Delay in Start-Up Insurance UK: DSU Cover for Projects
Delay in Start-Up (DSU) Insurance
When a fire, flood, or insured event on site pushes your completion date back, the damage isn't just the rebuild — it's the revenue, rent, or returns you'd have been earning if the project had opened on time. Delay in Start-Up insurance protects that lost income. We arrange DSU cover for UK construction and development projects through specialist insurers and Lloyd's.
Most construction insurance buyers understand contract works cover — it pays to repair or rebuild the physical damage if a fire, flood, storm, or other insured event hits the site. What far fewer projects insure properly is the financial consequence of that same event: every week the completion date slips, the developer isn't collecting rent, the investor isn't seeing returns, and the loan interest keeps running. Delay in Start-Up (DSU) insurance — sometimes called Advance Loss of Profits (ALOP) — is the cover that fills that gap. It's the construction equivalent of business interruption, and on a funded development it's often the difference between a delay being an inconvenience and being a financial crisis. Below is what DSU actually covers, who needs it, and how we arrange it.
What is DSU insurance?
Delay in Start-Up (DSU) insurance covers the loss of anticipated income — rent, revenue, or investment return — when physical damage from an insured event delays the completion of a construction project beyond its planned start date. It responds only where the delay is caused by an insured event under the contract works/material damage policy (such as fire or flood), and it covers the financial loss during the period of delay, not the cost of repairing the damage itself.
Why a Project Needs DSU Cover
Without DSU, a project carries its contract works cover but leaves the financial timeline completely exposed. The gaps that catch developers and funders out are:
- Lost rental or sales income — a delayed completion means tenants can't move in and units can't be sold on schedule, but the income was already built into the project's financial model.
- Continuing finance costs — loan interest and funding charges keep accruing throughout the delay, with no income coming in to service them.
- Investor and pre-let obligations — pre-agreed completion dates with tenants, buyers, or investors can trigger penalties or lost deals when missed.
- Fixed overheads still running — professional retainers, management costs, and standing charges continue regardless of the delay.
- Lender requirements — many development funders now require DSU/ALOP cover as a condition of the facility, because it protects their interest as well as yours.
What DSU Insurance Covers
DSU is structured around the financial loss flowing from a delay, and is placed alongside the contract works/material damage cover it depends on. A properly arranged DSU policy typically covers:
- Loss of anticipated gross profit or revenue — the income the completed project would have generated, lost during the delay period.
- Loss of anticipated rental income — for developments built to let, the rent foregone while completion is delayed.
- Continuing finance and interest costs — debt servicing that runs throughout the delay with no offsetting income.
- Fixed costs and standing charges — overheads that continue regardless of whether the project is generating income.
- Increased cost of working — additional expenditure incurred to reduce or avoid the delay (such as accelerated works).
- An agreed indemnity period — the maximum length of delay the policy will respond to, set to match the realistic recovery time for your project.
Who Needs DSU Insurance
DSU is relevant to anyone whose financial position depends on a construction project completing on time:
| Project / party | Why DSU matters to them |
|---|---|
| Property developers | Lost sales or rental income and continuing finance costs if completion slips |
| Build-to-rent / residential schemes | Rental income built into the model is delayed unit by unit |
| Commercial / mixed-use developments | Pre-let tenants and phased income exposed to delay penalties |
| Project funders & lenders | Often require DSU/ALOP as a condition of the development facility |
| Principal contractors & D&B | Contractual completion obligations and liquidated-damages exposure |
| Infrastructure & energy projects | Revenue-generating assets where delayed start has large income impact |
How It Works
Tell us about the project
The scheme, contract value, programme and completion date, the anticipated income or rent, finance arrangements, and your contract works cover.
We structure the cover
We set the indemnity period and sum insured to match your real financial exposure and present it to specialist construction insurers and Lloyd's.
You get a real quote
We come back with terms you can place, explain exactly how the cover responds, and align it with your contract works policy and lender's requirements.
Why a Broker Matters for DSU
DSU is one of the more technical covers in construction insurance, and it's easy to get wrong in ways that only surface at claim stage. The indemnity period has to reflect the realistic time to recover from a worst-case delay; the sum insured has to be calculated on the right basis (anticipated revenue, gross profit, or rental income); and the DSU cover has to dovetail precisely with the underlying contract works policy, because DSU only responds where the material damage policy does. Get the basis or the period wrong and the cover can fall short exactly when it's needed.
A specialist broker structures all of that correctly, presents it to insurers who write construction delay risk properly, and makes sure it satisfies your funder's conditions. It's also naturally placed alongside your wider project cover — see our contractors combined insurance and construction insurance pages for how DSU fits into the full programme.
Frequently Asked Questions
Contract works (material damage) insurance pays to repair or rebuild the physical damage to a project after an insured event like a fire or flood. DSU insurance covers the separate financial loss — the rent, revenue, or returns you lose while completion is delayed by that same event. They work together: contract works fixes the building, DSU replaces the income lost during the delay. DSU only responds where the contract works policy responds, which is why the two must be aligned.
Yes — Delay in Start-Up (DSU) and Advance Loss of Profits (ALOP) are different names for essentially the same cover. Both protect against the loss of anticipated income when an insured event delays a project's completion. You'll see "ALOP" used more often on larger commercial and infrastructure projects and "DSU" used widely across UK construction, but they describe the same principle. We can arrange the cover under whichever wording your project and funder require.
The indemnity period is the maximum length of time the DSU policy will pay for, measured from the original planned completion date. It needs to reflect the realistic worst-case time to recover from a serious delay — including demolition, redesign, re-tendering, and rebuilding, not just the construction itself. Setting it too short is one of the most common DSU mistakes, because a major fire late in a project can take far longer to recover from than people expect. We help set it to match your project's real recovery timeline.
Increasingly, yes. Many development funders and lenders now require DSU or ALOP cover as a condition of the facility, because it protects their security as well as your equity — if a delay stops the project generating the income that repays the loan, DSU keeps that timeline protected. Check your facility agreement, and if DSU is required, make sure it's structured to satisfy the lender's specific conditions. We regularly arrange cover to meet funder requirements and can liaise on the wording.
It depends on the project. For a development built to sell or generate revenue, it's typically based on anticipated gross profit or revenue; for a build-to-rent scheme, on the anticipated rental income; and it usually includes continuing finance costs and fixed overheads that run during a delay. Getting the basis right matters — insure on the wrong basis and the cover can fall short at claim stage. We work through the figures with you so the sum insured genuinely reflects what you'd lose.
Typically: the project details and contract value, the construction programme and planned completion date, the anticipated income (sales revenue, gross profit, or rental income), your finance and lender arrangements, and details of the contract works/material damage cover the DSU will sit alongside. With that we can set the indemnity period and sum insured correctly and approach the right specialist market for terms.
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