Base filing deadline
Employees / standard filers31 MarchVerified
Self-employed30 JuneVerified
Extension
No request needed — granted automatically. Silence counts as approval — you don't need to wait for a confirmation.
Request online, via the canton's tax portal — Online
- Freeuntil 31 MayPartially confirmed
- CHF 40Verified
Absolute maximum extension
Not published. No official source states a hard maximum date for this canton.Not confirmed
Contact your commune's tax officeIf you miss it
- Formal noticeAmount not published — verify with your cantonal tax officeNot confirmed
The one deadline that's the same everywhere
A Pillar 3a contribution or pension-fund (BVG) buy-in counts for a tax year only if it's credited to your account by 31 December of that year — the date you initiate the payment doesn't count, only the date it lands.
Banks and 3a foundations often close their own booking cutoff a few days early (commonly ~24–27 December) so the payment posts in time — that's provider practice, not law, so don't wait until the 31st.
Sources & methodology
- View source →Last verified 2026-07-06
- When is the Basel-Landschaft tax return due?
- 31 March for employees / standard filers.
- Can I get a deadline extension in Basel-Landschaft?
- Yes — see the Extension section above for the exact process, cost, and channel.
- What happens if I miss the deadline in Basel-Landschaft?
- See the "If you miss it" section above for this canton's specific consequences.
- When's the deadline for a Pillar 3a contribution?
- 31 December, nationwide, for every canton — and the payment must be credited to your account by then, not just sent.