"Net 30" means the invoice is due 30 calendar days after the invoice date. Not 30 business days, not 30 days after the client opens the email, and not "sometime next month." An invoice dated Friday, October 2, 2026 on Net 30 terms is due on Sunday, November 1, 2026.
That is the whole definition, and it is where most of the trouble starts. The term is short enough to fit in a box on any invoice, which is why it became the default, and vague enough in practice — weekends, "from receipt," "end of month" — that two businesses can read the same invoice and expect payment a week apart.
This guide goes one level deeper than the basics in how to create an invoice: the exact due-date arithmetic, what waiting 30 or 60 days actually costs a small business in dollars, why "2/10 net 30" is a far bigger number than it looks, and what late fees the law lets you charge.
DefinitionsNet 30, Net 15, Net 60 and the rest
Every "Net" term counts calendar days from the invoice date. The variations only change the number or the starting point.
- Due on receipt — payable as soon as the client receives it. Common for small jobs, new clients and consumer work.
- Net 7 / Net 15 — due 7 or 15 days after the invoice date. Normal for freelancers and short projects.
- Net 30 — due 30 days after the invoice date. The default business-to-business term in the US and UK.
- Net 45 / Net 60 / Net 90 — longer terms, usually requested by large companies and retailers with monthly payment runs.
- Net 30 EOM — due 30 days after the end of the month the invoice is dated in, not after the invoice date itself.
- 2/10 net 30 — the client may take a 2% discount if they pay within 10 days; otherwise the full amount is due on day 30.
- CIA / CWO / COD — cash in advance, cash with order, cash on delivery. Payment before or at the handover, no credit at all.
Here is what those terms produce for one real invoice date:
Net 7
- Due date
- Fri, Oct 9, 2026
- Watch out for
- —
Net 15
- Due date
- Sat, Oct 17, 2026
- Watch out for
- Falls on a weekend
2/10 net 30 (discount)
- Due date
- Mon, Oct 12, 2026
- Watch out for
- Last day for the 2% discount
Net 30
- Due date
- Sun, Nov 1, 2026
- Watch out for
- Falls on a weekend
Net 30 EOM
- Due date
- Mon, Nov 30, 2026
- Watch out for
- 29 days later than plain Net 30
Net 60
- Due date
- Tue, Dec 1, 2026
- Watch out for
- —
Net 90
- Due date
- Thu, Dec 31, 2026
- Watch out for
- Year-end payment freezes
| Term on the invoice | Due date | Watch out for |
|---|---|---|
| Net 7 | Fri, Oct 9, 2026 | — |
| Net 15 | Sat, Oct 17, 2026 | Falls on a weekend |
| 2/10 net 30 (discount) | Mon, Oct 12, 2026 | Last day for the 2% discount |
| Net 30 | Sun, Nov 1, 2026 | Falls on a weekend |
| Net 30 EOM | Mon, Nov 30, 2026 | 29 days later than plain Net 30 |
| Net 60 | Tue, Dec 1, 2026 | — |
| Net 90 | Thu, Dec 31, 2026 | Year-end payment freezes |
Source: CalculatorAI · calculatorai.app · CalculatorAI date arithmetic
Two of the seven land on a weekend. Neither "Net" nor any general law tells you whether a Sunday due date means the Friday before or the Monday after — that is set by your contract or simply by what the client's accounts-payable system does. The way out is to stop leaving it to interpretation.
On the invoiceHow to write the terms so nobody has to count
The term alone makes the payer do arithmetic, and arithmetic is where "I thought it was due next week" comes from. Write the term and the date it produces:
Put the invoice date at the top
Every Net term counts from it. Date the invoice the day you send it, not the day the work started — back-dating a Net 30 invoice quietly shortens your client's terms and invites a dispute.
State the term in words the payer recognises
Payment terms: Net 30. If you offer a discount, spell it out: 2% discount if paid by October 12, 2026; otherwise the full amount is due by November 1, 2026.
Write the absolute due date
Due date: November 1, 2026. If that falls on a weekend and you want Friday instead, choose Friday and print Friday. The date on the invoice beats the term in every argument.
Add the late-payment line, if you charge one
Example: Balances unpaid after the due date accrue interest at 1.5% per month. A fee that was never on the invoice or in the contract is very hard to collect.
Match the client's process
Large companies pay against a purchase-order number and on fixed payment runs. Ask for the PO and the payment-run schedule before invoicing; a correct invoice that misses the run waits another cycle.
In the free Invoice Generator, Payment terms is a text field and Due date is a separate date field, and the PDF prints both. That separation is deliberate: you can type "Net 30" or "2/10 net 30" exactly as agreed and still give the client one unambiguous date. Once a sent invoice is in the Invoices Tracker, its due date is what moves it to overdue on the tracker's calendar.
The real costWhat waiting 30 days costs you
Offering terms means you are lending your client money interest-free until the due date. For a small business that is not an abstraction: the gap is covered by your cash balance, a credit line or a credit card, and each has a price.
Since the September 2026 Federal Reserve hike the US prime rate is 7.00% (what that hike did to borrowing costs). A small-business line of credit at prime plus three points is about 10%; carrying the gap on a business credit card is closer to 24%. Here is what an unpaid invoice costs at each rate:
$10,000 · 15 days
- At 10% (credit line)
- $41.10
- At 24% (card)
- $98.63
$10,000 · 30 days
- At 10% (credit line)
- $82.19
- At 24% (card)
- $197.26
$10,000 · 60 days
- At 10% (credit line)
- $164.38
- At 24% (card)
- $394.52
$50,000 · 30 days
- At 10% (credit line)
- $410.96
- At 24% (card)
- $986.30
$50,000 · 60 days
- At 10% (credit line)
- $821.92
- At 24% (card)
- $1,972.60
| Invoice and wait | At 10% (credit line) | At 24% (card) |
|---|---|---|
| $10,000 · 15 days | $41.10 | $98.63 |
| $10,000 · 30 days | $82.19 | $197.26 |
| $10,000 · 60 days | $164.38 | $394.52 |
| $50,000 · 30 days | $410.96 | $986.30 |
| $50,000 · 60 days | $821.92 | $1,972.60 |
Source: CalculatorAI · calculatorai.app · CalculatorAI arithmetic; 10% ≈ prime (7.00%) + 3 points, 24% ≈ business card APR
Moving one $50,000 client from Net 30 to Net 60 costs about $411 more on a credit line and nearly $1,000 more on a card — per invoice. That is the number to bring to a procurement team that "requires" Net 60: either it is built into the price, or it comes out of your margin.
The second cost is less visible. On a steady stream of work, the money you have permanently lent out is roughly annual revenue × days to payment ÷ 365:
Net 15 vs Net 60 is a $14,795 difference in cash
A consultant bills $10,000 a month. If clients pay on day 15, about $4,932 is outstanding at any time. On Net 30 it is $9,863; if they drift to day 45 it is $14,795; on Net 60 it is $19,726. That balance is not lost, but it is cash you cannot use for tax payments, equipment or a slow month — and it grows every time a client pays late.
That balance matters most around tax deadlines. A self-employed person pays quarterly estimated taxes on income they have earned, whether or not the client has paid yet — and a cash-basis business is taxed when the money arrives, which can push a December invoice paid in February into the next year.
2/10 net 30The discount is a 37% loan — to your client
"2/10 net 30" looks like a modest courtesy. Run it the other way: a client who skips the discount keeps your money for 20 more days (day 10 to day 30) and pays 2% for the privilege. As an annual rate, that is expensive borrowing.
Discount ÷ (1 − Discount) × 365 ÷ (Net days − Discount days)2 ÷ 98 × 365 ÷ 20 = 37.24% a year (44.59% compounded)1 ÷ 99 × 365 ÷ 20 = 18.43% a year2 ÷ 98 × 365 ÷ 50 = 14.90% a yearThat is why finance departments with cash take 2/10 net 30 almost every time: no savings account pays 37%. It is also why the discount is expensive for you. On a $10,000 invoice the 2% is $200. Borrowing the same $9,800 for those 20 days costs $53.70 on a 10% credit line, or $128.88 even on a 24% card.
When you can borrow or wait
If a credit line or your own cash covers the gap, the discount costs several times what the money is worth. On $10,000, you give up $200 to save $54 of interest at 10%.
When speed or risk is the real problem
A client whose payment is uncertain, a cash crunch with no cheaper credit, or a buyer who only pays early when there is a discount line — in those cases 2% can buy certainty worth more than the arithmetic.
If you do offer it, price it in — a 2% discount is a 2% price cut for every client who takes it — and print the discount deadline as a date, not as "10 days."
Late feesWhat you can charge, and where it is set
Terms only have teeth if lateness costs something, and the rules depend on where you and the client are.
United States. There is no single federal late-fee rule for private invoices. What you can charge comes from the contract plus state law — interest caps (usury limits) and, for consumers, extra protections. Common practice is 1% to 1.5% per month on the overdue balance; 1.5% a month is 18% a year, or $75 for one month on a $5,000 invoice. The fee must be agreed before the work, typically in the contract and repeated on the invoice. If the client is a federal agency, the Prompt Payment Act generally requires payment within 30 days and adds interest automatically when the government pays late.
United Kingdom. For business-to-business invoices the Late Payment of Commercial Debts (Interest) Act lets you claim statutory interest at 8% plus the Bank of England base rate — with base rate at 3.75%, that is 11.75% a year — plus a fixed recovery sum per invoice: £40 under £1,000, £70 from £1,000 to £9,999.99, and £100 from £10,000. You can claim it even if your invoice did not mention it, though stating it makes payment more likely. It does not apply to sales to consumers.
£800 · 30 days late
- Interest
- £7.73
- Fixed sum
- £40
- You can claim
- £47.73
£5,000 · 30 days late
- Interest
- £48.29
- Fixed sum
- £70
- You can claim
- £118.29
£20,000 · 60 days late
- Interest
- £386.30
- Fixed sum
- £100
- You can claim
- £486.30
| Invoice and delay | Interest | Fixed sum | You can claim |
|---|---|---|---|
| £800 · 30 days late | £7.73 | £40 | £47.73 |
| £5,000 · 30 days late | £48.29 | £70 | £118.29 |
| £20,000 · 60 days late | £386.30 | £100 | £486.30 |
Source: CalculatorAI · calculatorai.app · GOV.UK late commercial payments guidance; CalculatorAI arithmetic
European Union. The Late Payment Directive sets a similar floor for business invoices — the central-bank reference rate plus at least eight percentage points, and a minimum €40 compensation — implemented in each country's own law.
In practice most late payments are administrative — a missing PO number, an invoice in the wrong inbox, a missed payment run — not a refusal. A polite reminder the day after the due date, a second at day 7 and a firmer note at day 14 recover most of them before any fee is mentioned — the follow-up routine in how to invoice a client as a freelancer works for any business. If speed matters more than fees, the 2026 PayPal invoice fee comparison shows what a pay-now button costs against waiting for a bank transfer.
Choosing a termWhich one to put on your next invoice
New client or small job
Due on receipt or Net 7, or a deposit up front. You have no payment history yet, and the amount does not justify financing it.
Freelancer, regular client
Net 15 is normal and halves the cash you carry compared with Net 30. Most clients will not object if it is stated at the start.
Business client with an AP department
Net 30 is the expected default. Ask for the PO number and the payment-run dates so the invoice actually makes the run.
Large company demanding Net 60 or 90
Price the wait in: at 10%, Net 60 on $50,000 costs about $822 in financing. Ask for milestone invoices or a deposit instead of one large bill.
Cash is tight this month
Shorten terms on new work rather than offering 2/10 net 30 — the discount is the most expensive money you can raise.
Payment through a hosted checkout
Card and PayPal payments arrive faster but carry a processing fee; compare that fee with the cost of waiting for a free bank transfer.
Where these numbers come from
- Due dates are calendar days added to an invoice date of Friday, October 2, 2026. "Net 30 EOM" counts 30 days from October 31.
- Carrying cost is simple interest: amount × annual rate × days ÷ 365. The 10% rate assumes a credit line at the 7.00% prime rate plus three points; 24% approximates a business credit card. Your own rate may be lower (cash with no borrowing has only an opportunity cost) or much higher (online lenders and factoring often charge more), so the table is a middle case.
- Average outstanding balance assumes evenly spread billing: revenue × days to payment ÷ 365.
- Discount rates use the standard cost-of-trade-credit formula. The simple rate ignores compounding and understates the true cost; the compounded figure assumes the decision repeats every cycle.
- UK figures use GOV.UK's statutory interest formula (8% plus base rate), base rate 3.75% (held by the Bank of England in September 2026) and the fixed sums of £40, £70 and £100. The statute uses the base rate in force on 30 June or 31 December for each following six months; check it before claiming.
- US late fees of 1–1.5% per month are common practice, not a legal maximum; state law sets the limits.
The arithmetic is reproducible in a short script; all dollar figures are rounded to the cent.
FAQFrequently asked questions
What does Net 30 mean on an invoice?
It means the full amount is due 30 calendar days after the invoice date. An invoice dated October 2, 2026 on Net 30 terms is due November 1, 2026.
Does Net 30 include weekends and holidays?
Yes. Net terms count calendar days, not business days. If the due date lands on a weekend or holiday, your contract decides whether payment moves earlier or later — so print the exact date you expect on the invoice.
Does Net 30 start from the invoice date or the delivery date?
From the invoice date, unless the terms say otherwise ("Net 30 from receipt," "Net 30 from approval," "Net 30 EOM"). Write the starting point and the due date on the invoice to avoid a dispute.
What does 2/10 net 30 mean?
The client can deduct 2% if they pay within 10 days of the invoice date; otherwise the full amount is due in 30 days. Skipping that discount is equivalent to borrowing at about 37% a year, which is why most buyers with cash take it.
What is the difference between Net 30 and Net 30 EOM?
Net 30 counts from the invoice date. Net 30 EOM counts 30 days from the end of the month in which the invoice is dated, so an October 2 invoice is due November 30 instead of November 1.
Is Net 15 or Net 30 better for a freelancer?
Net 15 halves the money you have waiting for payment and is common for freelance work. Net 30 is normal when the client is a larger business with a monthly payment run.
Can I charge a late fee on a Net 30 invoice?
Usually, if it was agreed in advance and is within local law. In the US the limits come from your contract and state law; 1–1.5% per month is common. UK businesses can claim statutory interest of 8% plus base rate and a £40–£100 fixed sum from other businesses.
What happens if a client misses the Net 30 due date?
The invoice is overdue. Send a reminder that quotes the invoice number, amount and due date, follow up on a fixed schedule, and apply any agreed late fee. Most overdue invoices are paid after the first or second reminder.
Put a date on it
Net 30 is a good default precisely because everyone recognises it. The term is not the problem; the ambiguity around it is. Date the invoice the day you send it, print the due date next to the term, decide in advance whether a discount or late fee is worth it, and know what each extra 30 days of waiting costs you — about $82 per $10,000 on a 10% line of credit.
Create the invoice with both fields filled in the Invoice Generator, then let the Invoices Tracker show you which ones are due, which are overdue and how much cash is still out with clients.
