GST Savings Calculator

Compare your annual costs and tax savings with and without GST registration. Make a data-driven decision for your business.

Your Business Details
Total cost of goods/materials/services purchased
Accountant fee + software + your time cost estimate
Enter your details →
—
GST Paid on Purchases (ITC) —
Output GST on Sales —
Net GST Cash Outflow (Registered) —
Annual Compliance Cost —
Total Annual Cost (Registered) —
Total Annual Cost (Unregistered) —
Net Annual Benefit of Registration —
Cost Comparison: Registered vs Unregistered
When GST Registration Makes Sense

Register voluntarily if: Your customers are mostly registered businesses (B2B) — they can claim ITC on your invoices, making you more competitive. Your input costs are high — large ITC benefits reduce your effective purchase cost. You want to expand interstate or sell on Amazon, Flipkart, or other e-commerce platforms (mandatory registration required). You want access to formal credit and banking facilities that require GST registration.

Stay unregistered if: Your customers are all consumers (B2C) — they don't need GST invoices or ITC. Your input costs are very low (minimal ITC benefit). Your turnover is well below the threshold and you want to keep compliance overhead minimal. Your margins would be squeezed by having to remit output GST.

This calculator provides a simplified financial analysis. Actual savings vary based on ITC eligibility, exempt supplies, RCM obligations, and business-specific factors. Consult a CA for a comprehensive analysis.

When GST Registration Saves Money (and When It Doesn't)

✓ GST registration is beneficial when:

  • Your customers are GST-registered businesses — they can claim ITC on your invoices, making you a preferred supplier
  • Your input costs are high relative to turnover — ITC on raw materials, rent, utilities, professional services adds up significantly
  • You supply to large corporates or government — many mandatorily require GST invoices from vendors
  • You export goods or services — zero-rated status allows full ITC refund on inputs
  • Your turnover is growing and will cross ₹40 lakh (goods) or ₹20 lakh (services) threshold anyway

✗ GST registration may not be beneficial when:

  • Your customers are mostly end consumers (B2C) who cannot claim ITC — GST increases your effective price to them
  • You have minimal input costs — ITC savings don't offset compliance costs
  • Your business model is service-based with low overheads — cost of CA for GST filings may exceed ITC savings
  • You supply predominantly exempt goods/services — registration adds compliance without ITC benefit
  • Your turnover is well below threshold and unlikely to grow rapidly
ITC Categories — What You Can Claim
Raw Materials & Stock
✓ Full ITC
GST on goods purchased for resale or manufacturing — fully claimable
Rent (Commercial)
✓ Full ITC
GST on commercial premises rent — fully claimable
Professional Fees
✓ Full ITC
CA, lawyer, consultant fees — claimable (except personal legal services)
Software & IT Services
✓ Full ITC
SaaS, cloud, IT consulting — fully claimable for business use
Office Equipment
✓ Full ITC
Computers, printers, furniture — claimable as capital goods ITC
Advertising & Marketing
✓ Full ITC
Digital ads, print, outdoor — fully claimable
Motor Vehicle (≤13 seats)
✗ Blocked
Blocked under Section 17(5) — no ITC on cars unless taxi business
Employee Food & Canteen
✗ Blocked
Staff meals, outdoor catering — blocked under Section 17(5)
Voluntary Registration — Key Considerations

Annual compliance cost (estimate)

  • GSTR-1 filing: 12 returns/year (monthly)
  • GSTR-3B filing: 12 returns/year
  • GSTR-9: 1 annual return
  • CA/practitioner fees: ₹8,000–₹25,000/year depending on complexity
  • GST software subscription: ₹2,000–₹8,000/year
  • Time cost: 3–5 hours/month for a small business

Break-even: if your monthly ITC savings exceed ₹1,000–₹2,000, registration typically pays off.

Threshold limits for mandatory registration

  • Goods suppliers: ₹40 lakh annual turnover (₹20 lakh for special category states)
  • Service providers: ₹20 lakh annual turnover (₹10 lakh for special category states)
  • Interstate supplies: Mandatory regardless of turnover
  • E-commerce sellers: Mandatory regardless of turnover
  • Casual taxable persons: Mandatory regardless of turnover
  • Reverse charge recipients: Mandatory if applicable
Frequently Asked Questions
For B2C customers, registration means you collect GST on top of your price, which they cannot recover — effectively a price increase for them. For B2B customers, it makes no net difference (they claim ITC). The impact depends on your customer mix.
If you registered voluntarily and want to cancel, you can apply for voluntary cancellation after one year from the date of registration. Mandatory registrants cannot cancel as long as they remain above the threshold or continue the activity requiring registration.
Beyond the accountant fee, hidden costs include: time spent on bookkeeping and reconciliation, cash flow impact of paying GST before collecting from customers, risk of penalties for errors, and cost of any tax demands arising from audits or notice responses.