Public contract
A public contract is an agreement between a public buyer and a supplier for goods, services or works, for a price. Definition, rules, UK and Irish thresholds.
Updated on September 5, 2026
A public contract is a contract for the supply, for a price, of goods, services or works to a contracting authority: a government department, a council, an NHS body, a university, a police force or another body funded and controlled by the state. It is the main instrument of public procurement and the ordinary way a company sells to the public sector.
How it works
In England, Wales and Northern Ireland the Procurement Act 2023 defines a public contract in section 3 as a contract for the supply of goods, services or works to a contracting authority for pecuniary interest, whose estimated value reaches the applicable threshold and which is not exempt; frameworks and concession contracts count as public contracts too. Scotland keeps its own regime, built on the Public Contracts (Scotland) Regulations 2015 and the Procurement Reform (Scotland) Act 2014, and Ireland applies the EU directives through its 2016 regulations.
The Act sets objectives that apply whatever the value: value for money, maximising public benefit, transparency, and acting with integrity. Buyers must also have regard to the barriers that small and medium-sized firms face. So the buyer cannot simply pick a supplier: it defines its requirement, advertises in most cases, and compares tenders against criteria published in advance.
The procedure follows the estimated value of the whole requirement, extensions included. The Act applies in full from £135,018 including VAT for central government goods and services, £207,720 for councils and other sub-central bodies, and £5,193,000 for works (verified 2026-09-05); above those figures the buyer runs an above-threshold procedure, publishes on Find a Tender and observes an eight working day standstill before signing. Below them it runs a below-threshold procurement under lighter rules. In Ireland the EU thresholds apply: 140,000 euros for central government supplies and services, 216,000 euros for other authorities and 5,404,000 euros for works, excluding VAT. See procurement thresholds for the full picture.
A public contract differs from a concession, where the supplier is paid by exploiting the service and carries the demand risk, and from a grant, which pays for an activity rather than buying a deliverable.
What it means for a bidder
Public buyers are solvent customers, bound to pay within regulated terms, and they buy everything: cleaning, software, construction, training, consultancy. No licence or accreditation is needed to bid. You need to be up to date with tax, to hold the usual insurances, and not to be on the debarment list or otherwise excluded.
Start with contracts close to your skills and your area, typically below-threshold work or a single lot of a larger requirement. Register once on the central digital platform and on the portals that serve your region, then build a reusable bid pack: company details, accounts, insurance certificates, policies, case studies and CVs. After that, the work is monitoring notices and answering fast.
Example
A district council needs grounds maintenance for its parks and school grounds, estimated at £150,000 including VAT over three years. That is below the £207,720 threshold, so the council publishes a below-threshold tender notice on the central digital platform, where it appears on Contracts Finder, gives three weeks, scores price and method statement, and awards to a local landscaping firm with eight employees.
Frequently asked questions
Can a sole trader win a public contract?
Yes. Any economic operator can bid, whatever its legal form or size, alone or as part of a consortium.
Who counts as a public buyer?
Contracting authorities, meaning central government, councils, NHS bodies, schools, universities and similar public bodies, plus utilities operating water, energy or transport networks.
Is every public contract advertised?
No. Small purchases below the notification levels can be bought on quotes, and direct award is possible in limited cases set out in the legislation.