Shared ownership vs Help to Buy: which route fits?

Shared ownership and Help to Buy are not direct like-for-like schemes in the facts provided here, so the comparison is necessarily narrow. The verified material covers shared ownership in detail, plus Help to Buy ISA savings and one point on Help to Buy equity loans, rather than a full current Help to Buy purchase scheme. On that basis, this guide sets out what the evidence does show on eligibility, deposits, SDLT and practical fit.

The schemes at a glance

Shared ownership lets eligible buyers purchase a share of a home and pay rent on the rest, with staircasing meaning you can buy more shares later and the rent falling as your share rises. Eligibility includes household income of £80,000 or less, or £90,000 or less in London, and being unable to afford the deposit and mortgage for a suitable home. Buyers can usually staircase by 10% or more, though some older leases only allow 25% or more and some newer leases allow 5% or more; homes bought on or after 1 April 2021 may also allow 1% shares each year for the first 15 years. By contrast, the verified Help to Buy facts here are about the Help to Buy ISA, which is closed to new accounts, and about EWS1 forms that may be needed when repaying a Help to Buy equity loan or remortgaging.

Costs and deposits compared

The deposit on a home purchase is often 10% of the purchase price, though it can vary, and it is paid at exchange of contracts; after exchange the deal is legally binding and pulling out can mean losing the deposit and paying other legal costs. For shared ownership, extra costs can arise when staircasing: buying shares of 5% or more needs a valuation by a RICS-registered surveyor, the landlord may charge an administration fee of around £150 to £500, and buyers pay their own legal fees. A Lifetime ISA can add a 25% government bonus of up to £1,000 a year on savings up to £4,000 a year, subject to the stated age and property-price limits, while existing Help to Buy ISA savers can still pay in up to £200 a month and claim a 25% bonus up to £3,000 within the published deadlines.

Who each scheme suits

On the evidence provided, shared ownership is aimed at households within the income caps who cannot afford the deposit and mortgage for a suitable home, and it may suit buyers who want to start with a smaller share and increase it over time. Most shared ownership homes can be staircased to 100%, but the cap is up to 80% in designated protected areas and 75% for Older Persons Shared Ownership homes. Editorially, that makes shared ownership look more flexible for buyers who need a lower starting point, while the Help to Buy ISA and Lifetime ISA facts point more to savings support than to a separate purchase route in their own right.

The SDLT angle

For shared ownership, SDLT is worked out each time you buy a share and the transactions count as linked transactions. First-time buyers of a shared ownership property can claim relief where the market value is £500,000 or less, whether they choose a market value election or pay in stages, and the relief also covers the rent. No equivalent SDLT treatment for a Help to Buy purchase route is set out in the verified facts supplied here.

Making the choice

If you are weighing these options strictly from the facts here, the main decision is between a part-buy, part-rent model with ongoing staircasing rules and costs, and savings products that can boost a deposit if you meet their conditions. Shared ownership also needs close attention to lease terms, because leasehold means ownership lasts for a fixed period and, once a lease has 80 years or less left, extension costs rise significantly under current law. A practical point for any purchase is that either side can walk away before exchange, but after exchange the contract is binding.

Key facts

Source: GOV.UK - Shared ownership: buying more shares (staircasing) — Guidance checked August 2026

Source: GOV.UK - Shared ownership: buying more shares (staircasing) — Guidance checked August 2026

Source: GOV.UK - Shared ownership: who can apply — Guidance checked August 2026

Source: GOV.UK - Right to Shared Ownership — Guidance checked August 2026