Payment terms are the least examined decision on most invoices. A default gets chosen once — usually Net 30, usually because it is what the software suggested — and then applies to every client for years, regardless of whether it suits the relationship or the cash position.
That default is a financing decision in disguise. Net 30 means you are extending every client a month of interest-free credit, funded out of your own working capital. Sometimes that is exactly right. This guide is about knowing when it is not, and what the alternatives actually cost.
The vocabulary, in full
Most payment terms are shorthand, and the shorthand is worth reading precisely because a one-character difference can move a due date by weeks.
- **Net 7 / 15 / 30 / 60 / 90** — the full amount is due that many days from the invoice date. The number is always calendar days unless stated otherwise.
- **Due on receipt** — payment is expected immediately. In practice it behaves like Net 0 to Net 7, because most payment runs cannot act faster.
- **EOM (end of month)** — the clock starts at the end of the month of issue. "Net 30 EOM" on a 3 March invoice is due 30 April, not 2 April.
- **MFI (month following invoice)** — due on a stated day of the next month. "15 MFI" means the 15th of the month after issue.
- **2/10 Net 30** — deduct 2% if paid within 10 days, otherwise the full amount at 30 days.
- **CIA (cash in advance)** — payment before work starts or goods ship.
- **COD (cash on delivery)** — payment at the point of delivery.
- **50/50 or milestone terms** — a deposit up front with the balance on completion, or staged payments against defined milestones.
What an early-payment discount actually costs
"2/10 Net 30" looks like a small discount. Run the arithmetic and it is one of the most expensive forms of finance a small business routinely offers.
You are giving up 2% of the invoice to be paid 20 days sooner — the difference between day 10 and day 30. As a rate on the 98% you actually receive, that is 2 ÷ 98 = 2.04% for 20 days. There are roughly 18.25 such periods in a year, so the annualised cost is about **37%**.
That number reframes the decision. Offering 2/10 Net 30 is rational if your alternative is borrowing at more than 37%, or if the cash genuinely unblocks something valuable, or if late payment is so endemic that the discount is really buying collection certainty rather than speed. It is not rational as a default courtesy, and it is a poor trade if you are sitting on adequate cash.
The mirror image is worth knowing too: when a supplier offers *you* 2/10 Net 30 and you have the cash, taking it is equivalent to earning about 37% annualised. Discounts are usually a better deal to accept than to offer.
| Terms | Discount | Days saved | Approximate annualised cost |
|---|---|---|---|
| 1/10 Net 30 | 1% | 20 | ~18% |
| 2/10 Net 30 | 2% | 20 | ~37% |
| 2/10 Net 60 | 2% | 50 | ~15% |
| 3/10 Net 30 | 3% | 20 | ~56% |
Choosing terms deliberately
Terms should reflect the risk and the relationship rather than a single house default. A few patterns hold up well in practice.
For a new client with no payment history, shorten the exposure: a deposit, milestone payments, or Net 7 to Net 14 for the first few invoices. This is not distrust, it is proportionate — you have no evidence yet, and the cheapest bad debt is the one you never extended.
For established clients who pay reliably, longer terms are a low-cost concession that buys goodwill. For large organisations, be realistic: many operate fixed payment runs and will pay on their cycle whatever your invoice says, so Net 30 against a monthly run can effectively mean Net 45. Where their standard terms exceed yours, that is a negotiation to have before the first invoice rather than a surprise afterwards.
For long or expensive projects, staged payments matter more than the headline term. A deposit covers your initial costs, milestones keep exposure bounded, and neither depends on the client’s payment behaviour being good.
Making the terms actually operate
Terms only work if they are unambiguous and visible. State them on the invoice in words and give the resulting due date as a date — "Net 30" plus "Due 31 March" removes every counting argument, including the surprisingly common one about whether day one is the invoice date or the day after.
Agree them before the work, not on the invoice. Terms that first appear on a document sent after delivery are terms the client never accepted, and a client with their own procurement rules may simply override them.
Then be consistent. Terms you do not follow up on are not terms, they are suggestions — and clients calibrate to what you enforce rather than what you print. Consistent, unembarrassed follow-up on day 31 does more for your average collection time than any amount of tightening the printed number.
Common Mistakes
Offering early-payment discounts without doing the arithmetic
2/10 Net 30 costs roughly 37% annualised. Offer it when you need the cash faster than you could borrow it, not as a default gesture of goodwill.
Stating terms only on the invoice
Terms belong in the quote or contract, agreed before work starts. Introduced at billing time, they are your assertion rather than an agreement — and a client with standard terms of their own will use theirs.
Writing "Net 30" without a due date
Every ambiguity — invoice date or receipt date, calendar or business days — is an excuse for delay. Print the actual date the money is due.
Using one set of terms for every client
A brand-new client and a five-year client with a perfect record do not warrant the same credit exposure. Terms are a risk instrument; using one setting for everyone wastes it.
Frequently Asked Questions
Does Net 30 mean 30 business days?
No — calendar days, counted from the invoice date unless the invoice states another starting point such as EOM. Day 30 falls where it falls, weekend or not.
What payment terms should a freelancer use?
Net 14 to Net 30 is the common range, with a deposit for larger projects and shorter terms for new clients. If most of your clients are large organisations with fixed payment runs, set terms that acknowledge that reality rather than ones you will spend every month chasing.
Can I change payment terms for an existing client?
Yes, prospectively and with notice. Changing terms mid-engagement or applying new terms to work already agreed generally will not stick. Raise it at a natural boundary — a renewal, a new project, an annual review.
Are shorter payment terms always better?
Not automatically. Terms shorter than a client’s payment cycle can produce invoices that are technically overdue the moment they are processed, which creates friction and noisy ageing reports without accelerating anything. Match terms to how the client actually pays, then enforce them.
Sources & Further Reading
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