Almost every public tender asks for the same core set of documents: proof of company registration, tax and social security clearance, recent financial statements, insurance certificates, comparable references, key CVs, relevant quality and environmental certifications, health and safety documentation, a declaration that no exclusion grounds apply, and evidence that the person signing is authorised to do so. Assemble that pack once, keep it current, and you can bid on anything that appears at short notice — which, given how many tenders close within a week, is most of them.
The point of the standing pack is not tidiness. It is that a tax clearance takes days to obtain and deadlines do not move. Suppliers lose opportunities they were perfectly qualified for because the paperwork could not be produced in time.
The standing pack
Company registration and legal identity
An extract from your national business register showing legal name, registration number, address, and legal representatives. Some buyers require an extract issued within the last three or six months, so treat this as a document to refresh rather than a document to file.
Tax and social security clearance
Certificates from the relevant authorities confirming no outstanding liabilities. Unpaid taxes or social contributions are a standard exclusion ground almost everywhere, and these certificates typically have the shortest validity in the entire pack. Know how long yours last and how long they take to obtain.
Financial statements
Usually the last two or three years of annual accounts, sometimes with a turnover threshold attached — a buyer may require annual turnover of a certain multiple of the contract value. Where you cannot meet a financial criterion alone, consortium bidding or relying on a parent company's capacity is normally permitted, but it has to be declared properly.
Insurance certificates
Professional indemnity, public or general liability, and employer's liability are the usual three, with sector-specific cover on top. Check both the required cover level and the policy expiry date; a certificate that expires before the contract ends invites a question you would rather not have to answer under time pressure.
Reference projects
Typically three comparable contracts from the last three to five years, with client name, contract value, dates, scope, and a contact who has agreed to be contacted. Keep these written up and refreshed continuously — reconstructing a reference from memory the week of a deadline produces vague text that scores badly.
CVs of key personnel
Named roles, qualifications, and relevant project experience, in the buyer's format if one is specified. Maintain a current CV for every person you routinely put forward so the bid becomes an editing job rather than a chasing job.
Certifications and accreditations
Quality management, environmental management, information security, and any licences your sector requires. Note the certificate expiry dates in the same calendar you use for insurance — an accreditation that lapses mid-tender is a mandatory requirement failed.
Health, safety, and policies
A health and safety policy and accident statistics are standard in works and services contracts. Increasingly buyers also ask for equality and diversity, data protection, anti-bribery, modern slavery, and environmental or social value policies. Write them properly once; they change rarely.
Declarations and authority to sign
A self-declaration that no exclusion grounds apply — in the EU commonly via the ESPD — plus evidence that the signatory can bind the company, such as a board resolution or power of attorney. Where a self-declaration is used, full evidence is usually required only from the winner, but it must exist at the moment you declare.
The tender-specific layer
On top of the standing pack, each tender adds its own documents: the completed tender forms, the pricing schedule in the buyer's exact format, the technical response or method statement, a delivery plan, sometimes a contract notice acknowledgement or a consortium agreement, and often a signed declaration of no conflict of interest. These are where the marks are — see how to write a winning response.
Format traps that disqualify good bids
- Signature type. Many portals require a qualified electronic signature, not a scanned image or a typed name. Find out which before the last day.
- File naming and structure. Some buyers prescribe exact file names and refuse anything else. It sounds petty; it is still enforced.
- File size and format limits. A 40 MB scanned appendix that will not upload at 23:50 has ended more bids than bad writing.
- Language and translation. Certificates issued in another language may need certified translation, which takes days.
- Validity dates. "Issued within the last three months" is measured against the submission date, not the date you downloaded it.
- Page and word limits. Excess content is often simply not read.
If you are bidding outside your home market
Cross-border bidding adds a predictable layer to the pack. Certificates issued by your national authorities may need certified translation, and some buyers require legalisation or an apostille — both of which are measured in weeks rather than days. You may need a local tax registration, a local representative, or proof that your professional qualifications are recognised in the buyer's country.
None of this is a reason to stay home; it is a reason to start earlier. Pick the one or two foreign markets you are serious about, obtain the translated and legalised versions of the core documents once, and keep them alongside the domestic pack. After that, a foreign tender costs you roughly what a domestic one does. Browsing a country page before you commit gives you a sense of the volume and the buyers in that market.
Keep the pack alive
Put every expiring document in a shared calendar with a reminder 30 days before it lapses: tax clearance, insurance, certifications, and register extracts. Review references and CVs quarterly. Assign one owner — a pack that belongs to everyone belongs to nobody, and you discover it has gone stale at exactly the wrong moment.
Requirements do vary by country and by buyer, so treat this as the base layer rather than the complete list, and always read the specific tender's instructions. If you want to test where you stand before committing to a bid, the tender readiness checker walks through the eligibility questions an evaluator will ask. Then browse open tenders and check your pack against a real requirement.