For most freelancers, use due on receipt or net 7 for small jobs and net 30 for larger clients, and make your terms enforceable by agreeing them in the quote or contract before the work starts. Payment terms are the rules that tell your client when and how to pay. Getting them clear on every invoice is one of the simplest ways to get paid faster and avoid awkward chasing later. This guide explains the common terms, how to choose the right one, how to add a late payment clause, and what your options are if a client in Singapore still does not pay.
Common payment terms explained
You will see a handful of standard terms again and again:
- Due on receipt: payment is expected as soon as the invoice arrives. Best for small jobs, one-off work, or new clients you have not worked with before.
- Net 7: payment due within 7 days. A good balance of promptness and reasonableness for freelancers.
- Net 15: payment due within 15 days. Common for ongoing freelance and service work.
- Net 30: payment due within 30 days. Standard for larger companies whose finance teams run on monthly cycles.
One tip that helps enormously in Singapore and across Southeast Asia: write the actual due date in plain words as well as the term. "Payment due by 18 July 2026" is clearer than "Net 30" to a client who does not work in finance, and clarity gets you paid.
How to choose the right term
Match the term to the client and the job. For a small, quick piece of work, due on receipt or net 7 keeps your cash flow healthy. For a corporate client with a formal accounts payable process, net 30 is often unavoidable, so build that wait into your own planning. For large projects, do not rely on a single payment term at all. Instead, ask for a deposit upfront, then bill the balance on completion or in milestones. That protects your cash flow and reduces the amount at risk if a client goes quiet.
Adding a late payment clause
A late payment clause sets expectations before anything goes wrong. You might state that overdue invoices attract a late fee or interest, for example a small percentage per month on the outstanding amount, or a flat administrative fee after a grace period. To be enforceable, the client needs to have agreed to it, so put your payment terms and any late fee in your quote or contract as well as on the invoice, not just at the bottom of a document they see after the work is done. A clause that was agreed in advance carries far more weight than one that appears for the first time on an overdue invoice.
Enforcing terms in Singapore
Most late payments are resolved with a polite reminder, so start there. If reminders do not work, the usual escalation is a firmer written reminder, then a formal letter of demand stating the amount owed and a deadline. If the debt is still unpaid, Singapore has an accessible route for smaller amounts: the Small Claims Tribunals handle many business claims quickly and affordably, without the need for a lawyer, up to a set limit that can be raised if both parties agree. For larger debts, you may need legal advice. The key point is that clear, agreed terms and good records, your invoice, the accepted quote, and any messages confirming the work, make enforcement far easier if it ever comes to that.
Putting it into practice
Decide your default terms once, state them in your quotes and contracts, and repeat them on every invoice with a real due date. Be a little stricter with new clients and more flexible with trusted long-term ones. When terms are clear and consistent, most clients simply pay on time, and the rare late payer is much easier to deal with.
Set clear payment terms on every invoice.
The free invoice generator lets you set a due date and payment terms in seconds, so there is never any ambiguity. No signup needed. Create a Free Invoice →Frequently Asked Questions
What does net 30 mean on an invoice?
Net 30 means the full payment is due within 30 days of the invoice date. Net 15 and net 7 work the same way with 15 and 7 days. Due on receipt means payment is expected as soon as the invoice is received. Writing the actual due date in plain words alongside the term helps clients pay on time.
What payment terms should a freelancer use?
Match the term to the client and job. Due on receipt or net 7 suits small or one-off work and protects your cash flow, while net 30 is common for larger companies with monthly finance cycles. For big projects, ask for a deposit upfront and bill the balance on completion or in milestones.
Can I charge a late fee on an unpaid invoice?
You can, but it needs to have been agreed in advance to be enforceable. State your late fee or interest in your quote or contract as well as on the invoice. A late fee the client accepted before the work started carries far more weight than one that first appears on an overdue invoice.
What can I do if a client in Singapore does not pay?
Start with a polite reminder, then a firmer written reminder, then a formal letter of demand with a deadline. If the debt remains unpaid, the Small Claims Tribunals offer an accessible, affordable route for smaller business claims without a lawyer. Clear terms and good records make enforcement much easier.
Should I put payment terms on the invoice or the contract?
Both. Put your payment terms in the quote or contract so the client agrees to them before the work starts, and repeat them on every invoice with a clear due date. Terms that were agreed in advance are far easier to enforce than terms the client only sees after delivery.