Quarterly Estimated Dates

Generate quarterly estimated-tax dates and move them past weekends and supplied holidays.

Description

Calendar-year estimated payments use several nominal due dates, with nonbusiness days potentially shifting them forward.

Calendar-year estimated payments use several nominal due dates, with nonbusiness days potentially shifting them forward. A schedule needs the correct jurisdictional holiday list.^{[1, 2]}

Generate quarterly estimated-tax dates and move them past weekends and supplied holidays.

When to use Quarterly Estimated Dates

Use this tool to generate quarterly estimated-tax dates and move them past weekends and supplied holidays.

Choose the specific arithmetic or checklist scenario and establish its input amounts, dates, rates and criteria from the applicable records. Keep currencies, periods and jurisdictions consistent; review the tool-specific assumptions before interpreting the result.

How to use Quarterly Estimated Dates and understand its results

Choose the specific arithmetic or checklist scenario and establish its input amounts, dates, rates and criteria from the applicable records. Keep currencies, periods and jurisdictions consistent; review the tool-specific assumptions before interpreting the result.
Enter taxYear, nonBusinessDates using the field table and calculation rules, then run the tool.
Read adjustedDueDates. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
taxYear	Tax year	integer; minimum: 1900; maximum: 9998	Required
nonBusinessDates	Additional nonbusiness dates	list of string	Required

Enter a year from 1900 through 9998 and date strings for additional nonbusiness days. Generate four nominal dates and advance each past UTC Saturdays, Sundays and exact matching exclusion strings.

nominal dates=April 15, June 15, September 15, following January 15; shift forward past weekends and supplied exclusions

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
adjustedDueDates	Adjusted quarterly due dates	list of string

json

{
  "input": {
    "taxYear": 2025,
    "nonBusinessDates": []
  },
  "output": {
    "adjustedDueDates": [
      "2025-04-15",
      "2025-06-16",
      "2025-09-15",
      "2026-01-15"
    ]
  }
}

Limitations and assumptions

No holiday calendar or disaster relief is fetched. Exclusion strings are matched literally without date validation; this schedule does not cover every taxpayer, fiscal year or special payment rule.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Deadline Business-Day Shift: Move a nominal deadline forward past weekends and caller-supplied nonbusiness dates. For a complementary task, use Relief Deadline Shift: Shift a filing deadline by a caller-supplied disaster-relief postponement.

Further background: Estimated Taxes.

References

Quarterly Estimated Dates — tool.io
Estimated Taxes — Internal Revenue Service

Similar or alternative tools

Deadline Business-Day Shift
Move a nominal deadline forward past weekends and caller-supplied nonbusiness dates.
Relief Deadline Shift
Shift a filing deadline by a caller-supplied disaster-relief postponement.