GST invoices in 60 seconds.
No spreadsheet, no CA call.
Built for Indian freelancers, consultants, and one-person studios. CGST / SGST / IGST auto-calculated, GSTIN validated, PDF + WhatsApp share in one tap. Free during open beta.
Honest beta — we onboard the first 50 freelancers by hand. Email hello@kli.soand we’ll set you up the same day.
Example invoice
This is what your client receives
A real GST-compliant invoice rendered the same way InvoiceOS will send yours. CGST/SGST split shown for a Karnataka-to-Karnataka job.
Tax Invoice
Aarav Mehta Studio
GSTIN: 29ABCDE1234F1Z5 · Bengaluru, Karnataka
Invoice #
INV-2026-018
Date issued
29 May 2026
Billed to
Saanvi Industries Pvt Ltd
14 MG Road, Bengaluru 560001
GSTIN: 29AAGCS1234M1ZK
Due
12 Jun 2026
Net 14 days
| Item | Qty | Rate | Amount |
|---|---|---|---|
Brand identity sprint Logo, type system, brand guidelines doc | 1 | ₹65,000 | ₹65,000 |
Landing page design Desktop + mobile mocks, 3 rounds revisions | 1 | ₹35,000 | ₹35,000 |
Pay via UPI
aarav@okhdfcbank
Names, GSTINs, and amounts above are illustrative. Real invoices auto-pick CGST+SGST (same state) or IGST (different state) based on your buyer’s GSTIN.
Everything you need to invoice like a pro
Built specifically for Indian freelancers — handles all the GST complexity so you don't have to.
GST Invoice Builder
Build professional invoices with automatic CGST, SGST, and IGST calculation. GSTIN validated, invoice numbers auto-incremented, rates pre-filled.
PDF Generation
Export pixel-perfect PDF invoices with your business branding. Clients can view and download via a secure public link — no login needed.
UPI / pay-link sharing
Drop your UPI ID, Razorpay link, or bank QR into the invoice — clients pay however they like. We render it cleanly on the PDF and shareable web link.
Client Management
Save client details — name, GSTIN, address — once. InvoiceOS auto-applies inter-state or intra-state GST rules based on your states.
WhatsApp Sharing
Share invoice links directly via WhatsApp with one tap. Your client gets a message with the invoice link — no email required, no app to install.
Payment Tracking
Track every invoice from draft to paid. Get notified when money arrives, mark invoices paid manually, and never lose track of what you're owed.
From invoice to payment in minutes
No accounting degree required. InvoiceOS handles the GST math so you can focus on your work.
Set up your profile
Add your business name, GSTIN, address, and bank details once. InvoiceOS pre-fills every future invoice.
Add your client
Save client name, email, and GSTIN. InvoiceOS auto-selects IGST for inter-state, CGST+SGST for intra-state.
Create an invoice
Add line items, choose GST rates, and preview the PDF. Invoice numbers are auto-incremented and GST is calculated instantly.
Share and get paid
Send via WhatsApp or email with your UPI ID or pay-link baked in. Mark paid in one tap when the money lands.
Simple, transparent pricing
Start free, upgrade when you grow. No hidden fees, no per-invoice charges.
Free
Perfect for freelancers just starting out.
- 5 invoices per month
- Up to 3 clients
- GST calculation (CGST/SGST/IGST)
- PDF export
- Shareable invoice links
- Email support
Pro
For active freelancers billing regularly.
- Unlimited invoices
- Unlimited clients
- Custom PDF branding
- UPI / pay-link embed
- WhatsApp sharing
- Payment tracking
- Priority email support
Business
For small businesses with team needs.
- Everything in Pro
- Up to 5 team members
- Shared client address book
- Bulk invoice export
- Custom invoice domain
- Dedicated account support
No credit card required to start. KLI Hub Pro subscribers get InvoiceOS Pro included. See full pricing details →
Built for Indian freelancers
Ready to invoice like a pro?
Join Indian freelancers who send GST-compliant invoices in minutes, not hours. Free to get started — no credit card needed.
Create your first invoice →