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Business Day Calculator

Net 90 Calculator - Find Your Payment Due Date

Calculate the exact Net 90 due date for any invoice. Net 90 traditionally means 90 calendar days, the default mode in this calculator and the standard convention in enterprise and government contracts. If your contract specifies business days, use the toggle above the date input to switch modes; the calculator skips weekends and public holidays for your selected country.

Net 90 is common in government procurement, construction, large retail, and enterprise software, industries where invoice approval, budget cycles, or seasonal cash flow justify a longer payment window. At 90 business days, the result runs roughly 18 working weeks, or close to four and a half months of calendar time. For both suppliers chasing payment and buyers managing cash flow, pinning down the exact due date matters. This calculator does that instantly.

Net 30 Calculator →Net 60 Calculator →Invoice Due Date Calculator →SLA Deadline Calculator →Late Payment Interest →

For informational purposes only

This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.

Frequently Asked Questions

What does Net 90 mean?
Net 90 is a payment term requiring payment within 90 days of the invoice date. Traditionally and in most enterprise and government contracts, this means 90 calendar days (about 3 months), which is the default mode in this calculator. Some contracts specify 90 business days instead (about 4.5 months); use the toggle above the date input to switch modes.
How long is Net 90 in months?
90 calendar days is approximately 3 months. 90 business days is approximately 18 calendar weeks (roughly 4–4.5 months). The exact calendar date depends on weekends and holidays in the specific period.
Is Net 90 common?
Net 90 is used in construction, government procurement, large retail, pharmaceutical distribution, and enterprise software contracts. It is less common than Net 30 or Net 60 but standard in industries with long procurement cycles or seasonal inventory patterns.
How do I add an early payment discount to Net 90?
A common structure is '2/10 Net 90': a 2% discount if paid within 10 days, otherwise full payment is due in 90 days. Calculate the 10-day result for the discount deadline and the 90-day result for the final due date.
How is Net 90 different from quarterly payment?
Quarterly payment is tied to fixed calendar quarters (January–March, April–June, etc.) regardless of when the invoice was issued. Net 90 starts counting from the specific invoice date. Both cover roughly 3 months, but the trigger and anchor dates differ.
What should I do if my Net 90 payment is late?
Check your contract for late payment interest provisions; many B2B contracts include a daily or monthly interest rate on overdue balances. Document the due date calculated from the invoice, any grace period in the contract, and send a formal reminder referencing both.