CIL surcharges and what a missed commencement notice costs
The Community Infrastructure Levy punishes paperwork failures harder than it punishes anything else. Here is what a missed commencement notice actually costs, and the order to do things in.
A missed commencement notice is the most expensive piece of paperwork in the levy system. If you start work on a chargeable development without telling the collecting authority the day before, the whole Community Infrastructure Levy charge falls due at once, any instalment plan you were relying on disappears, and a surcharge lands on top. None of that turns on the merits of your scheme. It is purely procedural, and self-builders are caught by it more often than anyone.
The Community Infrastructure Levy Regulations 2010, as amended, run a paperwork sequence that sits alongside the planning permission but is administered separately. Planning officers rarely chase it. The levy team does, and usually after the digger has already arrived.
What the commencement notice actually does
A commencement notice tells the collecting authority the date on which the chargeable development will begin. It has to reach the authority before that date, not on it and not after it. The form is short and asks for the planning permission reference, the liability notice reference and the intended start date.
Its purpose is to fix the day the levy becomes payable. Payment periods, instalment triggers and the withdrawal conditions attached to relief all count forward from commencement, so the authority needs a date it can defend.
Where no valid notice arrives, the authority may determine a deemed commencement date from whatever evidence it has. Site photographs, building control inspection records, utility connection dates and neighbour complaints all end up in that file. A deemed date is usually earlier than the one you would have chosen, and it carries the payment consequences from that day.
Commencement for levy purposes follows the material operations test in section 56 of the Town and Country Planning Act 1990. Digging a trench for a foundation counts. So does laying out an access road. Site clearance and demolition ordinarily do not, but the line is finer than most self-builders expect, and a groundworker breaking ground to "get ahead of the weather" has started development whether or not anyone intended it.
Assuming liability before anything happens on site
Someone has to assume liability for the charge in writing before the development starts. If nobody does, the liability falls on the owners of the land by default and the authority can impose a surcharge.
The regulations set that surcharge at 20 per cent of the chargeable amount or £2,500, whichever is the lower figure. On a modest self-build with a five-figure charge, that is the full £2,500.
There is a second, quieter surcharge of £500 for each land interest where the authority has to apportion liability itself because nobody came forward. On a site in joint names, or one where a lender holds a charge, that adds up faster than people expect.
Assuming liability costs nothing and can be transferred or withdrawn later. There is no good reason to leave it undone.
The surcharge for starting without notice
Failing to submit the commencement notice before starting carries its own surcharge, again set at 20 per cent of the chargeable amount or £2,500, whichever is lower. It is charged on top of any liability surcharge, so the two together can reach £5,000 before a single instalment has been missed.
Illustrative example: a self-builder with a chargeable amount of £28,000 who neither assumes liability nor serves a commencement notice faces £2,500 plus £2,500 in surcharges, loses the right to pay by instalments, and receives a demand notice for £33,000 payable within 60 days of the deemed commencement date. The figures are illustrative, but the mechanism is the one the regulations describe.
Instalments and relief, and what falls away
Most charging authorities publish an instalment policy that spreads payment over months or, on larger charges, years. That policy only applies where a commencement notice was served properly. Start without one and the full amount becomes payable in a single sum, typically within 60 days of commencement. For a developer who has budgeted the levy against sales receipts, that alone is worse than the surcharge.
Relief is the harder loss. Self-build exemption, residential annex and extension exemption, social housing relief and charitable relief all depend on continuing compliance after they are granted. The 2019 amendments softened the position for commencement notices, replacing automatic withdrawal of relief with a surcharge in defined circumstances, so the older advice circulating online is out of date. Check the current consolidated text before relying on either version.
Self-build exemption also has a second stage that catches people. The exemption must be claimed and granted before commencement, and the supporting evidence of self-build status has to be submitted within six months of completing the dwelling. Miss that second deadline and the exemption is withdrawn in full, long after the builders have gone. Budget for it the same way you would budget for utility connections on a single new dwelling, as a fixed date in the programme rather than an afterthought.
A disqualifying event, such as selling the dwelling or letting it out inside the three-year clawback period, must be notified to the authority within 14 days. Late notification is its own surcharge.
Late payment surcharges and interest
Once the levy is payable and unpaid, a further layer applies. The regulations impose a late payment surcharge stepped by how long the money has been outstanding, with the first step triggered 30 days after the due date and further steps at six and twelve months. Interest also runs on the outstanding amount at the Bank of England base rate plus 2.5 percentage points, which moves with the base rate rather than sitting at a fixed figure.
Beyond that sit the enforcement powers: a CIL stop notice halting development until payment, and recovery through the courts. Authorities use those sparingly, but they exist and they are not appealable on grounds of hardship.
| Failure | Consequence under the regulations |
|---|---|
| No assumption of liability before commencement | Surcharge of 20 per cent of the chargeable amount or £2,500, whichever is lower |
| Authority has to apportion liability | £500 for each land interest |
| No commencement notice before starting | Surcharge of 20 per cent or £2,500, whichever is lower, plus loss of instalments |
| Payment outstanding after the due date | Stepped late payment surcharge plus interest at base rate plus 2.5 percentage points |
| Disqualifying event not notified within 14 days | Surcharge and withdrawal of the relief |
Figures reflect the Community Infrastructure Levy Regulations 2010 as amended. Verify them against the current consolidated text before relying on them, because the levy regime has been amended repeatedly.
Getting a surcharge reviewed
A surcharge is not final on the day it arrives. You can ask the collecting authority to review it within 28 days of the surcharge notice, and the review is carried out by someone who was not involved in the original decision.
If the review fails, an appeal against the surcharge goes to the Valuation Office Agency, normally within 60 days. Appeals against a deemed commencement date go to the Planning Inspectorate instead, on the narrow question of when material operations actually began.
Both routes are evidence-driven. Dated site photographs, groundworker invoices, delivery notes and the building control initial notice do more work than argument. An appeal that says the surcharge is unfair will not succeed. One that shows the authority picked the wrong date, or that a notice was delivered and mislaid, sometimes does.
The order to do things in
- Read the liability notice as soon as it arrives and check the chargeable amount and the floorspace figures against your drawings.
- Submit the assumption of liability form, whoever will actually pay.
- Claim any exemption or relief and wait for the authority to grant it in writing.
- Serve the commencement notice, allowing a working day or two before your intended start.
- Tell the groundworker in writing that nothing may happen on site until you confirm the notice is acknowledged.
- Diary the six-month self-build evidence deadline and any instalment dates on the day permission is granted.
That sequence costs nothing except attention. The alternative costs thousands, and it is the same class of avoidable expense as failing validation and resubmitting an application. On a phased scheme the sequence repeats at every phase, which is one of the reasons planning costs recur when a scheme is phased. If you are pricing a project end to end, put the levy paperwork in the same line of the budget as professional fees rather than treating it as free, and compare it against what the reports themselves cost.
This is general guidance, not legal advice. Check the position with your collecting authority or a qualified professional before relying on it.
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Frequently asked questions
What happens if I start building before submitting a CIL commencement notice?
The collecting authority can determine a deemed commencement date from its own evidence, impose a surcharge of 20 per cent of the chargeable amount or £2,500 whichever is lower, and demand the whole levy in one payment instead of by instalments. The surcharge is separate from the levy itself and is added to the demand notice.
Can a CIL surcharge be cancelled?
You can ask the collecting authority to review the surcharge within 28 days of the surcharge notice, and appeal to the Valuation Office Agency if the review does not succeed. Reviews turn on evidence, such as proof that a notice was served or that material operations began on a different date, rather than on whether the amount feels fair.
Does demolition count as commencement for CIL purposes?
Commencement follows the material operations test in section 56 of the Town and Country Planning Act 1990. Demolition and site clearance ordinarily fall outside it, while digging foundation trenches or laying out an access road fall inside it. The boundary is fact specific, so confirm the position with the collecting authority before any machinery arrives.
Do I lose self-build exemption if I forget the commencement notice?
The 2019 amendments replaced automatic withdrawal of relief with a surcharge in defined circumstances, so the older guidance saying the exemption is always lost is out of date. The separate requirement to submit self-build evidence within six months of completing the dwelling still results in full withdrawal if it is missed.
Is interest charged on late CIL payments?
Yes. Interest runs on the outstanding amount at the Bank of England base rate plus 2.5 percentage points, so the figure moves with the base rate rather than sitting fixed. Stepped late payment surcharges apply as well, starting 30 days after the due date and increasing at six and twelve months.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.