Tax notices follow a yearly pattern; most other official letters follow your case. Use this calendar to prepare for Denmark’s main seasonal notices, recognise their Danish names and turn an actual letter into reminders you can act on.
Set a March reminder for last year’s tax and a November reminder for next year’s tax budget. Add pension or study reminders only if they apply to you. When a letter arrives, put its required action, deadline and reply channel in your calendar—not just “read letter”.
Your calendar for official letters
The exact tax dates below concern the 2025 tax year, handled in 2026. They are past dates, not deadlines for next year. Pension statements are sent in batches, so a seasonal window is not a promised delivery day.
| When | Letter and next step |
|---|---|
| March | Årsopgørelse: last year’s tax assessment. The 2025 notice became available on 23 March 2026. Compare income and deductions with your records in TastSelv. |
| 20 May 2026 | The initial correction deadline for the 2025 årsopgørelse. A required oplysningsskema (tax return) had a separate 1 July 2026 deadline. |
| From mid-May | Opgørelse af folkepension: the annual state-pension statement for many recipients. Find the income year and compare the figures used with your tax assessment. |
| 1 July 2026 | The last day to pay outstanding tax for 2025 before the percentage surcharge replaced daily interest. It was not an interest-free payment deadline. |
| 28 July 2026 | Admission answers for higher education through Den Koordinerede Tilmelding (KOT). Read the institution’s answer and its deadline for accepting a place. |
| From September | Later folkepension statements for the circumstances explained below, and annual tidlig pension statements. Use the response date in your particular letter. |
| November | Forskudsopgørelse: the tax budget for the coming year. Check expected annual income and deductions; keep the current year’s budget up to date too. |
Tax: keep the two years separate
The årsopgørelse looks backwards; the forskudsopgørelse looks ahead. In spring 2026 you checked your actual 2025 income. In November 2026 you prepare the budget for 2027. A changed salary during 2026 can also mean changing the current 2026 budget—without waiting until November.
Some people, including those with a sole proprietorship or foreign income, must complete an oplysningsskema before their assessment can be generated. That explains why a missing March notice is not always late delivery. See the Danish Tax Agency’s English guide to the tax assessment for the 2026 dates and tax-return route.
For a November reminder, write “check next year’s expected salary and commuting deduction”. Have your expected full-year income and working pattern ready. SKAT’s preliminary assessment guide explains which changes to enter.
If you still owe tax for 2025, use the current payment information in TastSelv rather than the expired July date. SKAT distinguishes daily interest before that date from the later surcharge in its outstanding-tax guide.
Pension: May and September are different groups
For folkepension, Udbetaling Danmark starts sending the annual statement in mid-May. It comes from September if you or your spouse or cohabiting partner are self-employed, or if you live abroad or have foreign income. These circumstances are listed in borger.dk’s state-pension guidance (in Danish).
Tidlig pension is a separate benefit. Its annual settlement also starts from September, according to the tidlig pension guidance. Do not treat one pension’s timetable or response period as a rule for every benefit.
When the statement arrives, note the year being settled and the reply date. If figures need correcting, the UDK letter guide explains the difference between an annual statement, a hearing, a decision and a payment demand, with a completed Danish objection.
Study offers and childcare letters
For applications through KOT, the 2026 admission answer date was 28 July. The institution tells you how to receive the answer and when to accept an offer; there is no single acceptance date to copy for every institution. UddannelsesGuiden explains the answer process in Danish.
Childcare subsidy letters do not belong to one fixed month. Økonomisk friplads can be adjusted using monthly income information and settled again for the whole year. Read whether a letter concerns a particular month or an annual settlement. The ministry’s guidance describes both processes.
Turn a Danish deadline into three reminders
A calendar entry needs a verb and an outcome. “Kommune” is easy to postpone; “send September payslip and save receipt” tells you when the task is finished.
Here is a fictional request. The municipality, case number and dates are invented for the example.
The Danish letter
Eksempelkommune · Sag EK-26-814
5. oktober 2026
Vi mangler din lønseddel for september 2026. Send den via Digital Post til Ydelseskontoret, så vi har modtaget den senest den 16. oktober 2026 kl. 12.00. Skriv sagsnummer EK-26-814 i emnefeltet.
In English: The benefits office needs your September 2026 payslip. It must receive it through Digital Post by 12 noon on 16 October. Include case number EK-26-814 in the subject.
Senest means “no later than”; modtaget means “received”. Here, kl. 12.00 is noon, not midnight. Preserve the time as well as the date. These entries work backwards from that specific request:
- 12 October, 18:00 — Find September payslip. Download the complete PDF and check the month and your name. Keep the letter with it so the request is easy to find again.
- 14 October, 18:00 — Send payslip, case EK-26-814. Use the named recipient in Digital Post, attach the PDF and include the case number. Save the sending receipt with the letter.
- 16 October, 09:00 — Check receipt before the noon deadline. Confirm that the message was sent to the right recipient with the right attachment. A saved draft is not a sent message.
These are suggested personal reminders, not extra legal deadlines. If the document is unavailable, contact the sender before the stated deadline and ask for a specific extension. Keep the original deadline in your calendar until an extension is confirmed. For a finished Danish reply and extension request, use the kommune letter guide.
Unexpected letters: act when they arrive
Requests from SIRI, municipal decisions, court letters and payment demands follow individual events. Open them when they arrive rather than waiting for a calendar month. First identify what is requested, who must receive your response and the date or time given.
For a residence-case document request, use the SIRI letter guide. For an unpaid-bill letter, identify the sender first: a debt collection letter and a court payment order call for different responses.
Get help with the wording
SkrivSikkert can explain a Danish letter in English, read it aloud and help you write a clear Danish reply. Use the web platform or the browser extension; many functions are free without login.
Try asking Sofia: “Find every date and time in this letter. Separate the reply deadline from dates that describe earlier events. Then turn the required action into three calendar entries.” Compare the entries with the original letter, add them to your calendar and send your reply through the channel the sender specifies.
Frequently asked questions
When does the Danish tax assessment arrive?
The annual tax assessment, årsopgørelse, is normally available in March. The 2025 assessment became available on 23 March 2026. If you must first complete a tax return, your assessment is generated after you submit it.
Should I wait until November to change my tax budget?
No. November is when the preliminary assessment for the coming year becomes available. You can also update the current year’s forskudsopgørelse when your income or deductions change.
Why can a pension statement arrive in September?
Folkepension statements arrive from September in cases involving self-employment in the household, living abroad or foreign income. Many other folkepension recipients get theirs from mid-May. Annual tidlig pension settlements start from September too.
What should I put in a reminder for an official letter?
Include the action, recipient, case number and exact deadline, including any time of day. Add an earlier preparation reminder and a reminder to check that the reply and attachments were actually sent. Save the sending receipt.
