Legal Payment Terms for Invoices: Business Guide

When you start your own business, you face new challenges. How do you create an invoice step by step? What mandatory information should be included on this document to ensure it’s in order?

Key Takeaways

• When you start your own business, you face new challenges.
• Understanding legal payment terms for invoices helps businesses get paid faster and stay compliant.
• Running a business involves managing various numbers.

Payment deadlines: what the law says

The law regulates the invoicing of professionals to ensure a balanced and transparent commercial relationship.

Payment deadlines for an invoice addressed to an individual

When an invoice is intended for an individual, the payment deadline is not regulated by law.

However, several common practices exist:

• Payment is often required upon delivery or when the service is performed.;
• other payment terms agreed between you and the individual: payment in installments, deposit before delivery, etc.

Payment deadlines for an invoice sent to a professional

For an invoice issued to another professional, the law more strictly regulates payment deadlines.

As a general rule:

• The standard payment period is 30 days after receiving the goods or service;
• This period can be extended to 60 days from invoicing or to 45 days end of month.

For the period of 45 days from the end of the month, there are 2 calculation methods:

• For the 45-day end-of-month period, there are two calculation methods. One method is to add 45 days to the end of the month when the invoice was issued. For example, an invoice issued on May 10 must be paid before July 15.

How to Choose the Right Payment Terms for Your Invoices

Running a business involves managing various numbers.

When setting payment terms on your invoices, it is crucial to consider:

• your cash flow;
• your client’s financial capabilities;
• the nature of the business relationship.

Some concrete examples:

If you’re a freelancer just starting out you probably need a quick cash flow. In this case, prioritize short payment terms.

If your client is a small business with limited resources, a longer payment term may be beneficial in strengthening your business relationship.

And if you work with regular clients and your cash flow is stable, you may want to consider more flexible payment terms. This will help you negotiate better terms in upcoming contracts.

Payment deadlines & invoicing: the recap

Now you know how to set the payment deadline on your invoices :

• the legislative framework gives you different possibilities between payment on receipt, or settlement in 30, 45 or 60 days;
• the setting of the deadline must be based on concrete elements specific to the financial capacities of the different parties.

To put these terms into practice with less manual work, use invoicing software that lets you save default terms, automate reminders, and keep a clean history if you ever need to escalate late payers.

International clients and cross-border payment terms

Legal payment terms for invoices become more complex when the customer sits in another country. Beyond your domestic default (30/45/60 days), consider:

• Currency — State whether the amount is in your home currency or the client’s, and who bears conversion or wire fees.
• Tax and VAT rules — Reverse charge, VAT IDs, and invoice fields differ by jurisdiction; align wording with your accountant before you standardize a template.
• Wire timelines — International ACH/SEPA/SWIFT transfers can take several business days; your “due date” might need to mean “funds received by” versus “invoice dated.”
• Late-fee enforceability — Statutory interest and maximum penalties vary; copy-pasting domestic clauses into a foreign contract may not hold up.

When in doubt, reference the governing law section of your contract and keep written acceptance of terms (email or e-sign) before large deliverables ship.

Enforceability: what makes invoice terms hold up?

Courts and collection agencies care whether both sides understood the deal. Strengthen enforceability by:

• Publishing general terms (or a master services agreement) before work begins, not only on the first invoice.
• Making due dates, late fees, and interest explicit on every invoice line or footer—not buried in a PDF clients never open.
• Keeping proof of delivery and read receipts where available, especially for high-value work.
• Using consistent invoice numbering so you can prove chronology; see invoice numbering best practices.

Even strong terms may be hard to enforce against insolvent clients; credit checks, deposits, and milestone billing remain practical risk tools alongside legal wording.

Late fees, statutory interest, and reminders

Late fees should be stated as a flat amount or a percentage per period, with a clear start date (e.g., “after Net 30”). Pair fees with a reminder sequence: polite before the due date, firm after, then final notice referencing the clause that applies.

Many jurisdictions cap commercial late-interest rates or prescribe statutory formulas for B2B debts. Your accountant or counsel can tell you whether to reference a statutory rate, a contract rate, or both. Whatever you choose, apply it consistently—selective penalties invite discrimination claims.

Document each reminder in your invoicing tool so, if you escalate, you can show a good-faith effort to collect before involving third parties.

Frequently Asked Questions

What Are the Legal Time Limits for Paying Professional Invoices?

The standard legal payment period for an invoice to a professional is 30 days after receiving goods or services. However, this period can be extended. It can be 60 days from the invoicing date. Alternatively, it can be 45 days from the end of the month.

How do I set the payment term that best suits my business?

The choice of payment term depends on many factors: the nature of your activity, your business model, the financial situation of your customers, etc. You can consult an accountant or financial advisor to help you determine the payment terms best suited to your business.

What happens if a customer does not meet the agreed payment deadline?

If your customer fails to meet the agreed payment deadline, you have the right to claim late payment penalties. The conditions of application and the interest rate of these penalties must be specified in your general terms and conditions of sale (GTC) .

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Related resources: Learn about invoice numbering best practices and explore Billed's recurring invoices to automate payment schedules. For collection workflows, see how to follow up on unpaid invoices.