The £10,000 EPC cost cap: what counts, what does not, and the evidence you need

The rule in one line: from 1 October 2030 every privately rented home in England and Wales must reach EPC band C, you are not required to spend more than £10,000 including VAT per property getting there, spending has counted since 1 October 2025, and if you spend the cap and still fall short you can register an exemption. The catch is that the exemption is evidenced, not asserted. This is what counts, what does not, and what you need to be able to show.

What the cap is

Ten thousand pounds per property, including VAT. It is a ceiling on your obligation rather than a budget you are expected to exhaust: if the property reaches C for three thousand, you are done at three thousand. For properties worth under £100,000 an alternative applies, capping the obligation at 10% of market value instead, which matters in parts of the country where the flat cap would be a large fraction of the asset.

Two details catch people out. The cap includes the cost of the EPC assessment itself, which is a small mercy and easily forgotten when totting up. And the clock started on 1 October 2025, which means work you paid for last autumn may already be on the meter, if you can still find the invoice.

What counts

Money spent on recommended improvements to the property's energy performance, from 1 October 2025 onward. In practice that is the fabric and services work an assessment puts on the list: insulation, glazing, draughtproofing, heating and hot water, ventilation where the improvement requires it, controls, and the assessment fees themselves.

What does not

Anything you would have done anyway that does not improve energy performance. A new kitchen is not a retrofit measure because the units are modern. Redecoration after insulation is a grey area worth invoicing carefully: making good that is genuinely part of the measure reads differently from a repaint of the whole house. Routine repairs, safety certificates, and works to parts of the building outside your control do not count. Neither does your own time, however much of it this consumes.

The honest position on anything ambiguous is that it will be judged on the paperwork, so the way to protect a borderline item is to have the contractor describe it accurately on the invoice at the time, not to argue about it in 2031.

The evidence you will need

An exemption is registered on the PRS Exemptions Register, and it is expected to last around ten years, which makes it one of the more valuable pieces of paper attached to a property. To get there you need to be able to show a coherent story:

• The assessment that recommended the measures, dated.
• Every invoice, with the work described, the date, the VAT and the amount, adding to the cap.
• Proof of payment for each, because an invoice is a claim and a bank line is a fact.
• The post-works EPC showing the property still falls short after the money was spent.
• Quotes for what you did not do, where they show a remaining measure would exceed the cap.

What sinks people is not the arithmetic, it is five years of invoices in three email accounts and a shoebox. The measures happen over years, contractors go out of business, and the person assembling the file in 2030 may not be the person who paid for the loft in 2026.

The fine for getting it wrong

Penalties are set to rise sharply, to £30,000 per property, and enforcement is expected to shift toward councils checking rather than waiting for a tenant to complain. Providing false or misleading information to the exemptions register is itself an offence, which is another reason the file needs to be real rather than reconstructed.

A practical way to keep it

Open the file on the first pound, not the last. Keep one record per property with every retrofit invoice against it, the running total against the cap, and the assessment beside them, and the exemption case assembles itself. That is how Level Best is built: a project per property, documents attached to the project, a budget you can tag and total. A cap meter that counts nominated lines against the £10,000 and lists the evidence next to it is on the list to build, and if it would be useful to you, say so here and it moves up.

Checked August 2026. These rules have moved before, and the reform of EPCs themselves is still settling, so confirm the current position before committing money. This is a plain-English summary and not legal advice.

Common questions

Does the £10,000 include VAT?

Yes. The cap is £10,000 including VAT per property, and it also includes the cost of the EPC assessment itself.

What if my property is worth less than £100,000?

An alternative cap of 10% of the property's market value applies instead of the flat £10,000, which lowers the obligation on lower value stock.

I spent money on insulation in early 2025. Does it count?

Qualifying spending counts from 1 October 2025. Work paid for before that date does not go on the meter, although it still improves the rating and so reduces what is left to do.

How long does a cost cap exemption last?

It is expected to run for around ten years from registration. It attaches to the property and the landlord who registered it, so confirm what happens on a sale rather than assuming it transfers.

Do I have to spend the full cap before applying?

You have to have carried out the improvements that can be made within the cap. The exemption is for properties that still fall short after that, not for properties where the work looks expensive.

What happens if I cannot find an old invoice?

Then that spending is hard to count, which is the whole argument for keeping the file from the start. A contractor may reissue a copy, and a bank statement line plus a quote is better than nothing, but neither is as good as the original.