Payment Reminder Templates for Indian Businesses

If a client has not paid your invoice, the fix is usually a sequence of short, clear reminders that get firmer on a fixed schedule, not one angry message. This guide gives you ready-to-copy WhatsApp and email templates for every stage, from a friendly heads-up before the due date to a final notice. It also covers the MSME 45-day payment rule and the government’s online route for delayed-payment complaints if you are a registered micro or small supplier.

Why most payment reminders fail

Most overdue invoices in small Indian businesses are not cases of a client refusing to pay. They are cases of nobody on the client’s side owning the payment. The invoice sits in someone’s WhatsApp, the accounts team never saw it, the purchase order number is missing, or the person who approved it is on leave. A reminder that just says “Sir, payment pending, please check” does nothing to fix any of these.

Good reminders work because they remove friction. They tell the reader exactly what is owed, for what, since when, and how to pay right now. They also escalate on a predictable schedule, so the client learns that your follow-ups do not go away.

Three habits cause most of the delay:

• Vague messages. No invoice number, no amount, no due date. The client has to dig, so they postpone.
• Irregular follow-ups. One reminder, then silence for a month, then an angry call. The client learns that waiting works.
• Wrong person. You keep messaging the marketing head who hired you, while the cheque is signed by accounts.

Fix those three and you will recover most dues without ever mentioning the law.

Before you send anything: get the invoice right

A reminder is only as strong as the invoice behind it. Before you chase, check that your invoice has:

• Invoice number and date, plus the client’s PO or work order number if they issued one
• Your GSTIN and the client’s GSTIN for B2B supplies, with tax shown correctly (you can double-check the split on our GST calculator)
• A clear due date written as a date (“Due: 15 November 2026”), not “30 days”
• Bank details, a UPI ID or QR code, and a payment link if you use one
• Your Udyam Registration Number, if you are a registered micro or small enterprise
• The name and email of the person in accounts who should process it

The Udyam number matters. Many larger buyers track MSME vendors separately because of their own legal and tax obligations, so printing it on the invoice quietly moves you up the queue.

The reminder ladder: when to send what

Here is a schedule that works for most B2B service and supply businesses. Adjust the days to your credit terms, but keep the shape.

Stage	When	Channel	Tone
1. Pre-due nudge	3 days before due date	Email (copy on WhatsApp)	Friendly, helpful
2. Due-date reminder	On the due date	WhatsApp	Polite, factual
3. First overdue	7 days overdue	Email + WhatsApp	Polite but direct
4. Second overdue	15 days overdue	Email to contact and accounts, plus a call	Firm
5. Final notice	30 days overdue	Email to decision-maker, written letter if needed	Formal, consequences stated
6. Formal action	After final notice deadline	Legal notice or MSME delayed-payment case	Legal

Two rules for the whole ladder. First, every message stands alone: someone reading only stage 4 should know everything. Second, never skip a stage to vent. A jump from polite to threatening damages the relationship and rarely speeds payment.

WhatsApp payment reminder templates

WhatsApp works for small, quick nudges. Keep messages short, put the amount in the first line, and attach the invoice PDF every time, even if you sent it before. Replace the brackets with your details.

Stage 1: pre-due nudge

Hi [Name], a quick note that invoice [INV-245] for Rs [48,000] is due on [15 Nov]. Attaching it again for easy reference. UPI: [yourbusiness@bank]. Let me know if accounts needs anything else from us. Thank you!

Stage 2: on the due date

Good morning [Name]. Invoice [INV-245] for Rs [48,000] is due today. Payment link / UPI: [details]. Could you confirm once it is processed? Thanks.

Stage 3: 7 days overdue

Hi [Name], invoice [INV-245] for Rs [48,000] was due on [15 Nov] and is now 7 days overdue. Could you share the expected payment date? If it is stuck with accounts, please share the right contact and I will follow up directly.

Stage 4: 15 days overdue

[Name], invoice [INV-245] (Rs [48,000], due [15 Nov]) is now 15 days overdue and we have not received a payment date. Please arrange payment by [date, 5 days out]. I have also emailed [accounts contact]. Calling you tomorrow at 11 am to close this.

Do not send stage 5 on WhatsApp alone. A final notice should be on email or letter so that you have a clean record.

Email payment reminder templates

Email gives you a paper trail, reaches the accounts team, and is what you will show later if you file a complaint. Use a subject line that a busy accountant can search for.

Stage 1: friendly reminder before due date

Subject: Invoice INV-245 for Rs 48,000 due 15 November

Dear [Name],

This is a friendly reminder that invoice INV-245 dated [date] for Rs 48,000 (including GST) is due on 15 November 2026. A copy is attached.

Bank: [name, account no., IFSC] | UPI: [ID] | Payment link: [link]

If you need a PO reference or any other detail to process this, just reply and we will send it the same day.

Regards,

[Your name], [Business], Udyam No. [UDYAM-XX-00-0000000]

Stage 3: first overdue reminder

Subject: Overdue: Invoice INV-245, Rs 48,000 (due 15 Nov)

Dear [Name],

Our records show invoice INV-245 for Rs 48,000, due on 15 November 2026, is still unpaid. We would be grateful if you could share the expected payment date, or let us know if anything on the invoice needs correcting.

I have copied [accounts contact] so that it reaches the right desk. Invoice attached again.

Thanks and regards,

[Name]

Stage 4: firm reminder with interest note

Subject: Second reminder: INV-245 now 15 days overdue

Dear [Name],

Invoice INV-245 for Rs 48,000 remains unpaid 15 days after its due date of 15 November 2026, and we have not received a payment date despite our reminders of [dates].

We request payment by [date]. As a Udyam-registered micro enterprise, we would also note that under Section 16 of the MSMED Act, 2006, delayed payments to micro and small suppliers carry compound interest at three times the bank rate notified by the RBI. We would much rather settle this simply, so please let us know if there is a problem we can help solve.

Regards,

[Name]

Stage 5: final notice before action

Subject: Final notice: INV-245 (Rs 48,000), payment required by [date]

Dear [Decision-maker name],

Despite reminders on [dates], invoice INV-245 for Rs 48,000, due 15 November 2026, remains unpaid. This is our final request for payment of the principal by [date, 7 days out].

If payment is not received by then, we will proceed with a delayed-payment application before the Micro and Small Enterprises Facilitation Council under the MSMED Act, 2006, including the statutory interest, and will pause further supplies on this account.

We value working with [Company] and hope to resolve this without that step.

Regards,

[Name, designation, phone]

Only write what you are actually willing to do. An empty threat in a final notice teaches the client that your deadlines mean nothing.

The MSME 45-day rule, in plain words

The Micro, Small and Medium Enterprises Development (MSMED) Act, 2006 gives registered micro and small suppliers specific protection against late payment. Medium enterprises are not covered by these payment sections. The main points:

• Section 15: The buyer must pay on or before the date agreed in writing. That agreed period cannot exceed 45 days from the day the goods or services are accepted (or deemed accepted). If there is no written agreement on terms, payment is due within 15 days.
• Section 16: If the buyer pays late, they owe compound interest with monthly rests at three times the bank rate notified by the RBI, from the appointed day. This applies even if your contract says something different.
• Section 18: Either party can refer a dispute about the amount due to the MSE Facilitation Council (MSEFC) of the supplier’s state. The council first tries conciliation and, if that fails, moves to arbitration or refers it on.

“Bank rate” is not the repo rate. It is a separate rate the RBI publishes, so check the current figure on the RBI website before you quote interest in a claim.

There is a tax angle that makes larger buyers pay attention too. Section 43B(h) of the Income-tax Act, 1961, introduced from assessment year 2024-25, generally lets a buyer deduct a payment owed to a micro or small enterprise only in the year it is actually paid, if it is paid after the MSMED Act time limit. Traders registered on Udyam are treated differently from manufacturers and service providers here, and the new Income-tax Act, 2025 took effect on 1 April 2026, so ask your CA how this applies to a specific client rather than quoting it in a reminder.

Laws, rates and portals change. Check the official sources and consult a professional before relying on any of this for a claim.

A worked example (illustrative)

Say a packaging unit in Rajkot, registered as a micro enterprise, supplies boxes worth Rs 2,00,000 to a food brand. The goods are accepted on 1 September, and the purchase order says payment within 45 days. Payment is therefore due by 16 October. If the buyer pays in late November, the supplier can claim interest on Rs 2,00,000 for the delay, compounded monthly at three times the bank rate. The actual figure depends on the bank rate in force, so calculate it on the day you file.

Filing a delayed-payment case: Samadhaan and the ODR portal

The Ministry of MSME runs MSME Samadhaan, a delayed-payment monitoring system where micro and small suppliers file applications against buyers before their state’s MSEFC. As of October 2026, the Samadhaan page states that all new delayed-payment applications are filed on the MSME ODR portal, so start there for a fresh case. Samadhaan remains the reference for how the system works and the status of older cases.

Who can file: any micro or small enterprise with a valid Udyam Registration. The registration should generally predate the supply in question, so if you are not registered yet, register now so you are covered for future invoices.

What to keep ready:

1. Udyam Registration certificate
2. Purchase order, contract or email confirming the order and payment terms
3. Invoices and proof of delivery or acceptance (delivery challan, signed receipt, completion email)
4. Ledger statement showing the outstanding amount
5. Copies of your reminders and the final notice, with dates
6. Buyer’s full legal name, address, GSTIN and contact details

According to the Samadhaan page, every reference made to the MSEFC is to be decided within 90 days. In reality, timelines vary by state and caseload, so treat the case as a pressure tool and keep negotiating while it runs. Many buyers settle once they receive notice from the council.

Calls, escalation and keeping the relationship

Messages do most of the work, but one well-timed call often closes a stuck payment. Call at stage 4, and keep it short:

• Open with the facts: invoice, amount, days overdue.
• Ask one question: “What is stopping this payment?”
• Agree on a date and a name. “So Priya in accounts will release it by Friday?”
• Send a one-line email confirming what was agreed, the same day.

Escalate up, not sideways. If your contact cannot get it released, ask politely who can, and copy that person on the next email. Most firms have someone whose job includes keeping vendor relationships clean.

Preventing late payments next time

The best reminder is the one you never need to send. A few changes at the start of a job save weeks of chasing later:

• Agree payment terms in writing before work starts, inside the 45-day MSMED limit if you are a micro or small supplier.
• Take an advance of 30 to 50 percent for new clients and custom work.
• Bill in milestones on long projects, so you are never owed for three months of work at once.
• Collect the accounts contact and the vendor onboarding form at the start, not when the first invoice is late.
• Use payment links and UPI QR codes on invoices to make paying easy.

Frequently Asked Questions

How do I politely remind a client about payment on WhatsApp?

Keep it short and factual. Mention the invoice number, amount and due date in the first line, attach the invoice, and give a UPI ID or payment link. End with an offer to help, such as asking if accounts needs anything. Avoid emojis and guilt-tripping.

What is the 45-day payment rule for MSMEs?

Under Section 15 of the MSMED Act, 2006, a buyer must pay a micro or small supplier by the agreed date, and that agreed period cannot exceed 45 days from acceptance of the goods or services. If no period is agreed in writing, payment is due within 15 days.

How much interest can I charge on delayed MSME payments?

Section 16 of the Act provides compound interest with monthly rests at three times the bank rate notified by the RBI. Check the current bank rate on the RBI website when you calculate it, because it changes with policy decisions.

Can a medium enterprise use MSME Samadhaan?

No. The delayed-payment protection and the Samadhaan and ODR filing route are meant for micro and small enterprises with valid Udyam Registration. Medium enterprises have to rely on their contract and the regular legal process.

Should I charge late-payment interest in my first reminder?

Usually not. Raising interest in the first message sounds aggressive and often slows things down. Mention it calmly from the second overdue reminder onward, and state it clearly in the final notice.

What if the client disputes the invoice?

Ask for the dispute in writing, with specific points. Fix genuine errors quickly with a revised invoice or credit note, and ask for the undisputed part to be paid now. Unresolved disputes over the amount can also go to the MSEFC if you are eligible.

Your next step

Copy these templates into a shared note or your accounting tool, fill in your bank and UPI details once, and set calendar reminders for each stage of the ladder. If you are a micro or small business and not yet on Udyam, register this week so your future invoices carry full protection. A system turns chasing money into a routine, not a fight.