Rent-to-Rent Margin Calculator
Work out the margin on renting a property and letting it on, including bills, management and the occupancy needed to break even.
💼 Are you a real estate agent or broker? Send this calculator to your buyers on your own branded listing page — every enquiry comes straight to your WhatsApp. Create free agent page →Rent-to-rent means paying an owner a guaranteed rent and letting the property on for more, usually room by room. The operator takes the void and management risk in exchange for the spread, and the spread is thin enough that occupancy decides everything.
The number that matters is not the margin at full occupancy but the occupancy at which the margin disappears. Above it you make money; below it you are paying the owner out of your own pocket.
The calculation
Rent collected = rooms × room rent × occupancy. Costs are the guaranteed rent to the owner plus bills, cleaning, management and maintenance — all of which continue at full rate regardless of how many rooms are let. Break-even occupancy is total costs divided by the rent at full occupancy.
Worked example
Paying an owner 1,200 and letting five rooms at 500 gives 2,500 at full occupancy. At 90% you collect 2,250. Costs of 1,200 to the owner, 400 of bills, 250 of cleaning and management and 100 of maintenance total 1,950, leaving 300 a month — a 13.3% margin. Break-even occupancy is 78%, so two empty rooms wipes it out entirely.
Get the permissions in writing
Sub-letting usually requires the owner's written consent, and often the mortgage lender's and the insurer's too. Multi-occupancy licensing rules apply to the operator as much as the owner. Operating without these is a serious risk that no margin compensates for.
Turn a calculation into an enquiry
Buyers who run these numbers are ready to talk. Give every listing its own page with your photo, phone and WhatsApp on it — leads land straight on your phone.
Create your free property pageFrequently asked questions
Is rent-to-rent legal?
The structure itself generally is, provided the owner, their lender and their insurer all consent in writing and any local licensing is obtained. Doing it without those consents commonly breaches the head lease and can end the arrangement immediately.
Why would an owner agree?
For guaranteed rent with no voids, no management and no tenant contact. Owners who value certainty over maximum income, or who live far away, frequently find the trade worthwhile.
What is the main risk?
Occupancy. Costs are fixed and income is not, so the margin vanishes quickly when rooms sit empty. A break-even occupancy above about 80% leaves very little room for a bad quarter.