Official 2026/27 TariffsIndependent Public Utilities100% Free Public Access

Official UK Domestic & Trade Calculators

Free, independent estimators updated for official statutory tariffs, government grant vouchers, and regulatory compliance standards across England, Scotland & Wales.

⚡Ofgem & Octopus SEG Ready

Solar & Battery Storage Payback Estimator

Calculate your exact annual electricity savings, smart export guarantee earnings, and battery break-even timeline with live MCS efficiency curves.

Average Annual Returns£1,382 / yr

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🇬🇧Statutory £7,500 Voucher

Boiler Upgrade Scheme (£7,500 Grant) Estimator

Check your home's eligibility for the statutory £7,500 UK Government heat pump voucher and compare heating fuel costs vs gas/oil.

Government Funding£7,500 Off

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🚰Environment Agency Part H

Septic Tank & Domestic Drainage Cost Estimator

Estimate off-grid septic replacement, soakaway percolation repair, and emergency unblocking costs against verified regional contractor benchmarks.

Benchmark Turnaround24h - 48h

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💼HMRC 25% Full Expensing

Business Asset Finance & Tax Relief Calculator

Calculate commercial machinery and vehicle lease repayments alongside HMRC Corporation Tax first-year full expensing write-offs.

First-Year Tax Relief25% Write-Off

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