Sinking fund

A sinking fund, also called a reserve fund, is money collected from leaseholders and held in trust to pay for significant future works on a building, such as roof replacement, external redecoration, lift overhaul or communal heating systems, without raising large one-off demands at the point the work is needed. In the context of leasehold property in England and Wales, contributions are typically collected as part of the service charge in regular instalments, and the accumulated fund is drawn on when major expenditure arises. Under Section 42 of the Landlord and Tenant Act 1987, sinking fund contributions must be held in a separate trust account at a recognised financial institution, they belong to the leaseholders collectively and cannot be used for any other purpose or mixed with the landlord's own money.

Sinking fund vs reserve fund

The terms sinking fund and reserve fund are used interchangeably in most leases and by most managing agents in England and Wales. Some practitioners draw a technical distinction, treating the reserve fund as a general buffer for unexpected expenditure and the sinking fund as a fund designated for a specific future cost, but this distinction is not universally applied and the legal framework treats both in the same way under Section 42.

When a sinking fund can be collected

A landlord or managing agent can only collect sinking fund contributions if the lease expressly permits it. There is no statutory requirement for a residential block to maintain a sinking fund, it is a matter of lease drafting. Where the lease is silent, leaseholders cannot be required to contribute unless they agree to a variation. Most post-1980 residential leases do contain a reserve fund clause; older leases sometimes do not.

Where contributions are collected, they must satisfy the reasonableness test under Section 19 of the Landlord and Tenant Act 1985. No greater amount than is reasonable may be demanded before the relevant costs are incurred. This is the same reasonableness standard that applies to service charges generally.

How the fund must be held

The freeholder or their appointed managing agent is responsible for administering the fund, holding it in a designated trust account, and drawing on it when major works arise. The account must be separate from the landlord's own money, and any interest earned accrues for the benefit of the leaseholders, not the landlord. Leaseholders are entitled to request confirmation of the bank account details and the current balance. Failure to hold funds in trust as required by Section 42 is a criminal offence.

In our experience supporting landlords who own leasehold flats, the practical consequence of a poorly administered or under-funded sinking fund most often shows up when major works are needed and either the fund is insufficient or the freeholder cannot demonstrate proper trust account compliance, both of which can delay works and, where a landlord is letting out the flat, lead directly to disrepair issues affecting the tenant.

Section 20 consultation and the sinking fund

Even where a sinking fund exists and holds sufficient funds to cover major works, the Section 20 consultation process must still be followed if the cost of the works to any individual leaseholder will exceed £250. Section 20 of the Landlord and Tenant Act 1985 requires the freeholder to give notice to all leaseholders, invite observations on the proposed works and the contractors involved, and take those observations into account before proceeding. If the Section 20 process is not followed, the amount recoverable from each leaseholder is capped at £250 regardless of actual cost. The sinking fund and the Section 20 process are separate obligations.

What happens to contributions when you sell

Sinking fund contributions are not refundable to a leaseholder who sells their flat. The money belongs to the fund, not to the individual who paid in. On sale, the accumulated balance benefits the buyer and should be reflected in the property's marketability and, ideally, in the price. A depleted sinking fund, or a building with no reserve at all, is a financial risk that buyers' solicitors should flag during conveyancing. A healthy reserve fund balance is a positive signal of well-managed building maintenance.

For landlords letting out a leasehold flat

If you own a leasehold flat and let it to a tenant, your tenant does not pay sinking fund contributions directly. The contributions flow through your service charge, which affects your running costs, the building's condition, and ultimately your rental return. Where the freeholder delays essential works because the sinking fund is insufficient, the consequences can escalate into disrepair inside the flat, a roof leak causing damp and mould, for instance, which under the Renters' Rights Act 2025 can more readily become a tenant-facing complaint and a housing dispute. Keeping an eye on sinking fund adequacy is part of managing a leasehold investment properly.

Frequently asked questions

Is a sinking fund the same as a service charge? 

No, but it is collected as part of the service charge. The service charge covers the day-to-day running costs of a building, including cleaning, insurance, gardening, general maintenance. The sinking fund is the portion set aside specifically for major infrequent works. Both are governed by the Landlord and Tenant Act 1985, and both can be challenged at the First-tier Tribunal if the amounts are unreasonable.

Can leaseholders challenge sinking fund contributions? 

Yes. Contributions form part of the service charge and are subject to the reasonableness test under Section 19 of the Landlord and Tenant Act 1985. Any leaseholder who considers the contributions excessive or unjustified can apply to the First-tier Tribunal (Property Chamber) for a determination. A well-documented reserve fund study, setting out projected expenditure and the basis for contribution levels, is the managing agent's best protection against a successful challenge.

What should I check about the sinking fund when buying a leasehold flat? 

Ask your solicitor to obtain the current sinking fund balance, the most recent reserve fund study or building condition survey, and the last three years of service charge accounts. A healthy fund holds enough to cover at least the next major works cycle without a special levy. A very low balance, or a building with no formal reserve, should be reflected in the purchase price or may be reason to reconsider entirely. The Leasehold Advisory Service provides free guidance on leaseholder rights in relation to reserve funds.