Invoice suite · Indian freelancers

Not just PDF invoices.
A suite to invoice, get paid, and chase what's owed.

BillFast helps you create GST-correct invoices, put UPI + Razorpay on the PDF, save clients, share unpaid invoices, bill again, and copy payment reminders — without a monthly SaaS trap.

Create your first invoiceUnlock lifetime · ₹399
CGST/SGST/IGST · HSN/SACUPI + Razorpay on every PDFClients · share links · reminders

The full invoice suite — free vs lifetime

Start free with GST invoices and PREVIEW PDFs. Unlock ₹399 lifetime for the pro workflow pieces freelancers actually need.

GST tax invoices

Free

CGST/SGST or IGST from state codes. HSN/SAC, line items, amount in words.

PDF with Pay Now

Free

UPI ID and Razorpay link printed on the invoice. Free tier includes a subtle PREVIEW watermark.

Basic editor

Free

Seller details, line items, notes, draft → unpaid → paid tracking.

No watermark PDFs

Lifetime

Clean, client-ready PDFs without the PREVIEW watermark.

Buyer details + address book

Lifetime

Enter bill-to clients on invoices. Save once and pick them next time.

Public share links

Lifetime

Share read-only unpaid invoices at /i/[token] with Pay Now on the page.

Bill again

Lifetime

Duplicate a past invoice as a new draft — retainers and repeat clients.

Payment reminders

Lifetime

Copy a WhatsApp-ready reminder with amount, UPI, pay link, and share URL.

Lifetime unlock

₹399

One payment. All pro suite features forever. Early access while BillFast is still scrappy.

Unlock full suite · ₹399 lifetime

Invoicing is step one. Getting paid is the job.

You've sent the PDF. You've followed up twice. Someone in accounts is "checking with sir." BillFast bundles the whole workflow.

01

GST invoices that pass accounts

Seller & buyer GSTIN, HSN/SAC, correct CGST+SGST or IGST. Your client's accountant stops sending it back.

02

Payment details on the PDF

UPI ID and Razorpay link where clients actually look. No more "what's your UPI again?"

03

Share, remind, bill again

Public share links, copy-paste reminders, and duplicate invoices — gated behind lifetime unlock.

Four steps. Under a minute.

No 47-field ERP. No "schedule a demo" call. Invoice, send, chase.

01

Add parties

Your GSTIN & state. Client's GSTIN & state. BillFast figures out the tax split.

02

Line items

Description, HSN/SAC, qty, rate, GST%. Maths happens automatically.

03

Download & share

PDF with Pay Now block. Share link for unpaid invoices (lifetime).

04

Get paid & chase

Copy reminders, mark paid, or bill again for the next cycle.

₹399 once. Not ₹399/month.

Lifetime Early Access while BillFast is still scrappy. One payment unlocks the full suite — forever.

Free
₹0

Real GST invoices. PREVIEW watermark on PDF.

  • Create GST invoices (CGST/SGST/IGST)
  • PDF with UPI + pay link section
  • Basic editor (seller, items, notes)
  • PREVIEW watermark on PDF
Start free
Early access · limited

Lifetime suite

₹399 one-time

Unlock the full invoice suite. Pay once, use forever.

  • Everything in Free
  • No watermark — ever
  • Buyer details + client address book
  • Share links · bill again · reminders
Pay ₹399 — unlock lifetime

Secure checkout via Razorpay. Unlock activates after payment.

Compare: most invoicing tools want ₹500–₹2,000/month. BillFast is ₹399 total for life.

Why this exists

Built by someone who's chased payments at 11pm.

I'm Misbah — freelancer, builder, tired of Word templates and wrong GST splits. BillFast is the suite I wanted: GST-correct PDFs, clients on speed dial, share links for unpaid invoices, and reminders without opening Notes.app. Early access is ₹399 because I'd rather have people who actually invoice than 10,000 free signups who never send one. Follow updates on X (@getbillfast).

FAQ

No. BillFast is an invoice suite: GST invoices, payment links on the PDF, client address book, public share links, bill-again duplicates, and copy-paste payment reminders. PDF export is one piece.
Yes. Tax invoices with GSTIN, HSN/SAC codes, and the correct CGST+SGST or IGST split based on seller and buyer state.
Free: create GST invoices (seller, line items), PDF with PREVIEW watermark. Lifetime (₹399): buyer details, remove watermark, client address book, share links at /i/[token], bill again, and payment reminder copy.
Your PDF includes Pay Now with your UPI ID and Razorpay payment link. Share pages show the same for unpaid invoices.
No. The full invoice flow works without API keys. For live lifetime unlock in production, set RAZORPAY_KEY_ID + RAZORPAY_KEY_SECRET (Checkout) and RAZORPAY_WEBHOOK_SECRET.

Open the suite. Send one invoice today.

Free to start. GST maths included. No credit card.

Open BillFastRead GST guides