How to Apply to UK Defence Innovation in 2026
UKDI absorbed DASA. There is no single application: you bid into one themed competition or Open Call, and the money is a contract, not equity.
How to Apply to UK Defence Innovation in 2026
How to apply to UK Defence Innovation in 2026: there is no single application. Pick one live themed competition or Open Call on GOV.UK, write to its published scope and Technology Readiness Level, then submit the six-step online form. Funding is contract-based, not equity, and every competition sets its own deadline.
DASA did not shut down. The Defence and Security Accelerator became part of UK Defence Innovation, and its machinery came with it: themed competitions and enduring Open Calls, each carrying its own scope, cap, duration and Technology Readiness Level band.
Treating UKDI like an accelerator is the fastest way to waste a month. No cohort, no demo day, no cheque against your cap table. You are bidding to deliver a defined piece of work.
The old name survives in the URLs. The guidance for submitting a proposal still sits on a defence-and-security-accelerator path (UKDI submit a proposal). Same process, new front door.
How to apply to UK Defence Innovation in 8 steps
Choosing the competition decides the outcome; the form takes an afternoon.
- Pick one live competition. Open the collection and choose a single competition or Open Call (UKDI live funding opportunities).
- Read that competition document first. Scope, TRL band, duration and funding cap are set per competition, and the table below shows how far apart they sit.
- Select the service and challenge. Step one of the six-step online form (UKDI submit a proposal).
- Provide the summary. On two-stage competitions this is the sifted document.
- Describe the innovation. Technical approach, what is novel, and TRL at start and end.
- Submit finance and delivery details. Cost each deliverable and lay out the project plan.
- Provide risks, assets and team information. Technical risk, customer-provided assets, and who does the work.
- Review and submit. Re-check scope, TRL, duration and funding limit before you send.
There is no single UK Defence Innovation application
Each competition is its own contract opportunity with its own rules. The live set as listed on 25 August 2026:
| Competition | Funding | Duration | TRL | Close as listed |
|---|---|---|---|---|
| Security Open Call 2026 Cycle 1 | Up to £350,000; testing and trialling only £150,000 | Up to 12 months, 18 with trialling | Stated at Stage 1 | 27 August |
| Space to Innovate: Delta Drop, Stage 2 | £900,000 total budget | Up to 18 months | 3 to 6 | 1 September 2026 |
| Novel Autonomy and Robotics, Stage 2 | Phase 1 up to £60,000; Phase 2 up to £200,000 | 3 months, then up to 1 year | Begins below TRL 3 | 17 September |
| Innovation Support to Operations Cycle 8 | Under £350,000 expected, up to £1 million excluding VAT | Up to 4 months | TRL 6 by project end | 22 September |
Close dates as listed in the UKDI live funding opportunities collection.
Company stage is not the filter; technology maturity is. A pre-revenue team below TRL 3 has a route that a Series A company at TRL 7 does not.
UK Defence Innovation deadline 2026: read the year carefully
Every date above is a per-competition close, not a program-wide deadline. The collection is a rolling list: a competition live today can be gone in a fortnight, replaced by a cycle with different caps.
Of the four, only the Delta Drop document prints the year with the date, as 1 September 2026 (UKDI Space to Innovate: Delta Drop). The rest were listed as day and month against a 25 August 2026 snapshot, so confirm the close date and time on the document itself. Dated windows in this family sit in our deadline calendar.
Do not chase the cycle closing this week. A Stage 1 written in two days to hit a 27 August close is written to a deadline, not to a challenge, and the sift catches that.
UK Defence Innovation equity terms: a contract, not an investment
UKDI funding is contract-based rather than an equity investment. IP generated under the contract generally remains with the contractor, while government receives specified rights to use the technical information and IP (UKDI standard terms and conditions). No equity stake and no program fee are published.
| UKDI competition | Equity accelerator | |
|---|---|---|
| What you give up | Government rights to use the technical information and IP | A percentage of the company |
| What you get | Payment against contract milestones | Cash at close, plus a cohort |
On Delta Drop, projects may be funded up to 100% of eligible costs with no match funding, and payments are made against milestones rather than upfront (UKDI Space to Innovate: Delta Drop).
Model that as receivables, not runway. You fund the work between milestones from existing cash. The trade against a priced round sits in accelerator vs grant vs pre-seed round.
Write to Desirable, Feasible and Viable, or get cut before assessment
Compliant proposals are scored on Desirability, Feasibility and Viability, then run through moderation, challenge and a decision conference. Before that, proposals can fail outright over scope, TRL, duration, funding limit, insufficient technical detail or non-compliance (UKDI assessment process and criteria).
Scoring is not where most proposals die. Every one of those pre-sift checks is one you can run yourself in ten minutes with the competition document open.
The Security Open Call runs a maximum 1,000-word Stage 1 overview covering strategic fit, compatibility, expected TRL, exploitation, scope and timeline, and invited applicants then produce an approximately 9,000-word Stage 2 proposal with technical detail, project plan and finance breakdown (UKDI Security Open Call 2026 Cycle 1).
A 1,000-word Stage 1 is not a summary of your product. It is a compliance checklist with prose wrapped around it.
✅ Good: "This proposal addresses Challenge 2 of the Security Open Call. We take our sensor-fusion stack from TRL 4 to TRL 6 in 11 months, delivered by a UK-registered team, exploited through an existing end user." Scope, TRL, duration and exploitation cleared in four lines.
❌ Bad: "Our platform is transforming how organisations think about autonomous sensing. We have a strong team, early traction, and a scalable technology with wide applications." No named challenge, no TRL, no exploitation route.
UK Defence Innovation acceptance rate: the program does not publish one
There is no published UKDI acceptance rate and no published cohort size. These are not fixed-size intakes, so a per-cycle percentage would not mean what an accelerator acceptance rate means. Any figure on an aggregator is not from the program.
Use the pre-sift criteria as your odds model. Inside scope, TRL band, duration cap and funding limit, and you compete on assessment rather than compliance. Rates from programs that do disclose them sit in our accelerator acceptance rates benchmark.
Is UK Defence Innovation worth it for a venture-backed startup
Worth it when the contract is the point, not the cash. A funded project puts a defence or security end user on your technology, keeps your IP (UKDI standard terms and conditions).
Not worth it when you need runway. Four months on Innovation Support to Operations (UKDI Innovation Support to Operations Cycle 8) is a sprint, not a funding round. Run it alongside a raise, not instead of one, and read defence and dual-use startup funding before you pick a route.
When this matters for your raise
A delivered UKDI contract is the cleanest proof a defence startup can hand an investor: a government customer paid for the work. Seed startups on Carta raised $1.8 billion across 507 rounds in Q4 2024, down 18% in capital year over year (Carta State of Private Markets).
Build the investor list while the project runs, not after the final milestone. Causo matches delivered milestones against funds actively writing cheques in defence and dual use.
FAQ
How hard is it to get into UK Defence Innovation? UKDI publishes no acceptance rate and no cohort size, so any percentage quoted elsewhere is not from the program. What it does publish is how proposals fail before full assessment: scope, TRL, duration, funding limit, insufficient technical detail and non-compliance (UKDI assessment process). Compliant proposals are then scored on Desirability, Feasibility and Viability.
Does UK Defence Innovation take equity? No. UKDI funding is contract-based rather than an equity investment, and intellectual property generated under the contract generally stays with the contractor while government takes specified rights to use the technical information and IP (UKDI terms and conditions). No equity stake and no program fee are published.
How much funding does UK Defence Innovation provide? The cap is set per competition, not by the program. Security Open Call projects can receive up to £350,000, with testing-and-trialling-only projects capped at £150,000 (UKDI Security Open Call 2026 Cycle 1). Read the cap on the competition document you are bidding into before you cost anything.
When is the UK Defence Innovation application deadline? There is no single UKDI deadline. Each competition publishes its own: as listed on 25 August 2026, Security Open Call Cycle 1 closes 27 August, Delta Drop Stage 2 on 1 September, Novel Autonomy and Robotics Stage 2 on 17 September, and Innovation Support to Operations Cycle 8 on 22 September (UKDI live funding opportunities). Only the Delta Drop document prints the year with the date, so confirm yours on the document itself.
Is UK Defence Innovation worth it for founders? For a team with defence or security relevant technology and the capacity to deliver a scoped project, yes: the money is non-dilutive and IP generally stays with you (UKDI terms and conditions). For a team that needs general runway, no: the windows are short and payments arrive behind the work. Treat it as a customer-funded validation contract, not a seed substitute.
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