Heat Pump Grant Calculator 2026 (Germany KfW 458 / Austria / Switzerland)
Check your exact subsidy rate under Germany's updated KfW 458 rules (up to €22,400 grant), Austria's Raus aus Öl, or Switzerland's Gebäudeprogramm.
- Grundförderung (DE)30 %
- Klimageschwindigkeitsbonus (gültig bis 31.01.2027)+ 16 %
- Einkommensbonus + 30 %
- Summe / Förderobergrenze76 % → max. 70 %
Formula: 2026 KfW 458 Heat Pump Grant (Germany) & AT/CH Subsidies
Grant Rate (%) = min(Cap 70% or 80%, 30% Base + 16% Speed Bonus + 10%/30%/40% Income Bonus + 5% Natural Refrigerant/Geothermal Bonus)
Cash Grant (€) = min(Total Investment, Eligible Cap €28,000 for 1st Unit) × Grant Rate (%)Verified on kfw.de (November 2026): Eligible costs for a single-family home (1st residential unit) are capped at €28,000. The Climate Speed Bonus is 16%, and the tiered Income Bonus provides +40% (≤ €30k taxable income), +30% (≤ €40k), or +10% (≤ €50k), with a +€10,000 threshold allowance if a minor child lives in the household.
Worked Example: Replacing an Old Gas Boiler in a Family Home
An owner-occupied household with one child and €38,000 taxable income replacing a 22-year-old gas boiler with an R290 propane heat pump (€32,000 total quote) qualifies for 30% base + 16% speed + 40% income (child raises the €30k threshold to €40k) + 5% R290 bonus = capped at 80% of €28,000 = €22,400 cash grant.
How to Calculate Your 2026 Heat Pump Grant (KfW 458 / AT / CH)
Check your exact subsidy rate, eligible cost cap, and remaining net investment in 30 seconds.
- 1. Select Country (DE KfW 458, AT KPC, CH Gebäudeprogramm): Choose your country and number of residential units.
- 2. Specify Existing Heating System & Owner-Occupancy: Check eligibility for the 16% Climate Speed Bonus.
- 3. Select Household Income Tier, Minor Child & Refrigerant: Apply the tiered income bonus (+€10,000 child allowance) and 5% R290/geothermal bonus.
- 4. Review Cash Subsidy & Remaining Net Cost: See your exact grant amount and out-of-pocket cost.
KfW 458 Heat Pump Grant Components (Germany, Verified Nov 2026, €28,000 Cap for 1st Unit)
| Grant Component | Bonus Rate | Eligibility Criteria | Max Grant (on €28,000) |
|---|---|---|---|
| Base Grant | 30% | Efficient heat pump installation | €8,400 |
| + Efficiency Bonus | +5% (35%) | R290 Propane refrigerant or Geothermal/Water source | €9,800 |
| + Climate Speed Bonus | +16% (up to 51%) | Owner-occupier replacing oil/coal/night-storage or gas ≥ 20 yrs | €14,280 |
| + Income Bonus Tier 3 | +10% (up to 61%) | Taxable income ≤ €50,000 (≤ €60,000 with child) | €17,080 |
| + Income Bonus Tier 2 | +30% (70% cap) | Taxable income ≤ €40,000 (≤ €50,000 with child) | €19,600 (70% Cap) |
| + Income Bonus Tier 1 | +40% (80% cap) | Taxable income ≤ €30,000 (≤ €40,000 with child) | €22,400 (80% Cap) |
Source: Official KfW 458 product specification (checked 2026-11-07).
Frequently Asked Questions (FAQ): Heat Pump Grant Calculator
What is the maximum KfW 458 heat pump grant in 2026?
For a single-family home (1st residential unit), eligible costs are capped at €28,000. With the standard 70% maximum subsidy rate, the grant reaches up to €19,600. Low-income households (taxable income ≤ €30,000, or ≤ €40,000 with a minor child) qualify for an 80% cap, unlocking up to €22,400.
Related Calculators & Formula Documentation
Calculate your official 2026 heat pump subsidy for Germany (KfW 458), Austria (KPC), and Switzerland (Gebäudeprogramm).