# What does a 2/10 net 30 discount really cost?
A 2/10 net 30 discount costs the seller about 37% a year, or 44.6% compounded. The formula, a table of common terms, and when offering it pays.
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A 2/10 net 30 discount costs the seller 2% of the invoice to be paid 20 days sooner, which works out to an annual rate of about 37.2%, or 44.6% once compounding is counted. For the buyer, the same terms are a 37.2% annual return on cash that would otherwise sit idle for 20 days.
That rate is far above what most businesses pay to borrow, and that gap is the whole subject. A discount that looks small on one invoice is one of the most expensive ways to finance your receivables, unless one of a few specific conditions holds. The sections below give the formula, the cost of the common variants, a worked example on a $25,000 invoice, the comparison with a line of credit, and the cases where the discount is still the right call.
All percentages use a 365-day year. Every dollar figure comes from one worked example, with its assumptions stated where it starts.
37.2%simple annual rate the seller pays under 2/10 net 30
44.6%effective annual rate of the same terms, with compounding
$500 vs $120.82discount on a $25,000 invoice against 20 days of borrowing at 9%
Worked example: a $25,000 invoice on 2/10 net 30, a 365-day year, and a line of credit at 9% a year taken as an assumption.
## What does 2/10 net 30 mean?
2/10 net 30 means the buyer may deduct 2% from the invoice if payment arrives within 10 days of the invoice date, and otherwise owes the full amount within 30 days. The first number is the discount percentage, the second is the length of the discount window in days, and "net 30" is the normal due date.
Every early-payment term is read the same way. 1/15 net 45 is 1% off for payment within 15 days, full amount due at 45 days. 3/10 net 30 is 3% off within 10 days, full amount due at 30.
Three points decide what the terms really mean in practice, and they are worth settling before the first invoice goes out:
- **The start of the clock.** The usual starting point is the invoice date, but some buyers count from the date they receive the invoice or the goods. A term written "2/10 net 30 EOM" starts counting at the end of the month of the invoice.
- **The meaning of "paid".** A payment can be counted when it is sent, or when it reaches your account. A bank transfer sent on day 10 may land on day 11 or 12.
- **The base of the discount.** The 2% normally applies to the price of the goods or services. Whether it also applies to freight, expenses passed on at cost, or sales tax is a choice you state on the invoice. How a discount changes the tax due on an invoice varies by country, so check the rule that applies to you.
Accountants call this a cash discount, a prompt-payment discount or a sales discount. It is a different thing from a trade discount or a volume discount, which lower the price whatever the payment date.
## How do you calculate the annual rate hidden in an early-payment discount?
The annual rate of an early-payment discount is the discount divided by the amount actually paid, multiplied by the number of times the acceleration period fits in a year. For 2/10 net 30, that is 2 divided by 98, times 365 divided by 20, or 37.2%.
Two details in that sentence are where most quick calculations go wrong. The rate is 2/98 and not 2/100, because the buyer pays 98 to wipe out a debt of 100: the money in play is 98. And the period is 20 days, not 30: nobody pays before day 10 under these terms, so the discount buys the gap between day 10 and day 30 only.
Written as formulas, with d the discount as a decimal (2% is 0.02), D the discount window in days (10) and N the net due date in days (30):
- **Simple annual rate** = d ÷ (1 − d) × 365 ÷ (N − D)
- **Effective annual rate** = (1 + d ÷ (1 − d)) raised to the power 365 ÷ (N − D), minus 1
The steps below apply both formulas to 2/10 net 30.
The annual rate of 2/10 net 30, step by stepDiscount 2%, discount window 10 days, due date 30 days, 365-day year
Find the rate for one periodDivide the discount by what is left after it: 2 / 98 = 2.04%. Giving up $2 to collect $98 early is a 2.04% charge on the money received.
Count the days the discount buysSubtract the discount window from the due date: 30 - 10 = 20 days.
Count the periods in a yearDivide 365 by the days bought: 365 / 20 = 18.25 periods.
Annualise without compoundingMultiply the period rate by the number of periods: 2.04% x 18.25 = 37.2%. This is the simple annual rate, the one to compare with a quoted loan rate.
Annualise with compoundingRaise 1.0204 to the power 18.25 and subtract 1: 44.6%. This is the effective annual rate, the one to compare with an effective or compounded rate.
The simple rate is the right yardstick against a line of credit quoted as an annual rate with interest charged on the days used. The effective rate assumes the 2.04% is paid again and again on a growing balance through the year, which is how a compounded rate is stated. Use the same kind of rate on both sides of any comparison.
Many finance textbooks use a 360-day year, which gives 36.7% for the same terms instead of 37.2%. The gap is small and never changes the decision; what matters is using one convention throughout.
## What do the common discount terms cost per year?
Common early-payment terms cost the seller between about 7% and 56% a year, and the days bought matter as much as the percentage. The table applies the two formulas to a range of terms a seller might print on an invoice.
| Terms | Days bought | Simple annual rate | Effective annual rate |
| --- | --- | --- | --- |
| 1/10 net 60 | 50 | 7.4% | 7.6% |
| 1/15 net 45 | 30 | 12.3% | 13.0% |
| 2/10 net 60 | 50 | 14.9% | 15.9% |
| 1/10 net 30 | 20 | 18.4% | 20.1% |
| 2/10 net 45 | 35 | 21.3% | 23.5% |
| 2/15 net 45 | 30 | 24.8% | 27.9% |
| 2/10 net 30 | 20 | 37.2% | 44.6% |
| 3/10 net 30 | 20 | 56.4% | 74.3% |
Two patterns stand out. Halving the discount roughly halves the rate, so 1/10 net 30 costs about half of 2/10 net 30. And lengthening the gap between the discount date and the due date cuts the rate sharply: the same 2% costs 37.2% a year when it buys 20 days and 14.9% when it buys 50. A discount is cheap for the seller only when it buys a lot of days.
The effective rate pulls further away from the simple rate as the terms get more expensive. At 1/10 net 60 the two are almost identical; at 3/10 net 30 they are 18 points apart, because a 3.09% charge repeated 18.25 times a year compounds quickly.
## What does 2/10 net 30 cost on a $25,000 invoice?
On a $25,000 invoice, 2/10 net 30 costs the seller $500: the buyer pays $24,500 by day 10 instead of $25,000 by day 30. The $500 is the price of holding $24,500 for 20 extra days.
Here is the worked example used in the rest of the article. You invoice a client $25,000 on 2/10 net 30. The client pays on day 10 and deducts 2% of $25,000, which is $500. You receive $24,500, and you receive it 20 days before the due date.
The $500 does not come out of revenue in the abstract; it comes out of profit. Assume a net margin of 15% on the job, which is an assumption for the example and not a benchmark. Your profit on $25,000 would be $3,750. The discount removes $500 of it, or 13.3% of the profit on that invoice, for 20 days of earlier cash. To earn the $500 back at the same margin, you would need about $3,333 of additional sales.
The annual picture follows the same arithmetic. Assume you invoice $600,000 a year on terms and that clients take the discount on 60% of it, again as assumptions. The discount then applies to $360,000 and costs 2% of that, or $7,200 a year. In exchange, an average of about $19,332 leaves your receivables and sits in your bank account instead: $352,800 collected 20 days sooner, spread over 365 days. Paying $7,200 a year to free $19,332 is the 37.2% rate again, seen from the other end.
In the books, the discount is normally recorded as a sales discount that reduces revenue, not as an interest expense. That is why it rarely shows up when an owner reviews the cost of financing: it is real money spent on financing that is filed under sales.
## Is the discount cheaper than borrowing on your own line of credit?
A 2/10 net 30 discount is cheaper than a line of credit only if the line costs more than 37.2% a year, which is rare for a business that has one. At an assumed rate of 9% a year, borrowing the same cash for the same 20 days costs $120.82 against $500 for the discount.
The 9% is an assumption chosen for the example. Replace it with the rate on your own facility; the method does not change. Interest for 20 days on $24,500 at 9% a year is $24,500 x 0.09 x 20 / 365 = $120.82. The discount costs $500. Offering the discount instead of drawing on the line costs you $379.18 more on this one invoice, and you end up with the same cash on the same day.
The comparison can be turned around to find the discount that would match your borrowing cost. A discount that buys 20 days costs the same as a 9% line when it is about 0.49% of the invoice, or $122.68 on $25,000. Any discount above that level is more expensive than the line; 2% is roughly four times that level.
The general rule: compute the simple annual rate of the terms you are considering, and put it next to the annual rate of the cheapest financing you can actually use. If the discount rate is higher, the discount is the more expensive source of cash. The comparison assumes you have a line with room on it. A business with no borrowing capacity, or one whose only alternative is a much costlier form of finance, is in a different position, covered further down.
One more cost belongs on the borrowing side of the scale. A line of credit can carry arrangement or renewal fees, and a fee on the unused portion. Spread over the amounts you really draw, those fees raise the true rate of the line. They rarely lift it anywhere near 37%, but they belong in the number you compare.
## What if the client would have paid late anyway?
When a client would have paid late without the discount, the discount buys more days than the invoice says, and its real annual rate falls. A 2% discount that moves a payment from day 75 to day 10 buys 65 days, not 20, and costs 11.5% a year instead of 37.2%.
The formula in the table assumes the alternative to day 10 is day 30. If your client's habit is to pay net-30 invoices on day 45 or day 60, the honest comparison is between day 10 and the day the money would really have arrived. Replace N in the formula with that day.
What a 2% discount for payment by day 10 really costsSimple annual rate, by the day the client would have paid without the discount, 365-day year
Client would pay on timeClient would pay late
Rate = 2 / 98 x 365 / (day of payment without the discount - 10). The cost of chasing a late invoice and the risk of not being paid at all are not included.
Against the assumed 9% line of credit, the discount on the $25,000 invoice breaks even when it buys about 83 days, which means a client who would otherwise have paid around day 93. Below that, borrowing is cheaper; beyond it, the discount is.
That calculation only works if you are honest about two things. First, the discount goes to everyone who takes it, including the clients who already paid on day 30. Offering 2% across the board to pull in two slow payers means paying 37.2% a year on every punctual client's invoice. Second, the slowest payers are often the least likely to respond: a client who pays on day 90 because cash is short cannot pay on day 10 at any discount. The clients most likely to take the offer are the ones with cash on hand, who would have paid on time anyway.
## What happens when the buyer takes the discount but pays late?
A buyer who deducts the discount after the window has closed has taken an unearned discount: the seller gives up the 2% and gets little or no acceleration in return. On the $25,000 invoice, a client who pays $24,500 on day 30 has kept $500 and bought the seller nothing.
The halfway cases are almost as bad. A client who pays $24,500 on day 20 gives you the cash 10 days early instead of 20, which doubles the annual rate you are paying to 74.5%. Each day of slippage past the window makes the same $500 buy less.
Unearned discounts happen because they are easy to take and awkward to refuse. The payment arrives, it is short by a small amount, and chasing $500 feels out of proportion with a $25,000 relationship. Buyers' payment runs are also scheduled: an invoice approved on day 9 may only be paid in the weekly run on day 14, with the discount still applied by the system.
Whichever response you choose, the invoice must make it enforceable. That means a discount deadline written as a calendar date, a clear statement of when a payment counts as made, and a line saying the full amount stays due if the deadline is missed. A short payment is then an underpayment with a balance outstanding, not a matter of interpretation.
Tolerating unearned discounts has a lasting effect: the discounted price becomes the price. Once a client has deducted 2% on day 30 three times without comment, the terms are in effect "2% off, net 30", and reversing that is a renegotiation.
## Should the buyer take a 2/10 net 30 discount?
A buyer should take a 2/10 net 30 discount whenever the cash is available or can be borrowed at less than 37.2% a year, which covers most ordinary sources of funds. Paying $24,500 on day 10 instead of $25,000 on day 30 is a $500 gain for giving up 20 days of use of the money.
The table shows what those 20 days cost the buyer under three funding assumptions, and what is left of the $500. The rates are assumptions for the example.
| Where the buyer finds the $24,500 | Assumed annual rate | Cost of 20 days | Net gain from the discount |
| --- | --- | --- | --- |
| Cash on deposit | 4% | $53.70 | $446.30 |
| Line of credit | 9% | $120.82 | $379.18 |
| High-cost short-term credit | 24% | $322.19 | $177.81 |
The gain disappears only when the buyer's cost of funds passes 37.2% a year, or when the buyer simply cannot find the cash on day 10. This is why well-funded buyers take every discount on offer and often ask for one where none is printed: for a finance team, paying early at these terms is among the best low-risk returns available on short-term cash.
For a buyer, the practical obstacle is rarely the rate. It is the approval process. An invoice that needs three sign-offs will not be paid in 10 days, and the discount is lost for reasons that have nothing to do with finance. Buyers who want the discount route discounted invoices through a faster approval path and pay them outside the normal payment run.
Sellers should read the same table from the other side. Every dollar in the last column is a dollar transferred from your margin to your client. When a client asks for 2/10 net 30, the request is for a 2% price cut that the client can fund at a cost of a few tenths of a percent.
## When does offering an early-payment discount make sense?
Offering an early-payment discount makes sense when the cash is worth more to you than the rate you are paying for it, and that happens in a limited number of situations. In each of them, the 37.2% is being compared with something more expensive, not with a 9% line.
- **You have no cheaper financing.** With no line of credit, or one that is fully drawn, the alternative may be a missed payroll, a late payment to your own supplier, or a form of finance that costs more than the discount. Compute that alternative's annual rate before deciding.
- **Early cash earns more than it costs.** If cash on day 10 lets you take your own supplier's discount, accept a profitable order you would otherwise turn down, or avoid penalties, the return can exceed the cost. The comparison must be made in numbers, not assumed.
- **The client would truly pay far later.** As the chart above shows, a discount that moves a payment from day 90 or beyond costs about the same as moderate borrowing. This holds only if the client is able to pay early and the discount is offered to that client alone.
- **You are worried about being paid at all.** Money received on day 10 cannot become a bad debt on day 90. With a client whose finances look fragile, part of the 2% is a premium for shortening your exposure. A deposit or payment in stages addresses the same risk more directly.
- **The price already includes it.** Some sellers set prices knowing most clients will take the discount, so the discounted amount is the intended price and the full amount is in effect a surcharge for paying slowly. This works when it is deliberate and the margin has been calculated on the discounted figure.
Outside those cases, the discount is an expensive habit. The usual sign is a seller who offers it to every client by default, has an unused line of credit, and has never added up the year's deductions.
A selective approach limits the cost. Offer the discount by client and not as a printed standard term, choose a smaller percentage, and review once a year who took it and how many days it really bought. A 1% discount that buys 50 days costs 7.4% a year, a fifth of the standard formula.
## How should you word the discount on an invoice?
An invoice should state the discount as two amounts with two calendar dates, plus the rule for when a payment counts as received. "2/10 net 30" alone leaves the buyer to work out the dates and the figures, and every calculation left to the buyer is a possible dispute.
Taking the $25,000 example with an invoice dated 3 March, the terms block could read:
- Payment terms: 2/10, net 30.
- Pay $24,500.00 if payment is received in our account on or before 13 March.
- Pay $25,000.00 if payment is received after 13 March. Full payment is due by 2 April.
- The 2% discount applies to the invoice total before tax. It does not apply to payments received after 13 March, and any amount deducted after that date remains due.
Five elements make that wording work:
1. **Both amounts in dollars.** The buyer's accounts team does not need to compute 2%, and cannot compute it on the wrong base.
2. **Both deadlines as dates.** "Within 10 days" invites an argument about day zero; "on or before 13 March" does not.
3. **The definition of paid.** "Received in our account" places the risk of a slow transfer on the payer. If you prefer to count from the date the payment is sent, say that instead.
4. **The base.** State whether tax, freight and expenses passed on are inside or outside the discount.
5. **The consequence of missing the window.** One sentence saying the deducted amount remains due turns an unearned discount into a plain balance owed.
The same terms belong in the contract or the order confirmation, not only on the invoice. A discount that appears for the first time on the invoice is an offer the client may accept; a discount written into the agreement is a term both sides have already accepted, including its conditions. If you charge interest or a fee on late payments, keep it in the same block so the client sees the full range: less for early, more for late. Limits on late-payment charges vary by country and state.
## What are the alternatives to a discount for getting paid faster?
The alternatives to an early-payment discount are shorter terms, payment in stages, late-payment charges, faster payment methods, a sliding discount, and outside financing such as a line of credit or the sale of the invoice. Each one shortens the wait or covers it, at a different cost.
| Option | What it costs the seller | What it changes | Where it stops |
| --- | --- | --- | --- |
| Shorter terms (net 15, due on receipt) | Nothing directly | The due date itself | The client must agree; large buyers often impose their own terms |
| Deposit or staged billing | Nothing directly | Part of the money arrives before or during the work | Needs agreement up front; less usual for goods delivered at once |
| Late-payment interest or fee | Nothing; may bring in a little | Gives the client a reason not to drift past the due date | Does not bring payment forward; limits vary by jurisdiction |
| Faster payment methods | A processing fee on some methods | Removes days lost to cheques and slow transfers | The client still chooses when to pay |
| Sliding discount | Less than a fixed discount on later payments | The discount shrinks each day, so it never ends abruptly on day 11 | More complex to state and to check |
| Line of credit | Interest on the days drawn, plus any fees | Covers the wait without touching the price | Needs approval and capacity; it is debt |
| Selling or financing the invoice | A fee that depends on the provider and the client's credit | Cash within days of invoicing | The fee can rival a discount; the client may be notified |
| Buyer-led early payment programme | A financing charge based on the buyer's credit | Early payment through the buyer's own funder | Exists only where a large buyer has set one up |
The first three rows cost nothing and should be tried before any option that carries a price. Shortening terms from net 30 to net 15 gains 15 days with no discount at all, and a deposit of part of the fee before work starts brings in cash earlier than any discount could.
A separate source of delay sits after the client has paid. Where one client payment has to be shared between several parties, such as a lead firm and its subcontractors or a consultant and a referrer, the money often waits again while the first recipient passes each share on. A payment router such as Shaka addresses that stage only: each party's share is agreed before the client pays, the client pays once, and every party receives its share at the same moment in a payment that is final. It does not change when the client decides to pay, so it sits alongside the options in the table and does not replace them.
Whatever combination you choose, price it the same way you priced the discount: dollars given up, divided by dollars received, scaled to a year by the days gained. An option whose annual rate you cannot state is one you have not yet compared.