What is shared ownership?

Shared ownership lets you buy a share of a home (typically 25-75%) and pay rent on the rest to a housing association. You need a smaller mortgage and deposit than buying outright. You can buy more shares over time (staircasing) until you own the property outright.

Who is eligible for shared ownership?

You must have a household income of no more than £80,000 (£90,000 in London), be a first-time buyer (or previously owned a home but cannot afford to buy now), and be unable to buy a suitable home without assistance.

Shared Ownership Calculator

Calculate monthly costs of shared ownership including mortgage on your share and rent on the unsold share.

Last updated: April 2026 · Source: GOV.UK — Shared Ownership scheme

Full Property Price

Your Share (%)

Deposit

Mortgage Rate (%)

Term (years)

Rent on Unsold (%/yr)

Total Monthly Cost

£890.81

Mortgage: £375.19 + Rent: £515.63

Your Share (25%)

£75,000.00

Mortgage

£67,500.00

Unsold Share

£225,000.00

Annual Rent

£6,187.50

Disclaimer

This calculator is provided for informational purposes only and should not be considered as financial or tax advice. All calculations are performed locally in your browser — no personal data is collected or sent to our servers. Rates and thresholds are sourced from HMRC and GOV.UK and are updated for the current tax year. Always verify results with HMRC or consult a qualified professional before making financial decisions.

How It Works

Shared ownership lets you buy a share of a property (between 25% and 75%) and pay rent on the remaining share owned by a housing association. You need a mortgage only for the share you buy, plus a deposit on that share (typically 5-10% of the share value). This dramatically reduces the upfront cost compared to buying outright.

Monthly costs include your mortgage payment on the purchased share, rent to the housing association on the unowned share (typically 2.75% of its value per year), service charges and any ground rent. The rent portion usually increases annually by CPI + 1%, though newer leases may cap increases at CPI only.

This calculator breaks down all monthly costs for a shared ownership purchase. Enter the property value, the share you are buying, your deposit and the interest rate to see a full monthly cost comparison against renting or buying the whole property with a larger mortgage.

Example: £300,000 property, 40% share, 5% deposit on share

Share purchased: 40% of £300,000 = £120,000
Deposit (5% of share): £6,000
Mortgage: £114,000 at 4.5% over 25 years = £633/month
Rent on 60% (£180,000 at 2.75%): £412.50/month
Total monthly cost: £633 + £412.50 + £150 service charge = £1,195.50

Source: GOV.UK — Shared Ownership scheme

Frequently Asked Questions

What is shared ownership?: Shared ownership lets you buy a share of a home (typically 25-75%) and pay rent on the rest to a housing association. You need a smaller mortgage and deposit than buying outright. You can buy more shares over time (staircasing) until you own the property outright.
Who is eligible for shared ownership?: You must have a household income of no more than £80,000 (£90,000 in London), be a first-time buyer (or previously owned a home but cannot afford to buy now), and be unable to buy a suitable home without assistance.