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C40 CITIES CLIMATE LEADERSHIP

Registered charity 1173124 · accounts filings on the Charity Commission register · also known as C40 CITIES UK

C40 is a global network of nearly 100 mayors of the world's leading cities that are united in action to confront the climate crisis and create a future where everyone, everywhere can thrive.

Causes: General Charitable Purposes · Education/training · Environment/conservation/heritage · website · Get email alerts

Latest income
£15.9m
Latest spending
£14.4m
Registered
2017
Accounts read
FY2024

Financial health, per its FY2024 accounts

The accounts state that the charity incurred a net deficit of £0.3m in 2024, reducing its total reserves from £3.1m to £2.8m. Per the trustees' report, unrestricted reserves of £3.0m were held at year-end, which exceeds the board-approved policy target of approximately £1.0m. The trustees confirmed that the charity has sufficient funds to meet its liabilities as they fall due for at least 12 months from the date of approval.

Automated summary of the FY2024 accounts; the evidenced findings below carry the verbatim passages.

What the accounts disclose

Largest income source: C40 Cities Inc (99% of income)
“The grant income received from C40 Inc represents 99% of C40 Cities UK's total income.” — page 28
Per its FY2024 accounts as filed with the Charity Commission.
Reserves policy: £1.0m (held: £3.0m)
“Based on the 2025 budget, C40 Cities UK seeks to hold unrestricted (free) reserves in the region of £1.0m.” — page 9
Per its FY2024 accounts as filed with the Charity Commission.

Accounts audited by HaysMac LLP. Discloses 4 of 6 completeness components.

In the news

Recent coverage mentioning this charity by name (automated match; headlines belong to their publishers).

Corporate structure

Company officers (Companies House)

Current officers of the charity’s own company per the Companies House register, cross-checked against the Charity Commission trustee list by name. A director not on the trustee list is usually a timing or naming difference between the two registers — check both records before drawing conclusions.

Official officers record.

Structured financials (annual return, FY ending 31/12/2025)

Total income
£15.9m
Total spending
£14.4m
Reserves (reported)
£4.3m
Employees
161

Reported reserves equal ~3.6 months of spending — below the median for charities its size (median 4.6 months; benchmarks).

Per its annual return, largest income source: Donations and legacies (99% of income) — components as reported reconcile to the return’s total income; not from the accounts narrative.

Per its annual return, cost of raising funds: 0.0% of total income — below the median for charities its size (3.8%) (benchmarks).

Trustees · trustee networks

Trustee list from the Charity Commission register (current, not historical).

Operates in: Throughout England And Wales

Income and spending

Financial year endIncomeSpending
31/12/2025£15.9m£14.4m
31/12/2024£13.9m£14.2m
31/12/2023£13.0m£11.8m
31/12/2022£11.1m£10.0m
31/12/2021£8.5m£8.3m

Common questions

Is C40 CITIES CLIMATE LEADERSHIP financially healthy?

Per its FY2024 accounts: The accounts state that the charity incurred a net deficit of £0.3m in 2024, reducing its total reserves from £3.1m to £2.8m. Per the trustees' report, unrestricted reserves of £3.0m were held at year-end, which exceeds the board-approved policy target of approximately £1.0m. The trustees confirmed that the charity has sufficient funds to meet its liabilities as they fall due for at least 12 months from the date of approval. Its FY2024 accounts were audited by HaysMac LLP.

Funders of similar charities

Funders whose accounts show grants to charities similar to this one (and no recorded grant to this charity) — a starting list for fundraisers.

FunderSimilar charities fundedAmount to them
THE CLORE DUFFIELD FOUNDATION1£2.0m
JOHN LYON'S CHARITY1£60k
THE PWC FOUNDATION1£21k
THE FIDELITY UK FOUNDATION1£20k
THE MARCHUS TRUST1£5k
EAST END COMMUNITY FOUNDATION1£5k
The Lord Leonard and Lady Estelle Wolfson Foundation1£5k

Charities like this

Semantically similar by activities and financial character, from our analysed corpus. Compare with CITY TO CITY UK.

Side by side with its peers

CharityIncomeTop pay bandStaff >£60kReserves vs policyFundraising costGoing concern
C40 CITIES CLIMATE LEADERSHIP£15.9m——unclear—no doubt
CITY TO CITY UK FY2025£377k£70,001 - £80,0001below—no doubt
Open City FY2025£1.1m—0below—no doubt
THE CLIMATE CHANGE ORGANISATION FY2025£16.8m——below—no doubt
Global Leadership Network UK FY2025£106k—0unclear—no doubt
THE CAYO FOUNDATION FY2025£400k—0above—no doubt

Each row is that charity’s latest analysed filing; every value is quote-backed on its own page.