01
INPUT
Enter the invoice
Amount, start date, end date. That's it. Multi-line invoices and fiscal years that end in June or March are there when you need them.
Free · for the Swiss CO, HGB and IFRS 15
Split an invoice
across periods,
down to the day.
BillSplitter splits prepaid expenses and deferred revenue across periods with the precision auditors look for, and the speed controllers actually need. No signup, nothing stored.
- Precision
- Day-exact, to the cent
- Standards
- Swiss CO 958b · HGB § 252 · IFRS 15
- Where it runs
- Your browser · no data retained
Invoice #2026-041
15/01/2026 → 14/12/2026
Period
Days
Allocation
Amount CHF
Jan 2026
17
610.78
Feb 2026
28
1,005.99
Mar 2026
31
1,113.77
Apr 2026
30
1,077.84
May 2026
31
1,113.77
Jun 2026
30
1,077.84
Jul 2026
31
1,113.77
Aug 2026
31
1,113.77
Sep 2026
30
1,077.84
Oct 2026
31
1,113.77
Nov 2026
30
1,077.84
Dec 2026
14
503.02
Total
334
12,000.00
∕∕ LIVE · NO ACCOUNT · RESULTS STAY ON DEVICE
Open full calculator Try it — edit any value above
Three steps. No login. No saved data.
02
COMPUTE
Day-exact, per period
Each day of the service period gets an equal share, grouped by month, quarter or fiscal year. The last period carries the rounding difference, so the periods add up to the invoice exactly.
03
OUTPUT
Export to your ledger
Download the audit trail as PDF, CSV or Excel, with the full calculation and suggested entries for prepaid expenses or deferred revenue.
An annual service fee of CHF 36,000, starting Nov 1, 2026.
Monthly allocation
365 days · CHF 98.63 / day
FY 2026 FY 2027
Nov
2,959
Dec
3,058
Jan
3,058
Feb
2,762
Mar
3,058
Apr
2,959
May
3,058
Jun
2,959
Jul
3,058
Aug
3,058
Sep
2,959
Oct
3,058
§03 standards
- Swiss CO art. 958bAccrual principle
- Swiss CO art. 959aAccruals on the balance sheet
- HGB §§ 250, 252Prepaid and deferred items
- IFRS 15Revenue from contracts with customers
- Swiss GAAP FERFramework, FER 3
What controllers tend to ask first.
01Is BillSplitter compliant with Swiss accounting standards?–
Yes, in the sense that the calculation follows the accrual principle: Swiss CO art. 958b, HGB § 252(1) no. 5 and § 250, and IFRS 15 for revenue earned over time. Amounts are split day-exact on calendar days. Judgment on individual cases and the audit stay with you and your auditor; the tool gives them figures that reconcile to the cent.
02Where is my data stored?+
Nowhere. Every calculation runs locally in your browser: amounts, dates and line items never leave it and never reach our servers. If you accept analytics cookies, we measure only which pages are viewed and which features are used, such as a PDF export, never the values you enter. You can close the tab and no record remains.
03How are rounding differences handled?+
Each period is rounded to the cent. The rounding difference, usually a few cents, goes to the last period, so the periods add up to the invoice amount exactly. The calculation steps show it line by line.
04Can I split quarterly, annually, or by fiscal year?+
All three, with the switch month · quarter · year. Fiscal years follow the calendar year by default; in the full calculator you pick another fiscal year end, June 30 for example.
05Do you support multi-line invoices and foreign currency?+
Multi-line, yes: add as many line items as you need in the full calculator. Each invoice is calculated in one currency, without conversion; set the currency in the settings.
06How do I export results for my auditor?+
One click: PDF with the calculation steps and the method, CSV (one row per period) or Excel (with the suggested year-end entry when an invoice spans the closing date). Nothing is uploaded; the file is created in your browser.
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