Your Swiss tax return — we prepare it or we check it, double-checked and sealed. Fixed price CHF 49.
Your choice: send us your documents and we prepare it, or send your finished return and we check it. Either way, every line item goes through a second independent AI check against your receipts and is sealed with proof — you see it, confirm it and file it. Fixed price CHF 49, no subscription, no surprises.
The first result is free: you learn how many line items add up and how many need attention. For the full, sealed report — which line item and why — you pay CHF 49. Your data under the revFADP.
See a full example verification log
Sample dataThis is the audit trail you receive with your finished tax return — item by item, no jargon.
- IncomeSource: salary certificate 2025✓ recorded✓ matches
- Work-related costs (commute, meals)from your details and receipts✓ calculated✓ matches
- Pillar 3abank certificate✓ recorded✓ matches
- Health insurance premiumspremium statement✓ recorded✓ matches
- Further educationreceipt missing — nothing is filed without its receipt→ for review
- Donationsreceipt✓ recorded✓ matches
… and 18 more items — each checked separately, as above.
Evidence over claims: anything that fails the double check is never filed without you — you see it first.
What we do, and how.
You send us your documents. We prepare your tax return —or check the one you've already done—, with an independent double-check and sealed with proof. You see it, confirm it and file it. One price: CHF 49.
- Send us your documents — or your finished return.
- We prepare it or check it, line by line against your receipts.
- Independent double-check by AI and a seal with a digital fingerprint.
- You confirm and file — you stay in control.
Four steps. Your part takes minutes.
You send us your documents — or your finished return — and we handle the rest. At the end you have your finished tax return and a sealed report, before you file with the tax office.
Send us your documents
Your completed tax return — if you have one — and your receipts: salary certificate, pillar 3a statement, accounts, premiums, deductions — as PDFs or straight from your camera. If something is missing, we tell you before going on.
We prepare or check every line item
If you haven't done it, we prepare it; if it's finished, we check it. Every line item against your receipts and the rules of the Confederation, canton and municipality: work expenses, pillar 3a, medical costs, withholding tax, deductions — each with its reasoning.
Double-checked and sealed
A second independent check verifies every line item. Only what both checks confirm stays in. Every step is sealed with a digital fingerprint.
You confirm and file
You see your return line by line, correct what's needed and file it yourself with the tax office. The first result is free — you only pay the CHF 49 for the full, sealed report.
Your tax return, prepared or checked, for the Canton of Zurich.
For employees and cross-border commuters — the same AI, the same fixed price of CHF 49, the same double check with proof.
Tax return with AI
Send us your documents and we prepare it, or send your finished return and we check it — every line item against your receipts, double-checked and sealed with a digital fingerprint. Fixed price CHF 49, no subscription.
Cross-border commuters & expats
Withholding tax, subsequent ordinary assessment, income from two countries: this is where mistakes are most common — and most expensive. Here too, we prepare or check every line item against your receipts, by the same rule: prove it, don't just claim it. We handle only your Swiss tax return: we neither prepare nor advise on foreign returns — for those you need an adviser licensed in your country of residence.
Guide: withholding tax and the subsequent ordinary assessment →
VAT check for SMEs (in preparation)
The same principle for Swiss VAT: an independent check of your quarterly statement before it goes out — with a logged audit trail.
For fiduciary firms (in preparation)
The same verification and proof layer on top of the software your firm already uses — as quality assurance for your mandates. The signature towards your clients stays with you.
One price. Everything included. No surprises.
CHF 49 for your complete tax return — prepared or checked, double-checked and sealed. No subscription, no hourly rate. The first result is free — you only pay for the full, sealed report.
per tax return · fixed price, one-off · final price, nothing is added
No VAT: the service is not VAT-liable (the 100'000-franc threshold is not reached). CHF 49 is what you pay — terms, cl. 1 and 4.
- Every line item prepared or checked — against your receipts
- Second independent check of every line item
- Sealed verification log with a digital fingerprint
- Every objection explained — “declared vs. receipt”, with its reason
- Your data under the revFADP — anonymised before any external AI service
The check result is free: you learn how many line items were checked and how many need attention. For the full, sealed report — which line item and why — you pay CHF 49.
Who the fixed price is enough for
For the vast majority: employees, cross-border commuters and simpler situations. You send us your documents — or your finished return — and we do the rest, at the same price.
If your case is genuinely complex, we tell you before you pay — a professional will then be the better fit.
| What you get | Free (result) | CHF 49 (report) |
|---|---|---|
| Your finished tax return — prepared by us or checked, ready to file | not included | included |
| Independent check of every line item item against your receipts | included | included |
| Result: how many line items checked, how many to review | included | included |
| Which line items — in detail, with the reason | not included | included |
| “Declared vs. receipt” for each objection | not included | included |
| Sealed verification log (hash) to download | not included | included |
| Full report as a PDF, ready before you file | not included | included |
An honest line: the free result tells you how many line items we checked and how many need attention — with the same numbers as the paid report. What the report adds is the detail and the proof: which line item, why, “declared vs. receipt” and the sealed verification log.
What you should compare us with.
There are good tools and good people out there. Here is what each option costs you — in money, time or certainty.
Cantonal software & tax programs
Cantonal online portals and self-service tax software
Good, and mostly free — but you don't know if it all adds up in the end: no second opinion, no proof. A mistake only shows up when the tax office asks questions.
Fill it in there as usual and we check it, or let us prepare it for you — with proof, before you file.
AI tax apps
Apps that prepare your return with AI
Their result can be checked too. We verify every line item independently against your receipts and give you the sealed verification log — not just a figure to trust.
And do compare prices: with us, CHF 49, fixed.
Fiduciary & your bank's tax check
Fiduciary firms · your bank's tax advisory
Experience, judgement, liability — billed by the hour. For special cases (self-employment, property, inheritance), the right address.
For the ordinary Swiss tax return that is often more than you need: ours costs CHF 49 — your fiduciary stays for the complex work.
What you get at Steuerfertig
- CHF 49, fixed price — your tax return, prepared or checked, no subscription
- Double-checked — a second independent check verifies every line item
- Sealed proof — every step logged, with a hash
- Reasoning per line item — not "looks fine", but why
- You stay in control — you confirm before filing
Your data: Swiss law, no detours.
Tax data is sensitive: AHV number, accounts, salaries. That is why the same rules apply to every mandate — and you get them in writing.
Swiss law (revFADP)
Your data is processed under the revised Swiss Federal Act on Data Protection (revFADP, in force since 1 September 2023) — supervised by the FDPIC. Where EU law additionally applies, we meet its standard (GDPR) as well. On request, we sign a data processing agreement (DPA).
Anonymised before external AI services
Identifying data (names, AHV numbers, accounts) is removed or replaced before any external AI service is used. Demos always run on fictitious documents.
What happens to your documents
Your documents reach us today by email, which is not end-to-end encrypted; on this site transmission is always encrypted (TLS/HTTPS), and the providers are named in the privacy policy. Every verification step is logged and sealed with a hash; nothing is decided about you automatically.
Responsibility in writing
Purpose, scope, retention and your rights are in the mandate before we start. Your documents are kept only for the duration of the mandate; 30 days after completion they are deleted — earlier on request.
The route one of your documents takes
"Your data is safe" means nothing if you cannot check it. So instead of promising it, we show the whole route: where a document of yours comes in, who touches it, what is stripped out before the AI sees it, and when it is deleted. Where a step is weak we say so — and we say how to close it.
- It arrives — by email. Between servers the transfer is encrypted as long as your server supports it, but email is not end-to-end encrypted. If you want that gap closed too: send the documents in a password-protected ZIP or PDF and give us the password through another channel.
- It is stored — in the engagement mailbox, whose providers are named, with their country, in the privacy policy. Nothing ends up on a public file service, nothing is shared, nothing is sold. Ever.
- It is de-identified — before any external AI service sees anything, name, AHV number and account numbers are removed or replaced. What leaves goes out anonymised; the specific provider is named to you in writing before we start.
- It is checked twice — every item against its supporting document, then again by an independent check. Every step is logged with a digital fingerprint (hash), so it can be reconstructed afterwards what was checked and with what result.
- You decide — nothing automatic decides about you: you get the result, review it, confirm it and file the return yourself (art. 21 revFADP).
- It is deleted — 30 days after the engagement closes. Earlier, as soon as you ask.
And what we do not do: this site sets no cookies, no analytics, no tracking; we send you no advertising; we file nothing in your name; we do not sell or pass on your data. All details on the controller and your rights in the privacy policy; scope, price and liability in the terms of service.
What a careful taxpayer would ask us.
Do you do my tax return, or check it?
Both — your choice. Send us your documents and we prepare it, or send your finished return and we check it. Either way, a second independent AI check verifies every line item against your receipts, you get a sealed report and you file it yourself. Fixed price CHF 49.
How much does it cost?
The check result is free: you learn how many line items were checked and how many need attention. The full, sealed report — which line item, why, with “declared vs. receipt” — costs CHF 49, fixed price, no subscription.
How and when do I pay?
You only pay once your report is ready — never in advance. You receive a Swiss QR bill, which you scan with TWINT or your bank's banking app; the money goes straight to our business account. No credit card, no subscription, no payment provider account needed.
Can I rely on the result?
A second check by an AI independent of the first verifies every line item against your receipts — whether you filled it in or we prepared it. We show you every objection with its reasoning, and before filing you see and confirm it yourself — you are the one who files it.
What does “sealed” mean?
Every step is logged and given a digital fingerprint (hash). This makes it possible to reconstruct later what was checked, and with what result — if the tax office or your bank asks questions.
Will my tax data end up on the internet?
Our working rule: identifying data (names, AHV numbers, accounts) is removed or replaced before any external AI service is used. Details are in the privacy policy; demos always run on fictitious documents.
Does Swiss data protection law apply?
Yes. We work under the revised Swiss Federal Act on Data Protection (revFADP, in force since 1 September 2023), supervised by the FDPIC. Purpose, scope, retention and your rights are put in writing before we begin the check. On request, we sign a data processing agreement (DPA).
Which cantons do you cover?
Today, the canton of Zurich — we deliberately start with a single canton so that every line item is right; more will follow. The AI prepares or checks your return according to the rules of the Confederation, canton and municipality; cantonal specifics are checked by the second independent check before you file.
How long does it take?
Sending takes only minutes. We then prepare or check your return, and you receive the report to review — without losing an evening over it. If a document is missing, we tell you before moving on.
Which documents we need — and how they reach us safely.
We need your receipts — and your finished return, if you have one. You send us everything by email; we confirm receipt and tell you what is missing before we start.
Checklist
- Your completed 2025 tax return, if you have one (if not, we prepare it)
- Last year's tax return (if available — it helps the cross-check)
- Salary certificate(s)
- Pillar 3a statement
- Interest and balance statements for your accounts
- Health insurance premium overview
- Receipts for deductions (training, donations, medical costs)
- If applicable: annual crypto statement, statements of foreign accounts
Incomplete? No problem — send what you have. We will tell you in our reply what is missing.
Send documents by email
Tell us about your case.
A few details, and we get back to you. No obligation.