General education for business planning. Apply the current rules to your actual property and arrangement; professional checks and legal procedures remain your responsibility.
The margin is more than the difference between two rents
Your business earns a margin when rental income exceeds the rent promised to the owner and the costs of running the property. If the owner receives £1,400 and the rooms could earn £3,000, the £1,600 difference is not your profit. Bills, repairs, empty rooms, insurance, advertising and your time still need paying.
Use achieved rents for comparable properties, not the highest advertised room in the area. Include rent-free launch time and arrears. A fully occupied property can still lose money if its fixed costs are too high.
A worked monthly example
Illustrative figures: five rooms at £600 give £3,000 at full occupancy. At 90% assumed occupancy and collection, effective income is £2,700. Deduct £1,400 owner rent, £450 bills, £200 other costs and £150 repair reserve: the estimated monthly surplus is £500 before tax, financing, startup-cost recovery and owner remuneration.
With those same £2,200 costs, break-even occupancy is 73.3%. At 75%, the surplus falls to £50. One completely empty room leaves 80% of maximum income before any other missed payments. Small changes can absorb most of the margin.
Stress-test before committing
Test a lower achievable rent, two empty rooms, higher energy costs and one major repair. Calculate the cash needed to continue paying the owner while income is delayed. A paper surplus does not pay a bill when tenant receipts arrive late.
Use the calculator below as a screening tool. It assumes equal room rents and combines occupancy and collection into one rate. Replace the numbers with property-specific evidence and prepare a detailed business budget before signing.
Measure performance after launch
Review rent earned, money received and unpaid balances separately each month. Compare actual costs with your budget and investigate recurring gaps. Deposits are held for their legal purpose and must not be used to make an unprofitable deal look profitable.
The CRM helps monitor live operations; it does not predict demand, guarantee returns or prepare your formal tax accounts.
Rent to rent profit calculator
Change the example figures to test monthly surplus and break-even. Use one combined occupancy and collection rate; units are assumed to have the same rent.
- Effective monthly income
- £2,700
- Costs including repair reserve
- £2,200
- Break-even occupancy / collection
- 73.3%
- Surplus if the rate falls 15 percentage points
- £50
Illustration only. Surplus is after the reserve you enter but before tax, financing, startup-cost recovery and any unpaid owner labour. Add management pay, insurance, software and other running costs to your budget. The calculator is not a forecast or formal accounting report. Your entries stay in this page and are not submitted to us.