Reading your Swiss tax assessment and final bill (2025)

Key takeaways

• Two documents arrive, and they do different jobs. The assessment decides what you owe; the final bill works out what you still have to pay.
• Compare the assessment to what you filed, line by line. Differences are normal and are not always explained.
• The 30-day objection window starts when the assessment is notified, not when you open the envelope. It is 30 days for federal tax and for cantonal tax alike.
• The final bill nets provisional payments and source tax already withheld against the total, then applies interest.
• Objecting reopens the whole year in both directions. The office may reset every figure and, after hearing you, change the assessment to your disadvantage.
• If the office assessed you at its own discretion because you did not file or did not answer, the rules change: you can only attack it as manifestly incorrect, and the objection must be reasoned and name its evidence or it fails on admission.
• After the 30 days, a pure arithmetic or clerical error in the decision can still be corrected for five years (DBG Art. 150). Nothing else can.

This is the end of the process and the part nobody documents in English. It is also the last moment anything can be changed cheaply.

Two documents, two jobs

Document	What it does	What to check
Assessment decision (VeranlagungsverfügungVeranlagungsverfügungAssessment decisionFRdécision de taxationITdecisione di tassazioneThe canton's binding decision on what you owe, which may differ from what you filed. Receiving it starts your 30-day objection window.Where you see itArrives by post, often a year or more after you file.Open in the glossary →)	Sets your taxable income and wealth, and the tax due	Whether the figures match your return
Final bill (SchlussrechnungSchlussrechnungFinal billFRdécompte finalITconteggio finaleThe bill that follows the assessment decision. It nets what you owe against provisional payments already made and any tax withheld at source.Where you see itSent with or shortly after the assessment decision.Open in the glossary →)	Applies payments you already made and calculates the balance	Whether every payment you made appears

They may arrive together or separately. The deadline that matters attaches to the assessment, not the bill.

Two things vary by canton, and both cause the same confusion.

The first is the name. Veranlagungsverfügung is the term used for direct federal tax and in most cantons, but some cantons use their own word for the same document. Zurich calls it an EinschätzungsentscheidEinschätzungsentscheidAssessment decision (Zurich wording)Zurich's own name for the binding decision setting your taxable income and wealth. The same document the federal law calls a Veranlagungsverfügung, and the same 30-day objection window runs from it.Where you see itThe heading on the decision Zurich sends after it has reviewed your return.Open in the glossary →. Different word, same decision, same 30-day clock.

The second is how many envelopes arrive. In many cantons the Schlussrechnung from your municipality covers cantonal and municipal tax only, and direct federal tax is billed separately. Two envelopes is normal, not a duplicate.

Compare it to what you filed

The single most useful thing you can do takes about fifteen minutes: put your submitted return next to the assessment and compare the main figures.

• Taxable income. Does it match what you declared?
• Taxable wealth. Same question.
• Each deduction you claimed. Is it there, and at the amount you claimed?
• Source tax and provisional payments. Are they credited?

Where a figure differs, the assessment usually notes why, though sometimes briefly and in German. A difference is not necessarily an error. The office may have corrected something legitimately, applied a cap you exceeded, or disallowed a claim it considered unsupported. But an unexplained difference is exactly what the objection window exists for.

Where differences usually come from

In rough order of frequency:

• A deduction capped. You claimed more than the cantonal or federal maximum, and it was reduced to the cap. Correct, and worth knowing for next year.
• A claim without evidence. A deduction disallowed because the supporting document was not attached. Usually recoverable by sending it.
• A rate-determining item added. Foreign property or income that does not get taxed here but raises your rate. Surprising the first time and correct.
• A valuation the office set itself. An unlisted security or a property value.
• A genuine transcription slip, yours or theirs.

The first three account for most of it, and none of them is a mistake.

How the final bill is put together

The arithmetic is simple once you know the order:

1. Tax due for the year, from the assessment.
2. Minus provisional payments you made during and after the year.
3. Minus tax already withheld at source, if you were taxed at source for part or all of the year.
4. Plus or minus interest, from the general due date.
5. Equals what you pay, or what comes back.

Step 3 is the one that confuses people who moved out of tax at source: the source tax is credited here, at assessment, and not on the provisional invoices you received earlier. It is credited without interest. Seeing it appear only at this stage is normal. More on that in the provisional tax bill.

Step 4 has a date behind it. Every canton sets a general due date (VerfalltagVerfalltagGeneral due dateFRéchéance généraleThe date cantonal and municipal tax formally falls due — 30 September in Zurich, inside the tax year itself. Interest runs from it in both directions, whatever the date printed on your provisional bill.Where you see itNamed on the provisional invoice and on the final bill.Open in the glossary →) for cantonal and municipal tax, and interest is calculated around that date rather than around the date printed on the invoice. What you paid before it earns interest in your favour (VergütungszinsVergütungszinsCredit interestFRintérêt rémunératoireWhat Zurich pays you on tax you handed over before the general due date. The mirror of Ausgleichszins, which is what it charges on anything still outstanding after that date.Where you see itSettled in the final bill, after your assessment.Open in the glossary →); what is still outstanding after it is charged interest against you (AusgleichszinsAusgleichszinsCompensatory interestFRintérêt compensatoireInterest on tax still outstanding after the general due date. Zurich names the other direction separately: Vergütungszins is what it credits you on payments made before that date. A third rate, Verzugszins, applies once a final bill is overdue.Where you see itSettled in the final bill, after your assessment.Open in the glossary →). Both are settled in one calculation on the final bill, which is why a bill can show interest in both directions. In Zurich that date is 30 September of the tax year; check your own canton's, because it is the date the interest turns on.

The final bill also carries its own 30-day payment deadline. That is a different clock from the 30 days to object, and the two are easy to confuse: one is the time to pay, the other the time to disagree.

If you disagree

You have 30 days from notification to file an objection (EinspracheEinspracheObjectionFRréclamationITreclamoA formal challenge to an assessment decision, due within 30 days of notification. Miss it and the assessment becomes final in almost all cases.Where you see itThe deadline is printed on the assessment decision itself.Open in the glossary →), in writing, with the authority that issued the assessment. The same 30 days apply to federal tax and to cantonal tax, and the clock starts the day after the decision is delivered. Two things to weigh before you use it.

It reopens the whole year. An objection is not a request to adjust one line. The law says the authority may set all tax factors afresh and, after hearing you, may change the assessment to your disadvantage. If your position is strong on the disputed item and comfortable elsewhere, that is fine. If you were hoping nobody looked closely at something else, it is a real consideration.

Evidence beats argument. Most successful objections are short letters with the missing document attached. If the disallowed deduction had a receipt you did not send, send it now.

If the deadline is close and your evidence is not ready, object within the window and supplement afterwards. A late objection is only accepted where you can show you were genuinely prevented from filing, for reasons such as illness, service or absence from the country. Even then it must come within 30 days of that obstacle ending.

Once the assessment is final, two narrow routes remain and they are not interchangeable.

A calculation or writing error in the decision itself can be corrected for five years from notification, on your request or by the office of its own motion (DBG Art. 150). This covers a transposed figure, a wrong addition, a number copied into the wrong line. It does not cover a deduction you never claimed, a valuation you now dispute, or a legal point you would rather have argued. The same appeal routes apply to the correction, or to a refusal to make one, as to the original decision.

Everything else needs RevisionRevisionReopening a final assessmentFRrévision (d'une décision de taxation)ITrevisione (di una decisione di tassazione)The only route once an assessment is legally final and the 30-day objection window has closed. The grounds are narrow, and it is excluded where the error came from your own lack of care.Where you see itA request to the tax office, long after the assessment.Open in the glossary → (reopening a decision that is already legally binding). Its grounds are narrow. They cover newly discovered facts or decisive evidence, a serious procedural failure, or a crime that influenced the decision. It must be requested within 90 days of discovering the ground. It is excluded outright where you could have raised the point with reasonable care in the ordinary procedure, which is what makes the 30-day window the moment that matters.

If the office assessed you at its own discretion

There is one assessment that does not play by the rules above, and it is the one a late or unresponsive filer gets. Where you did not file despite being reminded, or did not answer the office's questions, it may assess you at its own dutiful discretion (Veranlagung nach pflichtgemässem Ermessen): it estimates your income and wealth rather than reading them off a return, and it is entitled to estimate on the high side.

Objecting to one of these is harder in two specific ways, and both catch people out.

• You can only attack it as manifestly incorrect. Not "too high in my view", not "here is a better figure". The estimate has to be wrong on its face. An assessment that is merely at the pessimistic end of a plausible range will stand.
• The objection must be reasoned and must name its evidence, in the objection itself. An ordinary objection can be a bare sentence, supplemented later. This one cannot: an unreasoned objection to a discretionary assessment fails on admission, without anyone examining whether the estimate was right.

In practice that means filing the return you never filed, with the documents, as part of the objection. Do not send a short letter promising them.

The 30 days are the same 30 days, and the assessment becomes final on the same terms.

• Federal tax (direkte Bundessteuer)Same rates everywhere in SwitzerlandCheck itThe only layer that does not depend on where you live
• Cantonal tax (Staatssteuer)Set by your cantonCheck itWhy the same salary costs differently across the border
• Municipal tax (Gemeindesteuer)Set by your municipalityCheck itWhy two neighbouring villages differ

The base is what your return determines; the multipliers are not something you can influence on the form. In most cantons the cantonal and municipal layers (plus church tax where you are liable) are billed together, and the federal layer arrives separately.

Common mistakes

• Filing the assessment unread. It is the only moment differences are cheap to fix.
• Counting the 30 days from when you opened it. The clock runs from notification.
• Assuming a difference is an error. Caps and rate-determining items are the usual causes and are correct.
• Objecting over a difference you would lose. It reopens the year; make sure the item is worth it.
• Missing a payment that was not credited. Check every provisional instalment and any source tax appears in the final bill.
• Confusing the 30 days to pay with the 30 days to object. The final bill gives you 30 days to pay it. The assessment gives you 30 days to disagree with it. Paying on time does nothing to protect the objection deadline.
• Ignoring it because a refund is due. A refund still deserves a check that the figures behind it are right.
• Sending a bare objection to a discretionary assessment. It needs its reasons and its evidence in the objection itself, or it is not examined at all.
• Reaching for Revision over an arithmetic slip. A calculation or writing error has its own five-year correction route and does not need revision grounds.

Common questions

My assessment does not match my tax return. Is that a mistake?

Often not. The usual causes are a deduction reduced to its legal cap, a claim disallowed for missing evidence, or foreign income added for rate determination only. The assessment normally notes the reason. If it does not and the difference matters, that is what the objection window is for.

How long do I have to object?

Thirty days from notification of the assessment, for cantonal and federal tax alike. It is short and it does not extend while you gather documents. A late objection is only considered if you can show something genuinely prevented you from filing in time.

My document says Einschätzungsentscheid, not Veranlagungsverfügung. Is it the same thing?

Yes. Some cantons use their own name for the assessment decision, and Zurich is the common example. Veranlagungsverfügung is the term used for direct federal tax and in most other cantons. Both are the decision that sets your taxable income and wealth, and both start the same 30-day objection period.

What is the difference between the assessment and the final bill?

The assessment decides what you owe for the year. The final bill applies what you have already paid, both provisional instalments and source tax withheld, then adds interest to produce the balance.

The bill does not show the tax my employer withheld. Where is it?

It should appear as a credit in the final bill. Source tax is credited at assessment rather than on provisional invoices, so this is the document where it shows up. If it is genuinely absent, that is worth a call.

Should I object if I only disagree with one figure?

Only if that figure is worth it, because an objection reopens the whole assessment rather than the single line. Where the item is a missing document, sending the evidence with a short objection is usually enough.

The office estimated my income because I did not file. Can I still object?

Yes, within the same 30 days, but to a stricter standard. A discretionary assessment can only be challenged as manifestly incorrect, and the objection must set out its reasons and name its evidence to be examined at all. File the missing return and the supporting documents together with the objection rather than promising them.

I spotted an arithmetic error after the 30 days. Is it too late?

Not for that. A calculation or writing error in the decision can be corrected for five years from notification, on request or by the office itself (DBG Art. 150). It is a narrow route: it fixes wrong arithmetic, not a deduction you never claimed or a figure you now disagree with.

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This article is general information, not tax, legal, or financial advice. Assessment practice varies by canton. PaperTax helps you complete your own official cantonal tax return. It does not file on your behalf. For advice on your own situation, consult a qualified Swiss tax professional or your cantonal tax office.

Sources

1. DBG Art. 132 — objection within 30 days of delivery, federal tax — fedlex.admin.ch
2. DBG Art. 133 — the period starts the day after delivery; late objections only on proven impediment, and then within 30 days of it ending — fedlex.admin.ch
3. DBG Art. 135 para. 1 — on an objection the authority may reset all tax factors and, after hearing the taxpayer, change the assessment to their disadvantage — fedlex.admin.ch
4. StHG Art. 48 — the same 30-day objection period and the same power to reset every factor, for cantonal and municipal taxes — fedlex.admin.ch
5. DBG Art. 132 para. 3 — a discretionary assessment may be challenged only for manifest incorrectness, and the objection must be reasoned and name its evidence ("Eine Veranlagung nach pflichtgemässem Ermessen kann der Steuerpflichtige nur wegen offensichtlicher Unrichtigkeit anfechten. Die Einsprache ist zu begründen und muss allfällige Beweismittel nennen.") — fedlex.admin.ch
6. DBG Art. 147 — grounds for revision, and its exclusion where the point could have been raised with reasonable care — fedlex.admin.ch
7. DBG Art. 148 — revision within 90 days of discovery and at most ten years after the decision — fedlex.admin.ch
8. DBG Art. 150 — Berichtigung: calculation and writing errors in final decisions corrected within five years of notification, on request or of the authority's own motion — fedlex.admin.ch
9. Canton Zurich, Zürcher Steuerbuch 172.1 — collection of state and municipal taxes: 30 days to pay a final bill, and interest computed around the 30 September due date — zh.ch
10. Canton Zurich, Zürcher Steuerbuch 173.1 — issuing tax bills: every bill must state that it concerns state and municipal taxes and whether it is provisional or final; final bills follow an Einschätzungsentscheid — zh.ch
11. Canton Zurich — tax bills for private individuals: state and municipal tax billed by your municipality, direct federal tax handled separately — zh.ch

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