CIL surcharges and how to avoid them
Community Infrastructure Levy surcharges punish paperwork failures, not underpayment. Here is what each one costs, when it bites and how to appeal within 28 days.
Community Infrastructure Levy surcharges are added to the levy bill for procedural failures, not for underpaying. A missed commencement notice can add 20 per cent of the chargeable amount, capped at £2,500. Failing to assume liability before you start adds £50 for each liable person. Late payment attracts a further 5 per cent at each of three stages, and interest runs at 2.5 percentage points above the Bank of England base rate until the debt is cleared. All of it sits in Part 9 of the Community Infrastructure Levy Regulations 2010, and almost all of it is avoidable with three forms and a diary.
The people who get caught are rarely the ones who dispute the levy. They are self-builders who assumed the exemption did the work, and small developers whose groundworker turned up a week early.
The surcharges the regulations allow
Collecting authorities have a menu, and they can apply more than one to the same development.
| Failure | Surcharge |
|---|---|
| Not assuming liability before commencement | £50 for each person liable |
| Authority has to apportion liability | £500 for each land interest |
| No notice of chargeable development for permitted development | 20 per cent of the chargeable amount, capped at £2,500 |
| No commencement notice before development begins | 20 per cent of the chargeable amount, capped at £2,500 |
| Not answering an information notice | 20 per cent of the chargeable amount, capped at £1,000 |
| Payment overdue | 5 per cent at 30 days, again at six months and again at twelve months, with a minimum of £200 each time |
The percentages bite hardest on mid-sized schemes. On a levy bill of £9,000 the commencement notice surcharge is £1,800. Above £12,500 of levy the cap takes over and the surcharge flattens out at £2,500, which is why the penalty stings a five-unit scheme far more than it does a major.
Assuming liability before you start
Assumption of liability is a separate act from receiving the liability notice. The council issues the liability notice once permission is granted, setting out the chargeable amount and who it thinks is on the hook. Someone then has to file the assumption of liability form, and that has to happen before development begins.
If nobody assumes liability, the levy falls on the owners of the land by default, the authority apportions it between the land interests, and both the £50 and the £500 surcharges become available. On a site with several registered titles, apportionment alone can run into four figures before a single brick moves.
Liability can be transferred later, and it can be withdrawn, but the transfer takes effect only from the date the authority receives it. Builders who agree to take on the levy as part of a contract should file the form rather than rely on the contract.
The commencement notice and the date it carries
The commencement notice tells the collecting authority the day development will begin, and it has to arrive before that day. Not on the day. Not once the diggers are on site.
Two things trip people up. The first is the definition of commencement, which follows section 56 of the Town and Country Planning Act 1990 and includes material operations such as digging foundation trenches, laying out a road, and demolition where that forms part of the permitted scheme. Site clearance to satisfy a pre-commencement condition can amount to commencement for levy purposes even where the main build is months away. The second is that the notice must be served for every chargeable development, including those carrying full relief.
That second point deserves emphasis. A self-build exemption or a residential extension exemption does not remove the commencement notice duty. Since the 2019 amendments the penalty for a missing notice where relief has been granted is a surcharge rather than automatic clawback of the whole exemption, which softened a famously harsh rule, but the surcharge still lands and it is calculated on the notional chargeable amount.
Instalments, interest and the demand notice
Where the authority has adopted an instalment policy, the right to use it depends on serving a valid commencement notice. Miss it and the full sum falls due immediately on commencement, which turns a staged bill into a single demand at the worst possible point in a build programme.
The demand notice follows commencement and sets out the payment dates. From then on, late payment surcharges and interest accumulate on the outstanding balance. Interest at 2.5 percentage points above base rate is not punitive on a short overrun, and it is the surcharges rather than the interest that do the damage.
If the debt is left, the authority can apply for a liability order, and the enforcement powers behind that order run through to charging orders over the land. A CIL stop notice can halt development altogether. Councils reach for these rarely, and usually after several ignored letters, but the powers are real and the cost of putting things right afterwards is covered in the cost of an unauthorised development put right.
Appealing a surcharge
Surcharge appeals go to the Valuation Office Agency, not to the Planning Inspectorate, and the window is 28 days from the date the surcharge is imposed. The grounds are narrow. You can argue that the claimed breach did not happen, that the authority failed to serve a liability notice properly, or that the calculation is wrong. You cannot argue that the surcharge is unfair.
Separate routes cover the deemed commencement date, where the authority has decided development started earlier than you say, and the chargeable amount itself. The chargeable amount routes matter here because they close once development has begun. A scheme that starts on site before challenging the levy calculation has given up the review and appeal rights that went with it, which is the single most expensive mistake in the whole regime.
Requesting a review of the chargeable amount, in writing, within 28 days of the liability notice, costs nothing and preserves the position.
Records that protect you
Keep a levy file from the day permission is granted, and keep it separate from the building file.
- Save the liability notice as issued, with the chargeable amount and the reference number.
- File the assumption of liability form with the acknowledgement of receipt as well as the sent copy.
- Diarise the commencement date and send the commencement notice at least a week ahead, by a method that produces a receipt.
- Record what happened on site on the stated date, with dated photographs, so a disputed commencement date can be answered.
- Log every exemption application and its approval, including the self-build supporting documents.
- Note the instalment dates from the demand notice in the same place as the construction cashflow.
Email receipts matter more than they should. Where a council disputes that a notice arrived, the proof of delivery is usually what decides it.
A commencement checklist for a small site
Before anyone starts work, confirm that permission has been implemented lawfully, that pre-commencement conditions have been discharged, and that the levy paperwork is complete. The three planning documents that most often sit unfinished at this point are the discharge of conditions application, the exemption approval and the commencement notice.
Budget for the levy in the same schedule as the planning application fee and the professional fees, and treat the surcharge risk as a programme risk rather than a finance one. It is triggered by dates, not by money. For a sense of how the other statutory costs stack up across an application, see fees where an application covers more than one category, and for the conditions that quietly add cost later, the cost of a planning condition you did not negotiate.
And if you are still at the stage of working out which supporting documents the council will expect, browse the 66 report types by category and check the validation list before you submit.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.
Frequently asked questions
What is the surcharge for missing a CIL commencement notice?
Twenty per cent of the chargeable amount, capped at £2,500. It applies whether or not the levy itself is payable, so a development carrying full relief can still attract a surcharge calculated on the notional chargeable amount. The charge is separate from any late payment surcharge and from the loss of instalment rights that also follows a missing notice.
Does a self-build exemption remove the need for a commencement notice?
No. The exemption removes the levy, not the procedural duties. A commencement notice has to be served before development begins in every case. Since the 2019 amendments, failing to serve one where relief has been granted triggers a surcharge rather than automatic withdrawal of the exemption, but the surcharge is still calculated on the notional chargeable amount.
How long do I have to appeal a CIL surcharge?
Twenty-eight days from the date the surcharge is imposed, and the appeal goes to the Valuation Office Agency. The grounds are limited to whether the breach occurred, whether the authority served the relevant notices correctly and whether the calculation is right. There is no ground of general unfairness or hardship.
What counts as commencement for CIL purposes?
The levy borrows the definition of material operations in section 56 of the Town and Country Planning Act 1990. Digging foundation trenches, laying out a road and demolition forming part of the scheme all count. Site clearance carried out to satisfy a pre-commencement condition can start the clock, so check before anyone moves earth.
Can I still challenge the levy amount after starting on site?
Generally no. The review and appeal routes against the chargeable amount are designed to be used before development begins, so starting work forfeits them. If you think the floor area, the exemptions or the indexation are wrong, request a review in writing within 28 days of the liability notice and keep the site closed until it is resolved.
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.