Delta eSourcing: what suppliers need to know

Delta eSourcing is an e-tendering system that buyers such as the Competition and Markets Authority use: its procurement page says “We use Delta eSourcing to manage our tendering activities.” Delta’s own FAQ says supplier registration is free. TenderWorthy does not ingest Delta.

This guide covers the facts we could source about registering and invitations, and whether a Delta tender will also be on Find a Tender. We reviewed Delta’s FAQ on 12 October 2026.

What TenderWorthy covers

TenderWorthy is an independent service. We are not part of Delta eSourcing, and we have no link with any buyer that uses it.

We take notices from two places only: Find a Tender and Contracts Finder. We do not ingest Delta eSourcing. A tender run on Delta appears in our list only where the buyer has also published it on Find a Tender or Contracts Finder.

So anything Delta-related we show you is possibly only part of what a buyer runs. Our portals comparison shows what each UK portal holds and which ones we watch. Browse the tenders we cover to see what is in our list today.

What Delta eSourcing is

Delta is a system that buyers use to run their tenders. The CMA’s page names it as the system it uses “to manage our tendering activities”.

Don’t assume one buyer’s instructions apply to every Delta tender; each buyer sets its own. Our South East tenders page lists the local portals councils there use.

Delta’s FAQ also says notices are advertised via BiP Solutions. We haven’t checked what that involves in practice. We have not repeated any figures for how many buyers or suppliers use it, because we have no logged source for them.

Not assessed: check the portal’s own help pages for anything else about how Delta looks or behaves.

Registering as a supplier

Delta’s FAQ (fetched 12 October 2026) says supplier registration is free. That is the one cost fact we can source.

We have not recorded the sign-up steps, the fields it asks for, any approval step, how long it takes or whether one login works across buyer-branded portals. Not assessed: check the portal’s own help pages. Treat any step-by-step you find on a third-party site, including this one, as secondary to the portal itself.

Registering on Delta is separate from registering on the Central Digital Platform, the government system behind Find a Tender. gov.uk’s supplier guide says you only need to do that when you want to bid. Our guide explains how to register on the Central Digital Platform.

Finding opportunities and invitations

Delta’s FAQ (as logged on 12 October 2026) describes two things that matter to a supplier. This is our summary, not Delta’s wording:

• Buyers search the SID, the supplier information database, and invite suppliers to their lists.
• Invitations arrive in Response Manager.

We have not logged how the SID is searched, which profile fields buyers see, or how public opportunities are listed. Not assessed: check the portal’s own help pages.

On alerts: the Delta page we reviewed does not describe a supplier alert or notification feature, so we make no claim either way. If you want an email when a notice goes up on the government side, gov.uk’s short guide says Find a Tender sends you an email when someone posts a notice that meets your criteria. Our Find a Tender guide covers the setup.

Responding to a tender on Delta

Not assessed: check the portal’s own help pages for how to submit a response, whether you can withdraw one, and what the stages are. We have not logged any of that, so we won’t describe screens or buttons.

What we can say comes from the Act. Section 21(3) says a contracting authority must provide any associated tender documents “in accordance with the tender notice”. So read the notice for where and how to respond, and follow the instructions in the tender documents for clarification questions.

Our advice, not a portal fact: submit well before the closing time, not at it. A log-in or upload problem found in the last hour leaves you no time to fix it, and you shouldn’t count on a buyer reopening a closed tender for one supplier. Log in and test your access a few days before the deadline.

If the pack includes a questionnaire, our guide to the PSQ explains what it covers and how to prepare.

Will a Delta tender also be on Find a Tender?

It may be, if the buyer is running the tender under the Procurement Act 2023. Here is what the sources say.

• Above the procurement thresholds. Section 21(1) says a contracting authority must publish a tender notice to invite tenders in an open procedure, or requests to participate (or first tenders) in a competitive flexible procedure. gov.uk’s guidance says notices are published on the central digital platform at gov.uk/find-a-tender (para 5), and that “notices must first be published on the central digital platform, before being posted elsewhere” (para 30).
• Below the thresholds, from £12,000 or £30,000. When a contracting authority intends to advertise a notifiable below-threshold contract, the below-threshold guidance says it must first publish a below-threshold tender notice on the central digital platform (para 35). Notifiable means £12,000 or more including VAT for central government authorities and £30,000 or more including VAT for all others (para 10; section 87).

So when a public buyer advertises a Procurement Act tender on Delta, a notice should also be on Find a Tender, and then it can appear in our list. The sources say where notices must go. They do not say which tenders a given buyer runs on Delta.

Here is when that may not be so:

1. Procurements started under the old rules. PPN 019 says the Contracts Finder publishing requirements only apply to procurements commenced under the Public Contracts Regulations 2015. We haven’t set out the old publishing rules here.
2. Contracts below those values. Section 87 ties the below-threshold notice to notifiable contracts, defined by those values, so the sources we cite do not require a notice below them. A buyer may still advertise elsewhere.
3. Devolved Scottish authorities. Section 2 lists a devolved Scottish authority as an excluded authority, with an exception for procurement falling within section 115A. Our Public Contracts Scotland guide covers where those notices go.
4. Buyers that are not contracting authorities. The duty in section 21 falls on contracting authorities, as defined in section 2.
5. Direct invitations. Delta’s FAQ says buyers invite suppliers to their lists. Below the thresholds, the below-threshold guidance says no below-threshold tender notice is needed where the buyer invites only a closed group of pre-selected suppliers and does not advertise the procurement any other way (para 23). We cannot tell whether a public notice sits behind a given Delta invitation.

For any individual Delta tender, we cannot tell whether it will also appear on Find a Tender.

Before you bid

Read the notice and the pack for the deadline, the procedure, the conditions of participation, and what is asked for on insurance and certifications. Whatever the notice says, confirm it in the pack before you spend time on a bid.

We have not reviewed what Delta tenders ask for, because it varies by buyer. If you can’t meet a requirement, that is a call for you to make with the pack in front of you. Our bid or no-bid checklist is a place to start.

Another common buyer system is ProContract (Proactis).

Or let us check what we do cover

Delta eSourcing is a buyer’s system you use directly, and we don’t replace it. For the Find a Tender and Contracts Finder side, tell us your trade and postcode to join the free weekly list of live tenders, starting soon. On Pro (£49/month), notices that fit your trade and area are checked against what each states about insurance, certifications and location, and you get an email each morning on days with new matches.

Trade marks belong to their owners.