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Free lease-share tool

How is your share of a cost worked out?

Keep the lease wording, the cost schedule and your calculation together. Enter a stated percentage or fraction, or record the information you still need.

A person checking a service charge total with a calculator
Start with the lease. Keep the arithmetic tied to the right cost.

Your evidence

One cost schedule at a time.

Use your own lease and any relevant variation. Leave names, addresses and other people's details out of the short extract.

Different costs may use different shares. Do not combine schedules unless the lease supports it.

Use the total for this cost or schedule before applying your share. Leave it blank if unknown. Zero means a known cost of £0.

These entries stay in this tab and are not sent to building trust or saved by this tool. Refreshing or closing the page may clear them. A copy you download is yours to manage. Privacy details.

Your result

The wording comes first.

Choose what you found to get one of four outcomes: fixed share, formula or basis, more information required, or no clear wording found.

Copy into LEASE-iQ

How does my lease work out my share?

  1. Copy the question below.
  2. Open LEASE-iQ and choose your uploaded lease.
  3. Paste the question, then check the clauses and pages in the answer.
Open LEASE-iQ ↗

New to LEASE-iQ? One residential lease is free, with no one-month limit. Request free access ↗ first; after confirmation, follow the secure upload instructions for your signed lease.

The question includes the entries you add to this worksheet. Check them before copying. Nothing is sent automatically.

Choose a question for another issue →

What to check next

Why the number is only part of the check.

01

Which costs does the share cover?

Match the wording to the schedule behind the bill. Keep building, estate, insurance and other categories separate where the lease does.

02

Is the basis complete?

A lease may state a percentage, a fraction or another way of allocating costs. If it uses a formula or a “fair proportion”, ask for the calculation and supporting basis.

03

What is still missing?

Check the relevant lease pages, any variation and the cost breakdown. No clear wording found means more investigation is needed; it is not a conclusion that nothing is owed.

For residential leasehold service charges in England and Wales. Guidance checked 9 October 2026: LEASE: how service charges are calculated and what service charges cover.