Net 45 Calculator
Find an invoice's due date under Net 45 payment terms—45 calendar days from the invoice date, with optional weekend adjustment.
Due date
ExampleSeptember 15, 2025
2025-09-15 · UTC
Based on
- Invoice date
- 2025-08-01
- Terms
- Net 45
- If weekend
- Keep calendar date
Weekend adjustment uses UTC weekdays only (not holiday calendars).
More detail
- Weekend
- Due date is a weekday
Next step: Net 15 Calculator
When to use this calculator
Use this calculator when an invoice or contract states Net 45 terms and you need the exact due date without selecting the term from a dropdown.
Extended vendor terms
Find the due date for an invoice issued under longer-than-standard Net 45 terms.
Accounts receivable aging
Confirm when payment is expected under an extended payment cycle to track aging.
Accounts payable scheduling
Confirm when a vendor invoice on extended terms must be paid.
Other net terms
Use the Net 15 Calculator, Net 30 Calculator, Net 60 Calculator, or the Invoice Due Date Calculator for other terms.
Inputs
Invoice date
The date the invoice was issued—the day the 45-day term counts from, unless your agreement states a different start date.
Weekend handling
None (keep the raw calendar due date), shift to the next business day, or shift to the previous business day, applied only when the due date falls on a Saturday or Sunday.
How the calculation works
Net 45 means payment is due 45 calendar days after the invoice date. Enter the invoice date and the calculator adds 45 calendar days on the UTC calendar, using the same engine as the Invoice Due Date Calculator.
Weekend handling is optional. When the due date falls on a Saturday or Sunday, you can leave it unchanged, move it to the next business day, or the previous business day. Adjustments follow UTC weekdays only and do not apply US holiday lists.
Worked example
Invoice date: Monday 3 March 2025. Weekend handling: none.
Due date: 3 March + 45 calendar days = Thursday 17 April 2025.
If the invoice were instead dated Wednesday 8 January 2025, the raw due date would be Saturday 22 February 2025—with 'next business day' selected, the adjusted due date moves to Monday 24 February.
Edge cases
Due date on a weekend
With a 45-day term, roughly 2 in 7 invoice dates produce a due date landing on a weekend. Enable weekend handling if your policy adjusts these automatically.
Holidays are not excluded
Weekend adjustment only checks Saturday and Sunday. A due date on a weekday public holiday is not moved by this calculator.
Crossing month or quarter boundaries
A 45-day span usually crosses at least one full month; watch for the due date landing in a different quarter than the invoice date when it matters for reporting periods.
Related Finance & Billing Calculators
The Net Payment Terms Guide is the primary reference for what Net 10, Net 15, Net 30, Net 45, Net 60, and Net 90 mean, and how calendar vs business days affect an invoice due date.
The Invoice Due Date Guide explains how invoice due dates are calculated step by step, including weekend handling and common mistakes with start dates.
The Invoice Due Date Calculator finds a due date from any invoice date and payment term—Net 7, Net 10, due on receipt, or a custom day count—with optional weekend adjustment.
The Net 15 Calculator, Net 30 Calculator, Net 45 Calculator, and Net 60 Calculator are fixed-term shortcuts for the same due-date math, for the most commonly searched payment terms.
The How Prorated Rent Is Calculated guide and Prorated Rent Calculator cover partial-month rent for a move-in or move-out date that falls mid-billing-period, using the same daily-rate proration logic as prorated salary.
For accounts-payable timing that depends on business days rather than calendar days, see the Business Days Calculator and Add Business Days To Date Calculator in Date & Business Days.
For contract terms tied to invoicing or billing—renewal windows and end dates—see the Contract End Date Calculator in Contracts & Legal.
FAQ
- What does Net 45 mean?
- Net 45 means the full invoice amount is due 45 calendar days after the invoice date, with no early-payment discount implied.
- How is this different from the Invoice Due Date Calculator?
- Same underlying due-date math—no new calculation—fixed to Net 45 instead of requiring you to pick from a dropdown.
- What if the due date falls on a weekend?
- By default the calendar due date is kept as-is. You can optionally move it to the next or previous business day using UTC weekdays.
- Are weekends included in the 45-day count?
- Yes. Net 45 uses calendar days, so all seven days of the week count toward the forty-five days—only the resulting due date, not the day count itself, can be shifted off a weekend.
Related Guides
- Net Payment Terms GuideLearn what Net 30, Net 15, and other payment terms mean, how invoice due dates are calculated, and when calendar days differ from business days.
- Invoice Due Date GuideLearn how invoice due dates are calculated from payment terms, when calendar vs business days apply, and how to handle weekend due dates with DateToolsHQ.
Similar Tools
- Net 15 CalculatorFind an invoice due date 15 calendar days from the invoice date, with optional weekend adjustment.
- Net 30 CalculatorFind an invoice due date 30 calendar days from the invoice date, with optional weekend adjustment.
- Net 60 CalculatorFind an invoice due date 60 calendar days from the invoice date, with optional weekend adjustment.
- Invoice Due Date CalculatorCalculate invoice due dates from net payment terms with optional weekend adjustment.
- Prorated Rent CalculatorEstimate prorated rent for partial-month move-in or move-out dates.
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