DueDate

DueDate calculator

Payment Terms Calculator

Type a payment term and an invoice date to get the due date and any early-payment discount date.

Need this in your software? Get a free API key (1,000 requests a month, no card).

Disclaimer: Results are computed from open-source holiday data and general conventions and may be incomplete or wrong (for example, regional, ad-hoc or newly declared holidays). They are not legal or financial advice. Verify any contractual, statutory or legally binding deadline against an official source before relying on it. API spec · Pricing & API keys

Supported payment term formats

Worked examples for an invoice dated November 10, 2026 (US holidays)

Guides for specific terms: Net 30, Net 60, Net 90, EOM, 2/10 Net 30, Net 30 BD.

The same calculation is available as a JSON API, so you can run it inside an accounting, ERP or workflow system. Get a free API key (1,000 requests a month) or read the OpenAPI spec.

Holiday data comes from an open-source dataset and may be incomplete, especially for regional, ad-hoc or newly declared holidays. Check legally or financially critical deadlines against an official source.

Frequently asked questions

What payment terms does this support?

Net N, Net N BD, EOM, EOM+N, X/Y Net N and X/Y EOM.

How are weekends and holidays handled?

Calendar-day terms are counted straight through and only the final date is adjusted, by the rule you choose. Business-day terms skip weekends and holidays as they count.

Can I calculate many invoices at once?

Yes, through the API, which has a batch endpoint. A free key includes 1,000 requests a month.