Invoice Due Date Calculator
Free invoice due date calculator: pick an invoice date and payment terms - Net 15, 30, 45, 60, or EOM - to get the exact due date and days remaining.
Defaults to today.
Net N = due N calendar days after the invoice date.
Results
Due date
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Enter an invoice date to compute the due date.
Pick the invoice date and payment terms to see the exact due date and how many days remain.
Free and instant - nothing is stored or sent. Estimates for planning purposes, not accounting, tax, or investment advice.
"Net 30" sounds simple until you are staring at a calendar on the 31st of a month wondering whether the invoice is overdue. This calculator turns any invoice date and standard payment terms into an exact due date and counts the days remaining - or overdue - from today.
Use it when setting terms on outgoing invoices, checking whether a customer payment is late, or scheduling your own vendor payments to preserve cash without breaching terms.
How payment terms translate to dates
"Net N" means the full amount is due N calendar days after the invoice date - calendar days, not business days, unless the contract says otherwise. An invoice dated July 1 on Net 30 terms is due July 31.
"EOM" (end of month) makes payment due on the last day of the month the invoice was issued. Some vendors use variants like "Net 30 EOM" (30 days after month-end); when a contract uses a variant, the written contract governs, so this calculator sticks to the two unambiguous standards.
Choosing terms that protect your cash
Every day of payment terms is a day of free financing you extend to the customer. Net 30 is the most common default in US B2B, but shorter terms are normal for small invoices and new relationships - and "due on receipt" is perfectly acceptable for many services.
Two practices commonly pull cash forward: invoicing the same day work completes (every day of invoicing delay adds a day to collection), and a reminder sent a few days before the due date, which converts "forgot" from an excuse into a rarity.
When the due date passes
An invoice one day past due should trigger a friendly follow-up with the original invoice attached - most late payments are process failures, not disputes. Escalate steadily: a second notice at 15 days, a call at 30, and a decision point (stop work, collections, or write-off analysis) by 60–90.
Track your receivables aging by bucket (current, 1–30, 31–60, 61–90, 90+) at every month-end close. The 90+ bucket is where invoices go to die - the older a receivable gets, the less of it you should expect to collect.
Frequently asked questions
What does Net 30 mean on an invoice?
Payment of the full amount is due 30 calendar days after the invoice date. An invoice dated July 1 with Net 30 terms is due July 31. Unless the contract specifies business days or a different trigger date (like receipt of goods), calendar days from the invoice date is the standard reading.
Does Net 30 count from the invoice date or the delivery date?
By default, from the invoice date. Some customers negotiate terms that run from receipt of invoice or receipt of goods - if so, that belongs in the written agreement. This is exactly why invoicing immediately upon delivery matters: a late invoice silently extends the customer’s terms.
What does EOM mean in payment terms?
End of month: the invoice is due on the last day of the month in which it was issued. An invoice dated July 10 with EOM terms is due July 31. Watch for hybrids like "Net 30 EOM" (due 30 days after month-end) - the written contract controls when variants are used.
Can I charge late fees on overdue invoices?
Generally yes, if the fee was disclosed in your contract or invoice terms before the sale - a common formulation is 1–1.5% per month on overdue balances. State laws cap allowable rates, so confirm the limit in your state. In practice, the fee’s main value is as negotiating leverage for prompt payment.
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