Free Guide: Windsor and Maidenhead Spending & Supplier Profile
A free spending & supplier guide for Royal Borough of Windsor and Maidenhead · Unitary authority · South East
Data covering 2022 to 2026
Recorded Spend
£703.3m
Transactions
48,037
Suppliers
1,365
Key Takeaways
- £703 million in recorded spend across 48,037 transactions from 2022 to 2026
- 59.7% of matched spend goes to just five suppliers, led by Achieving for Children
- 14 tenders worth £68.7 million published, with construction and professional services dominant
How big a buyer is Windsor and Maidenhead?
For a unitary authority covering 76 square miles and around 151,000 people, Windsor and Maidenhead moves serious money. Our data shows £703 million in recorded spend across 48,037 transactions from 2022 to 2026, drawn from 8 source files. That works out at roughly £176 million a year, which puts this borough firmly in the mid-tier of English unitaries as a purchasing organisation. The data comes from two sources: the council's own website and Find a Tender, collected up to November 2025. Across those records we've matched 1,385 suppliers to Companies House entries, giving us a solid read on who's getting paid. One thing to keep in mind: the 13 published contracts carry no recorded contract value, so the transaction-level spend data is doing the heavy lifting here. If you're sizing up this council, the payment records are where the real picture sits.
One supplier dominates, and it's not a private firm
Achieving for Children, a community interest company, accounts for £137 million of the spend we've tracked. That single supplier pulls in roughly 19.5% of all recorded spend, and it's classified under public administration rather than children's services. VolkerHighways follows at £34.7 million, then Serco at £19 million. Between them, the top five identified suppliers absorb 59.7% of matched spend, and the top ten take 64.8%. The HHI sits at 1,800, which is moderately concentrated. Construction is the busiest sector by supplier count, with 108 identified firms sharing £49.5 million. But the biggest spend category is public administration at £141 million across just 8 suppliers. Professional and technical services (181 suppliers, £25.5 million) and admin support (154 suppliers, £21.2 million) round out the more competitive sectors. If you're in construction or professional services, there are a lot of firms already in the mix.
What does the tender pipeline actually look like?
Windsor and Maidenhead has published 14 tenders worth a combined £68.7 million. That's a modest pipeline, and the contract register is thin too, with 13 contracts listed but no values attached to them. The procurement method breakdown isn't available in our data, so we can't tell you the split between open competition and direct awards. What we can see from the tender values is that a few large opportunities make up the bulk of that £68.7 million. The council sources from both rbwm.gov.uk and Find a Tender, which means opportunities appear in both local and national channels. With 21 different sectors represented in the spending data and 1,365 identified suppliers on the books, this is a council that buys widely even if the formal procurement pipeline looks quiet. The gap between the volume of day-to-day payments and the small number of published tenders is something bid managers working this area will want to keep an eye on.
| # | Supplier | Spend |
|---|---|---|
| 1 | ACHIEVING FOR CHILDREN COMMUNITY INTEREST COMPANY | £137,086,678 |
| 2 | VOLKERHIGHWAYS LIMITED | £34,731,066 |
| 3 | SERCO LIMITED | £19,038,681 |
| 4 | TIVOLI GROUP LIMITED | £5,579,079 |
| 5 | EDF ENERGY CUSTOMERS LIMITED | £5,262,274 |
| 6 | THAMES VALLEY BUSES LIMITED | £4,229,952 |
| 7 | NSL LIMITED | £4,123,196 |
| 8 | COST AND CONSTRUCTION MANAGEMENT LIMITED | £3,511,822 |
| 9 | N&P CRAYFORD MRF LIMITED | £2,767,366 |
| 10 | PROJECT CENTRE LIMITED | £2,767,105 |
About Us
CouncilLedger brings together spending records, contract awards, and tender notices from over 400 UK local authorities into one procurement intelligence platform. Our data covers 16 years of transactions, collected directly from council transparency publications and government procurement platforms. Search suppliers, track spending trends, discover tender opportunities, and monitor the contracts that matter to your business.
