6% or 21%: Europe’s VAT Discount Map for Home Energy
The same €12,000 home energy project costs €720 more or €1,600 less depending on a single invoice line. Europe’s VAT discount map is the most valuable document your installer never shows you.
Belgium first, because it is the most generous and the most misapplied. Homes older than ten years qualify for 6% VAT instead of 21% on renovation work — and home energy systems count. On a €12,000 project, that is €1,600. The conditions: the home’s age, the work invoiced correctly, and the customer’s signed attestation. We keep finding quotes that default to 21% because nobody asked; the installer loses nothing by charging it, and you lose €1,600.
The Netherlands sits at the opposite extreme for panels: 0% VAT on residential solar since 2023, one of the cleanest incentives in Europe. Home batteries there do not enjoy the same blanket treatment — the retrofit storage case is argued invoice by invoice. Germany went further still: zero VAT on the complete PV system including storage, which quietly made German battery bundles the cheapest in the region relative to income.
The pattern that matters for your wallet: VAT treatment follows the invoice structure, not the hardware. A battery sold as part of a PV renovation may qualify for a reduced rate where a standalone battery purchase does not. The same box, the same house, a different invoice — a different price. This is why we insist on one habit: before comparing any two quotes, check the VAT line on both. A quote that is €800 cheaper at 21% VAT may be €700 more expensive at the correct 6%.
Three traps we documented this year. The split invoice: some installers split hardware and labour across entities, breaking the renovation-rate logic — ask for one invoice, one rate, in writing. The new-build trap: homes under ten years old do not qualify for Belgium’s 6%, full stop — no clever invoicing changes that. And the mixed-project trap: adding non-qualifying work (a garden room, say) to a 6% invoice contaminates the whole document.
What to do: determine your home’s status (build date, renovation history) before requesting quotes; demand the VAT rate as an explicit line in every quote; and if an installer dismisses the question with “that’s just how we bill”, treat it as the data point it is.
Sources: Belgian FPS Finance guidance on the reduced renovation rate, Dutch and German VAT codes as applied to residential energy systems, current to publication date. Your notary or accountant has the final word on edge cases.