For UK private-rental landlords + portfolio managers
MEES 2030 payback calculator
From 1 April 2030, all NEW UK domestic tenancies must hold an EPC of band C or better; existing tenancies follow at 1 April 2033. Today's minimum is band E. An estimated 30% of UK rented stock sits at band D or below in 2026 — affected landlords need to plan upgrades or register an exemption. The Stratum MEES Payback API at /v1/epc/postcode/{postcode}?currentAnnualRent={gbp} returns the verdict against both the current dom-E rule and the proposed dom-C rule, plus an estimated upgrade cost and payback period.
How the payback calculation works
The algorithm reads the EPC measure list (the recommended improvements MHCLG already publishes per certificate), selects the cheapest combination that lifts the property to the target band (dom-E or dom-C), sums the costs, and divides by the annual rent uplift the upgrade unlocks (a per-band uplift table sourced from HomeLet's rental index). Output: total upgrade cost (£), selected measures (loft insulation / glazing / boiler / etc), rent uplift per year (£), payback in months. When the property already meets the target, the response surfaces "no upgrade needed" rather than a negative payback.
Why early-mover advantage matters
The 2030 dom-C rule has been confirmed-policy since the January 2026 government response. Landlords who upgrade in 2026-2028 lock in lower contractor rates (the upgrade demand curve will spike in 2029) and avoid the 2029-30 quote-bottleneck. Landlords who delay until 2029 face one of three outcomes: a non-compliant property they cannot let post-2030 (£30,000 penalty exposure on each breach), a forced sale at a discount because the buyer prices the upgrade gap into their offer, or an emergency upgrade at premium contractor rates. The early-mover discount window is closing.
When to claim an exemption
MEES exemptions exist for listed buildings, properties where the upgrade has a 7-year-or-longer payback period, properties where the tenant or third party refuses consent, and a few other narrow cases. Each exemption must be registered on the PRS Exemptions Register with supporting evidence; an unregistered exemption claim is not a defence at enforcement. The payback API output can directly feed an exemption application: a payback period over 84 months is documentary evidence for the 7-year-payback exemption ground.
Frequently asked
How accurate is the cost estimate?
Within ±20% on a per-measure basis (the EPC API includes typical-cost figures published by MHCLG that the algorithm sums directly). Real contractor quotes vary by region + property age + access; treat the estimate as a planning anchor, not a quote.
What if my property has no EPC?
A valid EPC is required to let in 2026. If no EPC exists, commission one (typically £60-£120 from a Domestic Energy Assessor) before running the payback check. The assessor produces the measure list the API consumes.
Does the API account for the 2030 dom-C rule?
Yes. The response carries verdicts against both the current dom-E rule and the proposed dom-C rule, with the target band a query param (`?targetBand=C`). Default target follows the property-type and current-band combination.
Is the calculator free?
The API call is metered at standard EPC pricing (£0.30 per single check on Stratum, included in the Letting Agent Suite at £4.95). Free postcode-bulk lookups for portfolio managers are queued as a future tool at /tools/mees-payback.
What about commercial property?
The dom-E equivalent (non-dom MEES) is in force at band E since 2018. The 2030 cut-over for non-dom is dated 2030-10-01. The API supports both domestic and non-domestic verdicts.