What Is Accounts Payable? Definition, Process & the 2026 MSME 45-Day Rule (Explained Simply)

Meet Ramesh. He runs a small hardware shop in Vijayawada.

Every month, he buys cement, pipes, and paint from a wholesaler. The wholesaler doesn’t ask for cash on the spot. He says, “Pay me in 30 days.” Ramesh takes the goods, sells them to his customers, and pays the wholesaler later.

Until Ramesh pays, that money he owes is called accounts payable. It’s one of the first things you learn in commerce class and one of the most important things a real business tracks every single day. In this guide, we’ll explain it simply, with a real example, and a 2026 rule every business owner needs to know.

Definition of Accounts Payable

Accounts payable is money a business owes to the people it buys from. If you take goods or services now but agree to pay for them later, that unpaid amount is your accounts payable.

It’s shown on the balance sheet as a liability, because it’s money you owe, not money you own. Another name for it is bills payable, and it usually sits under the head ‘sundry creditors’.

Think of it like this: if accounts payable is what you owe others, accounts receivable is the opposite — what others owe you. Ramesh’s wholesaler, from the wholesaler’s own books, would call the same ₹30,000 bill “accounts receivable”. Same bill, two different names, depending on which side of it you’re standing on.

A Simple Example

Let’s go back to Ramesh. He buys cement worth ₹100,000 from his supplier, Ace Traders. Ace Traders gives him 30 days to pay.

From the day Ramesh receives the cement until the day he actually pays Ace Traders, that ₹1,00,000 sits in his books as accounts payable. Once he pays, it disappears from that list — the debt is cleared.

Accounts Payable vs. Accounts Receivable — Quick Comparison

Why This Matters More in 2026: The MSME 45-Day Rule

Here’s something Ramesh’s commerce textbook probably didn’t cover, because it’s a new rule. Since April 1, 2024, the government added a law called Section 43B(h) to the Income Tax Act.

Think of it like a school assignment with a hard deadline. If your supplier is a small, government-registered business (called an MSME — Micro or Small Enterprise), you must pay them within a set number of days:

• 15 days if there’s no written agreement about payment terms.
• Up to 45 days if you do have one, in writing.

Miss that deadline, and here’s the twist: you don’t just annoy your supplier. The government won’t let you count that purchase as a business expense for tax purposes — not until the year you actually pay it. It’s a bit like a late fee at a library, except instead of a few rupees, it can shift your entire expense to next year’s tax return.

• You may also owe extra interest on the late amount — three times the RBI’s standard bank rate, compounded monthly. That adds up fast.
• The rule only applies to suppliers registered as micro or small enterprises. A supplier can prove this with a document called a Udyam Registration Certificate.
• The important date to remember is March 31 — the end of the financial year. Any unpaid, overdue MSME bill on that date is the one that gets flagged.

If a small supplier feels they were paid too late, they can even raise it on the government’s MSME Samadhaan portal — a website built specifically to handle these complaints.

The Accounts Payable Process, Step by Step

Managing accounts payable isn’t just one step. It’s a small routine with several parts, and often more than one person is involved. Here’s how it usually goes:

1. Check the supplier’s credit terms — how many days you get to pay, any late fees, or any discount for paying early.
2. Confirm the supplier and place your order, following your usual buying process.
3. Once the goods arrive, record the bill in your books.
4. Write down the exact due date. This one step prevents most late-payment problems.
5. Keep an eye on bills as their due date gets close — an ageing report (a simple list sorted by how overdue a bill is) makes this easy.
6. Once you pay, record it against the correct bill so nothing gets paid twice or missed.
7. Send a short note to the supplier confirming the payment is done.

Using your full credit period wisely can help your cash flow. But forgetting a due date does the opposite — and now, thanks to the MSME rule, it can cost you at tax time too.

If your business still tracks this on paper or in scattered spreadsheets, it’s worth reading our piece on 5 signs your billing has outgrown spreadsheets — the same warning signs usually show up here as well.

A Simple 3-Step System to Never Miss a Deadline

You don’t need to be an accountant to stay on top of this. You just need a short, repeatable habit.

1. Set It Up Once

• Mark every supplier as MSME (micro/small), medium, or not registered. Ask for their Udyam certificate if you don’t have it yet.
• Get the credit period in writing for each supplier — this is what unlocks the full 45 days instead of the stricter 15-day default.

2. Run It Weekly

• Check your ageing report and flag anything getting close to its due date.
• If cash is tight, pay MSME suppliers first — the cost of paying them late is higher than with other vendors.

This fits naturally into the 30-minute daily cash review habit we’ve written about before — payables due that week belong in that same daily check.

3. Check It Monthly

• Look for any MSME bills still unpaid past 45 days, well before March 31 arrives.
• Match what your books show against what your suppliers say you owe, to catch mismatches early.

Managing Accounts Payable for Businesses in Andhra Pradesh

For shop owners, traders, and manufacturers across Andhra Pradesh, accounts payable isn’t just an exam topic — it decides how much cash is free for the next order, the next hire, or the next branch. A trader buying stock through Vizag’s port or a wholesaler in Vijayawada often deals with several suppliers, each with different credit terms, which makes tracking everything by memory or notebook risky.

As a business grows and adds suppliers or branches, this gets even harder to manage by hand — something we’ve explained in why costs grow faster than revenue as you scale. And if you’re paying suppliers late because customers haven’t paid you yet, our CredFlow guide for Tally and Busy users shows how the same tool that speeds up collections can also help you pay vendors on time. Just starting a business and want your registrations and billing set up right from day one? Our 90-day business plan guide covers that groundwork too.

Frequently Asked Questions

About AtTally Sofper Pvt. Ltd.

We’re AtTally Sofper Pvt. Ltd., an authorized Tally partner with over 27 years of experience, and offices in Visakhapatnam (Vizag) and Vijayawada.

We help businesses across Andhra Pradesh set up TallyPrime to track accounts payable properly — supplier-wise ageing, MSME flagging, and reports that make the 45-day rule easy to follow instead of a year-end scramble. We offer full online and remote support, so this setup rarely needs an office visit.

Want your accounts payable in order before it becomes a tax problem? Talk to our team for a free consultation.