Contract end dates as timing: when a buyer and its supplier are about to talk again

Award notices record contract durations and renewals; count back from the end date to see when a buyer will re-tender and its supplier will need an edge.

Tomasz Kowal · Data and public procurement

Updated 16 October 2026 · 6 min read

A public contract has a start, an end and, often, a fixed number of renewals, and all three are written into the award notice. That makes public supply one of the few markets where an outsider can know, a year in advance, when a buyer and its current supplier will reopen the question of what to buy and from whom. A manufacturer is not going to bid; it needs its distributor to be ready on that date with something better than last time.

Putting it simply: the end date in a notice minus the time a buyer needs to run a new procedure is the window in which the incumbent supplier is looking for an edge and its rivals are looking for a way in. That is when a new manufacturer in the distributor's range is most welcome, and when you should be talking.

Where the dates are

Since eForms became mandatory in October 2023, duration is structured data. The business terms are:

  • Duration Start Date (BT-536) and Duration End Date (BT-537), or a Duration Period (BT-36) such as "48 months";
  • Renewal Maximum (BT-58), the maximum number of times the contract may be renewed, with a Renewal Description (BT-57);
  • Contract Conclusion Date (BT-145) and Winner Decision Date (BT-1451).

Two legal limits frame them. A contract award notice must be sent "not later than 30 days after the conclusion of a contract or of a framework agreement" (Article 50(1) of Directive 2014/24/EU), so a published notice is at most about a month old when it appears. And a framework agreement's term "shall not exceed four years, save in exceptional cases duly justified" (Article 33(1)), so a framework award without an explicit end date still has one (eight years for water, energy, transport and postal buyers under Directive 2014/25/EU, Article 51(1)).

Turning an end date into a window

A buyer that wants a new supplier in place on the day the old contract ends has to finish a procedure before then. For an open procedure, the minimum time for receiving tenders is 35 days from dispatch of the contract notice (Article 27(1)); it can be cut to 15 days where a prior information notice was published between 35 days and 12 months earlier (Article 27(2)). Before the notice, the buyer writes specifications and gets approval; after the deadline, it evaluates, awards, observes standstill and signs. The whole cycle takes months, and a well-run buyer starts planning well before that.

So the useful arithmetic is:

  1. Take the end date, or the start date plus the duration.
  2. If renewals are allowed, assume the buyer may use them; the "real" end is the end date plus the renewal periods, and the decision not to renew is itself a signal.
  3. Count back from the earliest plausible end. The months before it are the window in which specifications are being written and suppliers are being sounded out.
  4. Watch for a prior information notice from the same buyer under Article 48: buyers may announce planned procurement up to 12 months ahead, and that notice is the clearest confirmation the window is open.

What the window means for each party

For the buyer, it is the moment to fix what went wrong last time: a product that failed, delivery problems, a price that drifted. Buyers write those lessons into the next specification.

For the incumbent supplier, it is a defence. It will try to meet the new specification with its existing range, and if its range cannot, it will look for a manufacturer whose products can.

For the rival distributors who lost last time or did not bid, it is the one chance in four years, and a new manufacturer with a product the incumbent does not carry is one of the cheapest ways to differentiate a bid.

A manufacturer entering the market sits on the supply side of all three. It cannot change the specification and it will not bid, but it can put the product in the distributor's hands early enough to be in the bid.

What a manufacturer can actually do with a date

  • Time the approach. Contact the distributors active in that category six to twelve months before the earliest plausible end, not after the new award is published. By then the range is fixed for another term.
  • Bring the specification arguments. The distributor's bid will be judged on the buyer's criteria. Certificates, test reports, environmental labels and after-sales commitments are what let a distributor score points with your product; send them, not a brochure.
  • Offer samples for evaluation. Buyers often inspect samples during evaluation. A distributor that can show your product beats one that can only describe it.
  • Prefer the challenger when the incumbent is comfortable. An incumbent with a single-supplier contract and no competition reopened has little reason to add you until the window. A distributor that lost the last award has a reason now.
  • Follow the framework structure. Under a multi-supplier framework with reopened competition (Article 33(4)), call-offs are contested throughout the term, so the window is permanent and the first order could come at any time.

Caveats

The end date may not be the end. Article 72(1)(a) allows modifications of any value where they were provided for in the original procurement documents through "clear, precise and unequivocal review clauses" or options; a contract with options can be extended without a new procedure. Article 72(2) also allows modifications below the EU thresholds and below 10 per cent of the initial value for supply and service contracts (15 per cent for works) without a new procedure, as long as the overall nature of the contract does not change.

Dates are not always filled in. Not every notice carries a start and end date; some give only a period, some nothing. Where the field is empty, a framework's four-year maximum (eight for utilities) is the fallback, not a fact.

A framework end is not a call-off end. Individual call-offs can run past the framework's end; the framework end date tells you when the qualification is redone, not when a specific delivery stops.

The buyer may not re-tender the same thing. The next procedure may use a different CPV code, be split differently, be bundled into a works contract, or fall below the threshold and never appear on TED. The window is a probability, not an appointment.

The notice is a month behind. With a 30-day publication deadline, the contract has already been running for weeks when you read about it. Count from the conclusion date, not from the day you found the notice.

What this means for a manufacturer

Read the dates as a calendar, not as history. Every award notice in your category is also a forecast: this buyer and this supplier will talk again around this date, and the distributors around them will be looking for an edge in the months before. Plan your outreach to each distributor around the windows that matter to it, bring the material its bid will be judged on, and let the distributor do the bidding. In Cresques, the contract durations kept with each award notice are there for exactly this reading; alerts on approaching windows are on the roadmap but not available yet.

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