Fiscal Year Allocation Calculator
Cross-fiscal-year invoice and contract splits with day-exact math. Handles calendar years, June 30 year-ends, March 31 year-ends, and any custom fiscal year configuration. Free, instant, no signup.
When fiscal year boundaries matter
Most service contracts don't respect fiscal year-ends. They start when the customer signs and run however long the agreement dictates. Your accounting has to reconcile the mismatch.
The easy case: contract spans one fiscal year. The whole amount recognizes in that year. Done.
The common case: contract crosses one or more fiscal year-ends. Requires day-exact allocation per fiscal year. This is where this calculator earns its keep.
Worked examples by fiscal year-end
Calendar year (December 31)
Invoice: CHF 24,000. Service: 2024-07-01 to 2025-06-30. Year-end: Dec 31.
- FY2024: Jul 1 – Dec 31 = 184 days → (184/365) × 24,000 = CHF 12,098.63
- FY2025: Jan 1 – Jun 30 = 181 days → (181/365) × 24,000 = CHF 11,901.37
Swiss fiscal year (June 30 year-end)
Invoice: CHF 24,000. Service: 2024-07-01 to 2025-06-30. Year-end: Jun 30.
- FY2024-25: Jul 1 2024 – Jun 30 2025 = 365 days → CHF 24,000 (one fiscal year)
Notice how changing the fiscal year-end changed the allocation from a two-period split to a single-period recognition — the same service contract, different allocations, both correct for the respective year-end convention.
UK fiscal year (April 5 year-end — personal tax)
Prepaid annual service: GBP 12,000. Service: 2024-09-01 to 2025-08-31. Year-end: Apr 5.
- FY2024-25: Sep 1 2024 – Apr 5 2025 = 217 days → (217/365) × 12,000 = GBP 7,134.25
- FY2025-26: Apr 6 2025 – Aug 31 2025 = 148 days → (148/365) × 12,000 = GBP 4,865.75
What makes fiscal year allocation hard
- Leap years. A 366-day period (FY 2024 is a leap year if calendar-based) must be split by 366 not 365.
- Mid-fiscal-year changes. Companies sometimes change year-ends. A transitional short fiscal year (e.g., 7 months) needs special handling.
- Rounding errors. Day-based proration almost always produces irrational cents. The last period has to absorb the rounding to keep the total exact.
- Audit documentation. The allocation methodology needs to be reproducible. Hand-rolled Excel is fragile; this tool produces the same answer every time with the same inputs.
Related tools
- Invoice prorate calculator — focused on splitting a single invoice across periods.
- Revenue recognition calculator — framed around recognition schedules.
- IFRS 15 calculator — framed around the IFRS 15 five-step model.
- General prorate calculator — non-accounting proration use cases.
Frequently asked questions
What is fiscal year allocation?
The practice of splitting an amount — typically an invoice or contract value — across multiple fiscal years based on when the underlying service or good is delivered. It's essential for accrual accounting when contracts or invoices don't align neatly with fiscal year boundaries.
Why does fiscal year allocation matter if my company uses a calendar year?
Because contracts don't care about your fiscal year. A 12-month SaaS contract signed on April 15 spans two of your calendar fiscal years: April-Dec of year 1, Jan-April of year 2. Allocation across that boundary is what keeps your revenue recognition clean and your deferred revenue balance correct at year-end close.
Can this handle custom fiscal year-ends (not December 31)?
Yes. Common custom year-ends: Swiss companies often use June 30 or March 31. UK companies often use April 30 or March 31. Japanese companies typically use March 31. US retail uses late January / early February. BillSplitter accepts any year-end date and computes the allocation correctly.
What about short fiscal years (for a company's first year, or a year-end change)?
BillSplitter doesn't have explicit short-year support, but you can compute it manually: set the start of the short year as the fiscal year start and the new year-end as the end. The tool splits based on whatever dates you give it — the day-count math is agnostic to whether a period is a 'standard' length.
Does the tool handle non-contiguous fiscal periods (e.g., a service paused and restarted)?
No. BillSplitter assumes a single contiguous service period. If a service was paused — say, Jan-Apr, then resumed Jul-Dec — run the tool twice (once per active window) and sum the results. That said, this is rare in practice; most accounting contracts assume continuous service.
Does it account for holidays or working days?
No — it uses calendar days. IFRS 15 and ASC 606 don't require working-day accounting; the services you're allocating typically run 365 days a year (SaaS is always on, rent accrues Sunday and Christmas). If you're allocating a working-day-denominated obligation (e.g., consulting days), divide by working days manually and use the result as your amount.
How precise is 'day-exact'?
Fractions of a day aren't meaningful for fiscal allocation — accounting contracts run full days. BillSplitter rounds period amounts to 2 decimals (2 smallest units of the currency), then adjusts the final period by the accumulated rounding error so the total sums to the input amount. Maximum error per period: ±0.01 currency units. Cross-period sum: exactly the input.