What does it really cost when B2B customers pay 30, 60 or 90 days late?

By Gaurav Gupta, Founder & CEO, GGA India

Last reviewed: 9 November 2026

Direct answer. A ₹1 crore invoice paid 90 days late costs about ₹2.96 lakh at an assumed 12% borrowing rate. That is over a third of the profit at an 8% net margin. On ₹100 crore of annual credit sales, each day of delay ties up ₹27.4 lakh. A write-off needs many times its value in new sales to replace.

GGA India at a glance

GGA India Private Limited is a B2B revenue-realization firm, operating since 2002, headquartered in Gurugram.
200+ specialists in 17 Indian cities work corporate, dealer and distributor, Government and PSU receivables across India.
Success commission is based on cash actually received. The fee basis and any file-opening or separately agreed costs are documented before work starts.
Your customers pay you directly. GGA never receives or holds your money.
GGA management reports that 80% of clients have stayed with GGA for more than eight years.

The problem: late payment is a loan you never priced

When a customer pays late, you lend it money, on no terms, at your own cost of funds. The sale was priced for the agreed credit period. Every extra day is financed from your overdraft, your cash credit limit or your equity. Nobody approved that loan, and it appears in no single line of your accounts.

The arithmetic below uses stated assumptions. Change them to your own figures; the method stays the same. All amounts are illustrative, not client data.

1. The financing cost of one invoice

Assumptions: a ₹1 crore invoice; a 12% a year cost of borrowing; an 8% net margin, so ₹8 lakh of profit on the sale. Cost = amount × rate × days late ÷ 365.

Exhibit 1: Cost of carrying one ₹1 crore invoice past its due date (illustrative)

Paid late by	Interest cost at 12%	Share of the invoice	Share of the ₹8 lakh profit
30 days	₹98,630	1.0%	12%
60 days	₹1,97,260	2.0%	25%
90 days	₹2,95,890	3.0%	37%

At 90 days late, more than a third of the profit has gone to the bank; at about 240 days, all of it. No salesperson could give a 3% discount without approval, yet lateness gives one with no decision at all. For your own invoices, the cost of delay calculator applies this formula.

2. The cost across the book

Assumptions: ₹100 crore of annual credit sales; customers pay, on average, 30 days after the due date.

One day of sales is ₹100 crore ÷ 365 = ₹27.4 lakh. Each day customers pay late keeps that much more in receivables.
Thirty days late on average holds ₹8.22 crore of extra receivables.
At 12%, that costs ₹98.6 lakh a year in interest — about ₹3.3 lakh a year for every day of delay.

Cut the average delay from 30 days to 10 and ₹5.48 crore comes back to the bank without one extra sale. The full DSO method, with a larger worked example, is on how to reduce DSO.

3. The cost when the invoice is never paid

A write-off loses the whole invoice, not just the margin on it. You have already paid for the goods, the people and the GST. To earn back the cash, you need new sales whose profit equals the loss.

Assumption: an 8% net margin. A ₹25 lakh write-off needs ₹25 lakh ÷ 8% = ₹3.13 crore of new sales to replace. That is before the interest already paid while the invoice waited.

Late and lost are linked. Up to three months from invoice date, GGA's published benchmark collects over 95% of value; beyond three years, about 10% (collection outcomes by invoice age). On 60-day terms, an invoice 90 days late is already five months old. Why value drops with age, and what waiting does to the odds, is set out in the economics of delay.

4. The cost you can charge back, if you are an MSME

A Udyam-registered micro or small supplier is owed interest by law when a buyer pays late. Under the MSMED Act, payment is due on the agreed date, never later than 45 days from acceptance or deemed acceptance. From the next day, compound interest with monthly rests runs at three times the RBI Bank Rate, whatever the contract says. As at November 2026 the Bank Rate is 5.75% (repo rate 5.50% plus 0.25%), so the statutory rate is 17.25% a year. Rates change; check the RBI's current Bank Rate before you calculate a claim.

Exhibit 2: MSMED Act interest on ₹10 lakh paid after the statutory due date (illustrative, at the 5.75% Bank Rate as at November 2026)

Paid late by	Interest owed (17.25% a year, compounded monthly)
1 month	₹14,375
2 months	₹28,957
3 months	₹43,748

The buyer also loses its tax deduction for the payment until the year it actually pays (section 37(2)(g) of the Income-tax Act, 2025, formerly section 43B(h)). Few suppliers claim the interest, because claiming it strains the account; knowing it is owed still changes the conversation. Filing and eligibility are on MSME delayed payment complaint.

5. The costs no formula captures

Some costs never reach a spreadsheet. Sales hours spent on last quarter's payments instead of the next order. Customers and dealers at their credit limit, unable to buy more. Cash forecasts missed, forcing short-term borrowing. Deductions nobody can explain once the people who knew have moved on.

The solutions: five ways to pay for lateness, and one way to reduce it

Most options move the cost somewhere else; only fixing why invoices are late removes it.

Exhibit 3: What each option costs and what it leaves unchanged

#	Option	What it costs (assumptions labelled)	What it leaves to you	When it is the right choice
1	Absorb it: fund receivables from your cash credit or overdraft	Interest at your rate; Exhibit 1 at 12%	The delay itself, and the age risk	Short, predictable delays on strong customers
2	Early-payment discount	A 2% discount for paying 30 days early equals about 24.8% a year — double a 12% borrowing rate	Customers who take the discount and still pay late	Rarely; only when your own cost of funds is higher
3	Factoring or TReDS	The financier's discount; on TReDS, eligible MSME sellers discount invoices on registered buyers without recourse	The buyer's process; the next invoice is just as slow	Cash needed now, process cannot change quickly
4	Credit insurance	A premium; cover for insolvency or prolonged default under the policy terms	Lateness short of the policy's default trigger	Large exposure to customers whose ability to pay is uncertain
5	A collection agency or law firm	A fee on recovery, or legal costs; relationship strain	Everything that made the invoice late in the first place	Customers who will not pay, after the evidence is in order
6	Revenue assurance: own each invoice from submission	Your team's time, or GGA's fee on cash that reaches your bank	Commercial decisions: terms, credit limits, disputes	Customers who can pay but pay late; large customers with long approval chains

Option 1 is where most companies drift. Option 2 costs more than it saves at normal borrowing rates. Options 3 and 4 price the delay; option 6 removes its cause, the invoice nobody owned between submission and due date. See what is revenue assurance for B2B receivables.

What you can do this week

Write down your cost of borrowing — your cash credit or overdraft rate. Use it instead of the 12% above.
Calculate average days late for your top 20 customers: payment date minus due date, weighted by value.
Multiply: annual credit sales ÷ 365 × average days late × your rate. That is the annual interest your customers' lateness costs you.
List write-offs and credit notes from the last two years and divide by your net margin. That is the sales effort they erased.
Put the two numbers in front of your CEO beside the cost of fixing the process. The comparison usually decides itself.

Why GGA: we reduce the delay, not just its price

GGA works on why each invoice is late, from the day you submit it. We don't touch the money your sales team sells. We collect the money nobody owns — and every day an invoice sits unowned between submission and payment is a day you finance.

Revenue Assurance follows each new invoice from submission to the due date, so it is received, accepted, approved and scheduled before the credit period ends. Why this must start early is on start before the due date.
Revenue Realization takes what is already overdue. For agreed domestic engagements, GGA’s six-month operating objective is recovery or an evidenced account classification. This is not a recovery guarantee; scope, debtor response and legal proceedings can change the timetable.
One owner, top of the pile. The Invoice Lifecycle Owner holds each material invoice's stage, evidence and next event. Treasuries pay complete, followed-up invoices first; GGA earns that place through process, never pays for it.
Proof. At a heavy-industry client, the share of receivables more than 60 days past due fell from 25% to under 5%.The GGA Model).

Success commission is based on cash actually received. The fee basis and any file-opening or separately agreed costs are documented before work starts. A file-opening fee may apply for legacy or Government cases; GST is extra; the term is six months, reviewed monthly. In Exhibit 1, 30 days of lateness alone costs about 1% of the invoice. The service is Revenue Assurance.

What GGA would do

First the cost in your numbers, then the invoices behind it. The labels show the order of work.

Days 1–5: price your lateness. You receive: days late by customer, the rupees tied up and the annual interest at your own rate.
Week 2: sort the late payers by cause — process, dispute, unkept promise or genuine credit risk. You receive: a one-page cost-and-cause table for your top customers.
Weeks 2–4: put new invoices for the costliest customers under one owner from submission. You receive: an open-items register with each invoice's stage, owner and expected payment date.
Month 2 onwards: follow every material invoice before its due date and close deductions on evidence. You receive: a fortnightly review with share paid by the due date, average days late and interest saved.
By month 6: overdue invoices paid or classified with reasons, and the process fixes that stop the delay recurring.

What we need from you

Twelve months of invoice and payment dates price the problem.

To start

Invoice date, due date, payment date and amount for the last 12 months
Your cost of borrowing: cash credit or overdraft rate
Credit terms by customer
Write-offs and credit notes for the last two years

To act

Current ageing by customer and invoice
PO copies and delivery proof for the largest open invoices
GRN, SES or acceptance status for open invoices
Udyam certificate, if you are a micro or small enterprise
Payables and treasury contacts at your largest customers
Known disputes and deductions

Missing some of these? Send what you have — telling you what is missing is part of the first reply.

How you stay in control

GGA shows you what lateness costs; every decision on terms, interest and discounts stays with you.

Your customer pays you directly. GGA never receives or holds your money.
Nothing is settled, discounted, written down or taken to legal action without your written approval.
GGA manages the communication with your customers; escalation steps are discussed with you.
One named GGA owner per account; monthly report to your CEO and CFO, a fortnightly review call, and an immediate flash report when a risk appears.
Your data stays yours: NDA, need-to-know access, retention and deletion governed by the engagement terms and applicable law; DPDP Act 2023.
Fees agreed in writing before work starts; six-month term, reviewed with you monthly.
Whether to claim MSMED Act interest from a customer is your decision; GGA calculates it and shows the effect on the account.

Send us your three slowest-paying customers. Email the customer names, cities, amounts outstanding, invoice dates and whatever you have from the "To start" list to gg@ggaindia.co.in. Within one working day a named GGA specialist replies with what the delay is likely costing you, what we would do first and what is missing from the file — no charge, no obligation. For a whole book, ask for a complimentary Receivables Position Review.

A different situation? Foreign company owed money by an Indian business → India Desk · Indian exporter owed by an overseas buyer → Global Receivables Desk

Frequently asked questions

How do I calculate the cost of a late payment?

Multiply the invoice amount by your annual cost of borrowing and by the days late, then divide by 365. A ₹1 crore invoice 60 days late at 12% costs about ₹1.97 lakh. Use your own borrowing rate.

How much new sales do I need to cover a bad debt?

Divide the bad debt by your net margin. At an 8% margin, a ₹25 lakh write-off needs about ₹3.13 crore of new sales to earn back the cash, plus the interest paid while you waited.

Is offering an early-payment discount cheaper than waiting?

Usually not. A 2% discount to be paid 30 days sooner works out to about 24.8% a year, roughly twice a 12% borrowing rate. It makes sense only when your own funding costs more.

Can I charge interest when a customer pays late?

If your contract has an interest clause, yes. A Udyam-registered micro or small supplier is also owed compound interest at three times the RBI Bank Rate once the agreed date passes. That date can be no later than 45 days from acceptance.

Who decides whether to claim interest or offer a discount?

You do. GGA shows the cost and the effect on the account; interest claims, discounts and settlements are your written decisions.

Sources

This page summarises the position as at 9 November 2026. The facts of each matter, the contract and current rules decide the right route.