The GST Maze: A Guide to Accounting Entries

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May 15, 2026

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The GST Maze: A Guide to Accounting Entries

If you run a business in India, GST isn’t just a monthly compliance chore. It moves through your books with every purchase, every sale, every payment to the government, and every return you file. The challenge is simple: misclassify one entry, and your returns won’t match, your ITC gets stuck, and your books start drifting away from the GST portal.

So let’s break down GST accounting entries the way accountants actually use them. Clear, Practical, and accurate enough to match your GSTR-3B and GSTR-2B without drama.

Understanding how GST flows in accounting

Before jumping into entries, GST is never an income or an expense for a registered business. It’s always a current asset (Input Tax Credit) or a current liability (Output Tax).

What this really means is:

When you buy something, GST becomes your ITC receivable.
When you sell something, GST becomes your GST payable.
When you pay the government, you clear that liability.

The tricky part is matching these numbers with the portal. But if your accounting entries are right, matching becomes much easier.

GST accounting entries on purchases

Whenever you buy goods or services, you record two things:

The actual cost of the product/service.
The GST paid on it (which becomes ITC)

A. Purchase of goods (Intra-State: CGST + SGST)

Assume that you purchase commodities worth 1,00,000 rupees with 18 percent GST.

CGST: 9,000
SGST: 9,000

Entry:

Particulars	Debit (₹)	Credit (₹)
Purchase A/C Dr	1,00,000
Input CGST A/C Dr	9,000
Input SGST A/C Dr	9,000
To Creditor A/C		1,18,000

B. Purchase of goods (Inter-State – IGST)

Commodities worth ₹1,00,000 with IGST @ 18% = ₹18,000

Entry:

Particulars	Debit (₹)	Credit (₹)
Purchase A/C Dr	1,00,000
Input IGST A/C Dr	18,000
To Creditor A/C		1,18,000

C. Purchase return

If you return goods, reverse the entry:

Creditor A/C………………Dr
To Purchase A/C
To Input CGST A/C
To Input SGST A/C

This adjustment lowers your purchase value as well as ITC.

GST accounting entries on sales

Sales entries mirror purchase entries, only now the GST you collect becomes a liability.

A. Sale of goods (Intra-State – CGST + SGST)

Suppose you sell goods worth ₹2,00,000 with GST 18%.

CGST: ₹18,000
SGST: ₹18,000

Entry:

Particulars	Debit (₹)	Credit (₹)
Debtor A/C Dr	2,36,000
To Sales A/C		2,00,000
To Output CGST A/C		18,000
To Output SGST A/C		18,000

B. Sale of goods (Inter-State – IGST)

Sale value: ₹2,00,000
IGST @ 18% = ₹36,000

Entry:

Particulars	Debit (₹)	Credit (₹)
Debtor A/C Dr	2,36,000
To Sales A/C		2,00,000
To Output IGST A/C		36,000

C. Sales return

Reverse the entry:

Particulars	Debit (₹)	Credit (₹)
Sales A/C Dr	Sales value reversed
Output CGST/SGST/IGST A/C Dr	GST reversed
To Debtor A/C		Total amount

How to record ITC (Input Tax Credit)

Input GST is an asset because you can adjust it against your output tax. At month-end, you adjust ITC against Output GST:

A. Adjusting ITC against output liability

If Output GST is ₹60,000 and ITC available is ₹40,000:
Net payable = ₹20,000

Entry:
Output CGST/SGST/IGST A/C……Dr
To Input CGST/SGST/IGST A/C

(This reduces your liability using ITC.)

Paying GST to the government

Whatever liability remains after the ITC adjustment must be paid in cash through the GST portal.

Assume ₹20,000 is payable via cash ledger.

Entry:

Particulars	Debit (₹)	Credit (₹)
GST Payable A/C Dr	20,000
To Bank A/C		20,000

Accounting entries for RCM (Reverse Charge Mechanism)

RCM is where things get confusing for most businesses.

Under RCM:

You pay GST yourself
You also claim ITC on that same GST (if eligible)

Example: You received services worth ₹50,000 under RCM @ 18%

GST payable under RCM = 9,000

At the time of booking expense:

Particulars	Debit (₹)	Credit (₹)
Expense A/C Dr	50,000
To Creditor A/C		50,000

Recording RCM GST liability:

Particulars	Debit (₹)	Credit (₹)
RCM CGST A/C Dr	4,500
RCM SGST A/C Dr	4,500
To GST Payable A/C		9,000

When paying RCM GST:

Particulars	Debit (₹)	Credit (₹)
GST Payable A/C Dr	9,000
To Bank A/C		9,000

Booking ITC of RCM:

Particulars	Debit (₹)	Credit (₹)
Input CGST A/C Dr	4,500
Input SGST A/C Dr	4,500
To RCM CGST A/C		4,500
To RCM SGST A/C		4,500

This way, RCM becomes tax-neutral.

GST on advances

You must record GST when an advance is received for goods or services

A. When advance is received

Advance Received A/C…………Dr
To Output CGST/SGST/IGST A/C
To Customer A/C

B. When invoice is issued

Reverse the GST collected earlier and book a normal sale entry.

GST Refund Entries

If you receive a refund of excess cash ledger balance or ITC, simply pass:

Bank A/C……………………………Dr
To GST Refund Receivable A/C

When the refund is approved:

GST Refund Receivable A/C……Dr
To GST Receivable/ITC A/C

How these entries map to GST Returns

Here’s a quick alignment so your books match the portal:

Accounting Item	GST Return
Output GST	GSTR-1 & 3B
Input GST	GSTR-2B & 3B
GST Payable after ITC	GSTR-3B
RCM liability	GSTR-3B (Table 3.1)
ITC reversal	GSTR-3B (Table 4B)

Common mistakes businesses should avoid

Here are mistakes that create mistakes and notices:

Recording purchase GST without checking if ITC is eligible
Treating IGST as CGST or SGST by mistake
Not reversing ITC on purchase returns
Forgetting to book RCM entries
Mismatching GSTR-1 and the books' sales value
Adjusting ITC before checking 2B availability

Fix these, and your books will run smoother than most small businesses.

Conclusion

GST accounting isn’t complicated if you understand how the tax moves inside your books. Every entry is either building an asset (ITC) or creating a liability (Output GST). Once you internalize that flow, the monthly ritual of filing 3B, reconciling 2B, and paying tax becomes far easier. Make sure that your entries are clean, every few months, submit them to the portal, and you will never find yourself in the GST maze.

Also read: How to Track GST Payment Status & GST Payment Failures.