GST invoices that
get paid.
BillFast builds GST tax invoices for Indian freelancers: correct tax split from state codes, payment details on the PDF, client records, public share links, and follow-up copy when payments lag.
Free and lifetime
Create GST invoices free. Unlock the full suite for ₹399, once.
| Capability | Free | Lifetime (₹399) |
|---|---|---|
| GST tax engine CGST/SGST or IGST from seller and buyer state | Included | Included |
| PDF export with payment block UPI QR and Razorpay link on the invoice | PREVIEW watermark | No watermark |
| Buyer details and client book Save GSTINs and reuse buyer details | — | Unlimited clients |
| Public share links Read-only invoice page at /i/[token] | — | Included |
| Payment reminder copy Ready text with amount and share link | — | Included |
| Bill again Duplicate an invoice for retainers | — | Included |
| Pricing Billing model | ₹0 | ₹399 one-time |
Invoicing is the first step.
Collecting payment is the work.
You've sent the PDF. Accounts still needs a GST split or a UPI ID. BillFast puts both on the invoice so payment is not a separate thread.
GSTIN, HSN/SAC, and CGST+SGST or IGST from seller and buyer state.
UPI QR and payment link sit on the PDF — not buried in email.
Follow-up text with amount due and the share link.
CGST, SGST, or IGST — calculated for you.
BillFast reads the state codes on seller and buyer GSTINs and applies intra-state CGST+SGST or inter-state IGST.
Invoice sent.
Money next.
No more asking clients to copy a UPI ID from chat. The PDF and share page carry a QR code and a payment link.
Know who paid. Know who didn't.
Track invoices as draft, unpaid, partial, or paid — then bill again when the next cycle starts.
Draft Mode
Edit seller details, items, and tax rates in your browser. Stored safely without lock-in.
Awaiting Payment
Public share link active at /i/[token]. 1-click copy WhatsApp payment reminder.
Milestone Advance
Log initial project deposits or installment payments with automatic balance updates.
Settled & Closed
Marked paid in full. 1-click "Bill Again" duplicates the invoice for the next billing cycle.
Four steps to a GST invoice.
Parties, line items, PDF, then share and collect. No accounting-suite onboarding.
₹399 once. Lifetime access.
One payment unlocks the full invoice suite on this account. No monthly plan.
- Recurring charge
- Built for larger teams and ERPs
- Access tied to renewals
- PDFs without watermark
- Buyer details and saved clients
- Share links at /i/[token]
- Payment reminder copy
- Bill again (duplicate)
Built for freelancers who invoice under GST.
I'm Misbah. I needed tax invoices that accountants would accept: correct CGST/SGST or IGST, HSN/SAC, and payment details on the same PDF. Most tools either ignored Indian GST or charged a monthly fee for the basics.
BillFast is that tool: GST from state codes, UPI on the invoice, a client book, share links, and follow-up copy. Lifetime is ₹399, once, on your account.
Frequently asked questions
GST, payments, and what lifetime includes.
No. BillFast is an invoice suite: GST invoices, payment links on the PDF, client address book, public share links, bill-again duplicates, and payment reminder copy. PDF export is one output.
Create a GST invoice. Share it. Collect payment.
Start free. Unlock lifetime for ₹399 when you need the full workflow.