum-rent check
  • Rent and deposit to the landlord and the contract length
  • Number of rooms, rent per room, occupancy and other income
  • Contracts, legal and agent fees
  • Refurb, furniture, dressing, photography and holding costs before the rooms are let
  • Bills line by line, management and other percentage costs

How rent-to-rent works

In a rent-to-rent deal you take on a property from a landlord for a fixed rent over an agreed term, often several years, and let it out yourself, typically room by room as an HMO. Your profit is the gap between what the rooms bring in and what you pay the landlord plus the bills and running costs.

You don't buy the property, so there's no mortgage or stamp duty, but you do put cash in: a deposit to the landlord, legal fees, furniture and often some refurbishment. The contract length matters as much as the monthly profit, because that cash has to come back before the agreement ends.

Work out the maximum rent before you negotiate

The quick maximum-rent check works backwards: potential room income, less bills per room, less management and other percentage costs, less the monthly profit you want to make. What remains is the most you can pay the landlord and still hit your target. Knowing that number before you sit down with a landlord stops you agreeing a rent the deal can't support.

Payback and return over the contract

Because you don't own the asset, the return on a rent-to-rent deal is best judged over the contract. The calculator shows how many months of profit it takes to repay your set-up cash, the total profit over the term, and the return including the landlord's deposit coming back at the end.

If the payback period is close to the length of the contract, a few slow months or an unexpected bill can wipe out the whole return. Look for deals where the set-up cash comes back well before the agreement ends.

Compliance and agreements

Make sure the agreement with the landlord clearly permits you to sublet, and that the landlord's mortgage and any lease allow it. HMO licensing, safety certificates and repairs responsibilities need to be agreed in writing, and if you manage the property for the owner you may need to belong to a property redress scheme. Take legal advice on the contract before you sign.

Rent-to-Rent Calculator: common questions

Related tools

Figures are estimates, not financial advice. Rates last verified August 2026.

Run your own numbers

Put your own deal through the Rent-to-Rent calculator, then save it and move on to the next one.

Run a quick version free right here. The full calculator is included in Monthly (£5/month) and Lifetime (£97 one-off). Buy-to-let and stamp duty calculators are free.