BillGun: Invoicing & Billing at Gun Speed
Name the customer, list what you sold, done. BillGun handles automatic tax calculations (GST, VAT, Sales Tax), assigns sequential invoice numbers, and gives you a link your customer can open, pay, and print on any device.
Part of the Gun Apps Family. Integrated with BizGun™.
invoice Acme Ltd with 18% tax
10 x Notebook @ 120
3 x Chair @ 850
🧾 Invoice INV-2026-0007 created
For: Acme Ltd
• Notebook 10 × $120.00
• Chair 3 × $850.00
Total: $4,425.00 (+ $675.00 Tax)
📄 View / print: billgun.app/invoice-view?id=INV-2026-0007
Professional Invoices Generated in Seconds
See how BillGun formats your business details, taxes, discounts, and payment terms into clean, printable invoice documents.
Why Choose BillGun for Invoicing?
Built for business owners who want to get paid faster with zero administrative friction.
Gun Speed Generator
Type natural commands or build invoices in seconds with instant split-screen real-time document updates.
Automatic Multi-Tax
Handles regional taxes effortlessly: Indian GST with HSN codes, UK/EU VAT, or US Sales Tax.
Mobile Payment Links
Share clean invoice links over WhatsApp, SMS, or Email so clients can view and pay from any device.
Frequently Asked Questions
Everything you need to know about BillGun.
What is BillGun and how does it work at Gun Speed?
BillGun is an online invoicing and billing platform designed for instant creation. You can type natural commands like "Invoice Acme Corp $1500 for Web Design" or build pixel-perfect invoices with automatic tax, discounts, and real-time live preview.
Can BillGun calculate regional taxes like GST, VAT, or Sales Tax?
Yes! BillGun supports automatic multi-tax calculations including GST (with HSN/SAC codes), UK/EU VAT, and US Sales Tax with flexible percentage rules.
How do clients view, print, or pay my invoices?
Each invoice generates a mobile-friendly shareable link. Clients can open the invoice link on any phone or desktop, view line items, print, or save clean PDF invoices instantly.
Is there a free trial and do I need a credit card?
Yes, every account starts with a 7-day free trial with no credit card required. Test all invoice creation, PDF downloads, and client management features risk-free.
Is BillGun part of the Gun Apps Family and BizGun™?
Yes! BillGun is part of the Gun Apps Family and integrates seamlessly with BizGun™. BillGun also operates as a standalone SaaS app at BillGun.app.