Shared ownership means a mortgage on the share you buy plus subsidised rent on the rest. Enter the full value, your share and the terms to see your real total monthly cost.
Share · mortgage · rent · service charge
Shared ownership lets you buy a share of a home — usually between 10% and 75% — and pay subsidised rent on the rest to a housing association. Your monthly outgoing therefore has three parts: a mortgage on the share you own, rent on the share you don't, and a service charge. It's a popular route onto the ladder with a much smaller deposit.
| Component | Based on |
|---|---|
| Mortgage | Share value − your deposit |
| Rent | ~2.75% a year of the unsold share |
| Service charge | Building & estate upkeep |
Over time you can buy extra shares — known as staircasing — usually up to 100%, at which point you own the home outright and pay no more rent. Each additional share is bought at the property's current market value, so staircasing in a rising market costs more. Model the bigger mortgage on a larger share with the mortgage calculator.
Rent and service charges typically rise each year, and you're responsible for repairs even on the part you don't own. Make sure the total is affordable now and with future increases. See how it fits your wider budget alongside your take-home pay and mortgage affordability.
It's the mortgage on your share, plus rent on the unsold share (about 2.75%/year of its value), plus a service charge — combined into one monthly cost.
Rent is typically about 2.75% a year of the unsold share's value. On a £300,000 home with 40% bought, that's roughly £412/month on the unsold 60%.
Staircasing means buying more shares at the current market value. The more you own, the less rent you pay — and at 100% you own it outright.
You can pay it in stages or on the full value upfront, and first-time buyers often get relief — so little or no Stamp Duty may be due on smaller shares.
