Ground Rent Calculator

Ground rent is an annual charge paid by leaseholders to the freeholder. For most new residential long leases granted since 30 June 2022 (1 April 2023 for retirement homes), the Leasehold Reform (Ground Rent) Act 2022 caps ground rent at a peppercorn, which is effectively zero. Existing leases are unaffected and may still require ground rent, often with an escalation clause written into terms that few buyers read closely.

Common escalation patterns include fixed increases, such as doubling every 25 years, RPI-linked increases, or increases tied to a percentage of the property value. Doubling clauses cause the most trouble, because the growth is geometric rather than steady. A rent of £250 a year doubling every 25 years reaches £8,000 a year after 125 years, and the damage to the flat's saleability arrives long before that.

Enter your current ground rent, the escalation (fixed, doubling every 10, 15, 20, 25 or 33 years, an assumed RPI rate or a fixed percentage a year) and the years left on the lease, and the projection runs across the whole remaining term, showing the annual rent in each period and the cumulative cost. It also flags a ground rent above £250 a year (£1,000 in Greater London), the level at which a long lease on your only or main home can count as an assured tenancy under the Housing Act 1988, which gives the freeholder stronger possession rights if the rent falls into arrears.

Historically ground rent was nominal, £10-£50 a year on older leases, and nobody paid it much attention. Modern flats are a different matter, with rents often starting at £200-£500 a year and doubling every 10-25 years. Some clauses doubled every 10 years, which takes a £500 starting rent above £30k a year after 60 years and leaves the flat both unaffordable and unsellable. That is the toxic lease scandal of 2015-2022, which trapped thousands of UK buyers in properties nobody would take on.

Three patterns are worth hunting for in the lease. A doubling clause every 10 years takes £250 to £500 after 10 years, £1,000 after 20, £2,000 after 30 and £64,000 after 80. A review every 25 years to RPI is generally acceptable, since it tracks inflation, while an RPI review with a multiplier on top is not. A rent linked to 0.1-0.5% of property value climbs as the market climbs, sometimes faster than inflation. Solicitors should flag all of these, though many were missed during the 2015-2018 boom.

The 2022 Act does not reach everything. It leaves out leases granted before 30 June 2022, commercial property and community-led housing, which is why so many leaseholders still pay. In January 2026 the government proposed capping ground rent on existing leases at £250 a year, moving to a peppercorn after 40 years, to be included in a future Commonhold and Leasehold Reform Bill; that cap is a proposal, not law. The Leasehold and Freehold Reform Act 2024 contains a separate 0.1% cap, but it only limits the ground rent counted when valuing a lease extension or freehold purchase, and that part of the Act is not yet in force.

Several routes out exist in the meantime. A statutory lease extension adds 90+ years and cuts the rent to a peppercorn for good, at a cost of £8-£40k. A voluntary variation, where the freeholder agrees to reduce the rent, typically costs £2-£10k, and some freeholders will accept a one-off payment of £1,000-£5,000 to move to a peppercorn. Collective enfranchisement lets leaseholders buy the freehold together, while Right to Manage lets them take over the management of the building. Ground rent sits apart from the service charge, which covers shared building maintenance and is the only one subject to Section 20 consultation, and although ground rent rarely exceeds 1-5% of a leaseholder's annual cost, an onerous clause is the single biggest threat to a flat's value.