Funding money is rarely lost because there was no entitlement – but because the application was submitted too late, incomplete, or not at all. The cardinal error is the same everywhere: build first, ask later. Anyone who keeps to the right order, works through all three funding levels (Confederation, canton/city, municipality) and knows the payout obligations gets what they're entitled to. (As of: July 2026)
Key points in brief
- Mistake number one is the same everywhere: applying after construction has started – practically no programme pays retroactively, and the entitlement is lost completely.
- Funding is a three-layer system: Confederation (one-off feed-in incentive), canton or city, municipality – anyone who checks only one level gives away the others.
- "Start of construction" is defined more narrowly than many think: even placing the order or drilling the ground probe can already count.
- It's not over once approved: deadlines for accounting and commissioning, proof obligations and correctly stating it in the tax return all belong to it too.
- The simplest protection against all seven mistakes: contractually hand the applications to the specialist company – deadline tracking included.
Mistake 1: Building first, asking later
The most expensive and most common mistake at once – it costs the whole contribution. Practically all programmes require the application before construction starts: the City of Zurich's funding before placing the order, the cantonal heat pump programme before installation, and even with the Confederation's one-off feed-in incentive, registration belongs at the start. Retroactive applications are excluded – not out of spite, but by system logic: what's funded is what might not get built without the contribution; what's already built, by definition, no longer needs an incentive.
How to avoid it: write the order into the project plan – application, confirmation, then signature and construction. And when in doubt, wait a week rather than lose a funding contribution.
Mistake 2: Misunderstanding "start of construction"
The twin of mistake 1, subtler and therefore more dangerous: each programme defines for itself what counts as the start of construction – and it often starts earlier than the client thinks. Under the Zurich heat pump funding, the ground-probe drilling already counts as the start; under the City of Zurich's solar funding, it's already placing the order. Anyone who signs the works contract and plans to "submit the application next week" has, depending on the programme, already lost.
How to avoid it: read the specific programme's definition of "start of construction" – one sentence in the regulations that decides thousands of francs. When in doubt: no signed order before the application is confirmed.
Mistake 3: Checking only one funding level
Switzerland's funding landscape is a three-layer system: the Confederation with the one-off feed-in incentive, the canton or city with its own programmes, and below that individual municipalities with top-up contributions. The layers can generally be combined – but nobody registers you everywhere automatically. The classic loss: the one-off feed-in incentive is applied for, the city contribution too – and the municipal contribution nobody knew about quietly lapses.
How to avoid it: systematically work through all three levels for your own location once – the postcode check on energiefranken.ch is the usual starting point, confirmation comes from the municipality's or programme's own page.
Mistake 4: Wanting funding for the wrong object
Every programme has funding conditions – and the classic ways to fail are always the same: the system falls short of the minimum size, the application comes from the tenant instead of the owner, the mandatory solar shares get counted along even though only the voluntary part is funded, or the battery is registered without the required energy management. None of this is bad intent – it's unread small print.
How to avoid it: read the specific programme's funding conditions in full once (they're usually short) – or have someone who knows them check. A specialist company that submits applications weekly spots the pitfalls before submission.
Mistake 5: Submitting incompletely – and missing the follow-up query
Missing data sheets, no site plan, a quote without the required line items: incomplete applications aren't rejected but sent back for correction – and that's where the real risk starts: the follow-up query lands in spam, the deadline passes, the application is written off, and meanwhile the construction schedule is pushing to start without an approval.
How to avoid it: tick off the programme's checklist when submitting, give a working contact email – and keep an eye on the application status until the approval is in.
Mistake 6: Switching off after the approval
The approval is half-time, not the final whistle. After it come the second half's obligations: implementation and accounting deadlines (many approvals lapse if construction and accounting aren't done within a defined period), completion proof, the certification process for the one-off feed-in incentive – and payout almost everywhere follows only after completion, which needs to be accounted for in financial planning.
How to avoid it: transfer the deadlines from the approval into your calendar the same day it arrives. Two entries are enough: implementation deadline, accounting deadline.
Mistake 7: Forgetting the funding in the tax return
The quiet straggler: investments in a solar system and heat pump are deductible in most cantons – but funding contributions received reduce the deductible amount and need to be declared correctly. Anyone who "forgets" the contributions risks a reassessment; anyone who forgets the deduction entirely gives away the third funding level that isn't called one: the tax saving.
How to avoid it: collect the invoice, funding approvals and payout confirmations in one folder – that's the whole preparation the tax return needs.
The seven mistakes at a glance
| Mistake | Costs | Avoidance |
|---|---|---|
| 1. Application after construction started | the whole contribution | Order: application → approval → construction |
| 2. "Start of construction" misunderstood | the whole contribution | Read the programme's definition; no signature before confirmation |
| 3. Only one level checked | Municipal/top-up contributions | Work through Confederation + canton/city + municipality |
| 4. Conditions unread | Rejection, delay | Read the small print in full (or have it read) |
| 5. Submitted incompletely | Deadlines, nerves | Checklist, reachable email address, track the status |
| 6. Deadlines after approval missed | Lapse of the approval | Implementation/accounting deadline in the calendar |
| 7. Tax side forgotten | Reassessment or a given-away deduction | Collect receipts, declare correctly |
As of: July 2026. The programmes' current provisions are decisive.
Of all the paperwork around solar and heat pumps, the funding application is the one where care translates most directly into francs – and carelessness too. The bitterest cases that reach us are mistakes 1 and 2: the system long since ordered, the application "still pending", the entitlement gone – and irretrievably so, because here there's no goodwill we could negotiate. That's why we've made applications a fixed part of the contract in our projects, with internal deadline tracking: no order is placed before the relevant confirmations are in. That sounds bureaucratic and is the opposite – it's the one week of patience that turns a stack of paper into a sizeable contribution to the system. Our recommendation to anyone submitting themselves: treat the application like the works contract. It's worth just as much money.
Frequently asked questions
Can I submit a forgotten funding application after the fact?
Practically never after construction has started – retroactive funding is excluded under the relevant programmes, and there's no goodwill here. The exception is programmes whose deadline is tied to a different event (such as commissioning); the specific regulations are always decisive.
Who submits the application – me or the installer?
Formally usually the property owner, in practice good companies handle it – as part of the contract, deadline tracking included. Ask explicitly and have it written into the quote; "we'll sort that out" is not a commitment.
Are Confederation, city and municipal contributions really combinable?
As a rule, yes – the three-layer system is designed that way, and programmes offset each other where necessary. The exceptions are in each programme's conditions; a current special case is the City of Zurich's communication, which states its new rates including federal contributions – worth a close look there.
How long does it take from application to payout?
The approval arrives within days to weeks depending on the programme; the money flows almost everywhere only after completion and accounting – for the one-off feed-in incentive, after commissioning and certification. Plan your liquidity accordingly: funding lowers the final cost, not the first invoice.
What happens if I miss a deadline from the approval?
Approvals are time-limited – anyone who doesn't deliver within the implementation or accounting deadline risks it lapsing. For foreseeable delays (delivery times, site backlogs), an early request for an extension is worthwhile; most offices are willing to talk as long as you come before the deadline expires.
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No contribution gets left behind – contractually.
At ecoEn, funding applications are part of the contract: all levels checked, submitted on time, payout tracked. You only sign once the approvals are in.
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Sources: Programmes of the Confederation (Pronovo), City of Zurich and Canton of Zurich (current provisions in each case); empirical data from ecoEn GmbH's application practice, Zurich region.
Last updated: 9 July 2026 · Author: ecoEn editorial team
