Fiscal period calculator — fiscal year, quarter and period
Find the fiscal year, quarter and period for any date from your fiscal year start month. Supports 4-4-5 retail calendars and lists every period boundary.
Free · no signup · runs in your browser·Updated
Short answer
A fiscal period is the accounting month inside a fiscal year that starts in a month you choose. With a July start, 2026-05-14 falls in fiscal year 2026, quarter 4, period 11, which runs 2026-05-01 to 2026-05-31 with 14 days elapsed and 17 remaining. Retail 4-4-5 calendars count whole weeks instead of calendar months.
This fiscal period calculator turns a date into the fiscal year, quarter and period your accounting calendar would post it to. Set the month your fiscal year opens, enter a date as YYYY-MM-DD, and it returns the period number, that period's first and last day, how many days have elapsed and how many are left.
Retail and manufacturing businesses that close on weeks rather than months can switch to a 4-4-5 calendar. Give it the date the fiscal year begins, the week pattern, and whether the year runs 52 or 53 weeks, and it lays out all twelve period boundaries.
Your numbers
Calendar type
Written as YYYY-MM-DD. Read literally — the calculator never uses today's date.
January means the fiscal year matches the calendar year.
Fiscal year is labelled by
Result
Fiscal year and period
FY2026 P11
Q4 · 2026-05-01 to 2026-05-31 · 31 days
Fiscal yearFY2026 · 2025-07-01 → 2026-06-30
QuarterQ4 · 2026-04-01 → 2026-06-30
Period number11 of 12
Days elapsed in the period14 of 31
Days remaining in the period17
Progress through the fiscal year318 of 365 · 87%
Period boundaries for FY2026, calendar months.
Period
Starts
Ends
Days
Quarter
P1
2025-07-01
2025-07-31
31
Q1
P2
2025-08-01
2025-08-31
31
Q1
P3
2025-09-01
2025-09-30
30
Q1
P4
2025-10-01
2025-10-31
31
Q2
P5
2025-11-01
2025-11-30
30
Q2
P6
2025-12-01
2025-12-31
31
Q2
P7
2026-01-01
2026-01-31
31
Q3
P8
2026-02-01
2026-02-28
28
Q3
P9
2026-03-01
2026-03-31
31
Q3
P10
2026-04-01
2026-04-30
30
Q4
P11 (this date)
2026-05-01
2026-05-31
31
Q4
P12
2026-06-01
2026-06-30
30
Q4
fiscal year starts in month 7 (July)
date is in calendar month 5
period = ((5 − 7 + 12) mod 12) + 1 = 11
quarter = ceil(11 ÷ 3) = 4
fiscal year 2025-07-01 → 2026-06-30, labelled by the year it ends = FY2026
day 318 of 365 · period day 14 of 31
14 of 31 days into period 11, with 17 to go and 1 period left in FY2026 after this one. Any daily-rate metric for this period divides by 31 actual days, never a flat 30.
Everything is computed in your browser. Nothing you type is sent anywhere or stored.
The formula
Period = ((Calendar month − Fiscal year start month + 12) mod 12) + 1
Calendar month
The month of the date you are looking up, 1 to 12.
Fiscal year start month
The calendar month your fiscal year opens in, 1 to 12. January means the fiscal year matches the calendar year.
mod 12
The remainder after dividing by 12, which wraps the count around the end of the calendar year.
Quarter is then ceil(period ÷ 3). The fiscal year label is a separate convention: most organisations label the year by the calendar year it ends in, so a year running July 2025 to June 2026 is FY2026, while retail 4-4-5 years are usually labelled by the year they begin in.
Worked example
Fiscal year starts
July
Date
2026-05-14
Calendar type
Calendar months
Year labelled by
The year it ends
Result
FY2026, quarter 4, period 11
May is month 5 and the fiscal year opens in month 7, so ((5 − 7 + 12) mod 12) + 1 = 11. Period 11 puts the date in quarter 4, the last quarter of the year. The period runs 2026-05-01 to 2026-05-31, so 2026-05-14 is day 14 of 31 with 17 days left. The fiscal year itself runs 2025-07-01 to 2026-06-30, making this day 318 of 365.
How this fiscal period calculator maps a date to a period
Subtract the fiscal year start month from the date's calendar month, wrap the result around 12, and add one. A July start puts July in period 1 and June in period 12. Quarters are then just periods in groups of three, and the fiscal year a date belongs to is the previous calendar year whenever the date's month sits before the start month.
The part that causes arguments is the label. A year running July 2025 to June 2026 is FY2026 to almost everyone in finance, because the convention is to name the year by when it ends. Retail is the loud exception: a 4-4-5 year opening in February 2026 is FY2026, named by when it begins. Both conventions are available above; pick the one your board deck already uses.
Fiscal year starts
So FY2026 covers
Where you see it
1 January
Jan 2026 – Dec 2026
Most private companies, and the default in most charts of accounts.
1 April
Apr 2025 – Mar 2026
Indian and Japanese corporate reporting; UK government accounts.
1 July
Jul 2025 – Jun 2026
Australia and New Zealand; many universities and non-profits.
1 October
Oct 2025 – Sep 2026
The US federal government and the contractors who bill it.
Sunday nearest 1 February
52 or 53 weeks from Feb 2026
US retail, on a 4-5-4 or 4-4-5 week calendar.
Five common conventions. The maths is identical; only the start month and the label move.
What a 4-4-5 calendar actually does
A 4-4-5 calendar throws away calendar months and builds each quarter out of thirteen whole weeks: a four-week period, another four-week period, then a five-week period. Every period starts and ends on the same weekday, so period-over-period comparisons hold the same number of Saturdays — which matters enormously if most of your revenue happens at the weekend.
Pattern
Weeks per period in a quarter
Effect on the quarter
4-4-5
4, 4, 5
The long period lands at quarter end, alongside the close.
4-5-4
4, 5, 4
The long period sits mid-quarter. This is the shape the US retail calendar publishes.
5-4-4
5, 4, 4
Front-loads the quarter, which suits a business whose season opens in the first period.
All three give a 91-day quarter and a 364-day year. Only the placement of the five-week period changes.
Twelve periods of four or five weeks come to 364 days, one short of a calendar year. The drift accumulates, so roughly every five or six years a 53rd week is added — normally to the final period, which is the option offered above.
Why period boundaries matter more than they look
Posting period is not transaction date. An invoice dated 2026-05-31 can post to period 12 if period 11 was already closed. Reports filtered by date and reports filtered by period will not agree, and only one of them ties to the general ledger.
Averages need the period length. A 35-day 4-4-5 period next to a 28-day one makes daily-rate metrics like DSO or inventory turns jump for no operational reason. Divide by actual days in the period, never by 30.
Accruals follow the boundary. Anything measured per day — rent, interest, subscription revenue — has to be cut at the period end date, not the month end date, once those two stop being the same thing.
Budgets get loaded by period, not by month. A calendar-month budget dropped into a 4-4-5 ledger produces variances in every period even when spending is exactly on plan.
Once the calendar is non-standard, every ad-hoc question becomes a date-arithmetic problem before it becomes a reporting problem. With ERPray you ask "revenue by fiscal period for FY2026 against FY2025" and the period boundaries come from your own accounting-period records, with the query shown so you can confirm which calendar it used. Pair it with the business days calculator when the deadline you care about is a close task rather than a period end.
Frequently asked questions
What is a fiscal period?
A fiscal period is one accounting interval inside a fiscal year — usually a calendar month, so twelve periods a year. Transactions post to a period, the period is then closed, and reports run against periods rather than dates. Some ledgers add a thirteenth adjustment period for year-end entries that should not disturb December.
How do you work out the fiscal quarter from a date?
Find the period number first: subtract the fiscal year start month from the date's month, add 12, take the remainder on division by 12, then add 1. Divide that period by 3 and round up. With a July start, May gives period 11 and therefore quarter 4.
What is a 4-4-5 calendar?
A fiscal calendar where each quarter is thirteen weeks split into periods of four, four and five weeks. Periods always end on the same weekday and always contain the same number of weekends, which makes period-over-period sales comparisons meaningful. The cost is that periods no longer line up with calendar months.
Why does fiscal year 2026 include months in 2025?
Because most organisations name a fiscal year after the calendar year it ends in. A year that opens on 1 July 2025 and closes on 30 June 2026 is FY2026, so its first six periods sit in calendar 2025. Retail 4-4-5 calendars usually do the opposite and label by the opening year.
What is a 53-week fiscal year?
Twelve periods of four or five whole weeks total 364 days, so a week-based calendar loses roughly a day a year against the sun. Every five or six years an extra week is inserted, normally into the last period, to pull the year end back into place. That year is 1.9% longer and needs care in any comparison.
Can two fiscal calendars run in the same company?
Yes, and it is common after an acquisition: the parent reports on calendar months while the acquired entity runs 4-4-5. Consolidation then requires one of them to be restated, usually the smaller entity. Keep the mapping between the two calendars explicit and version it, because reconciling by hand each period does not scale.
This calculator needs you to find the inputs first. ERPray pulls them from your own ERP account and computes the answer live — with the exact query shown so you can check it.