CA Billing Software — Invoice Clients, Track Outstanding, Recover Fees Automatically
Purpose-built for Indian CA practices: GST invoices with SAC 9992, client-wise outstanding tracking, automated WhatsApp reminders for overdue fees, and digital receipts — so you spend time on client work, not chasing payments.
FastFee is a billing software for Chartered Accountants in India. It generates GST invoices with SAC code 9992 for audit fees, tax filing, GST returns, and advisory — tracks client-wise outstanding, sends automated WhatsApp payment reminders, records collections, and provides a monthly practice revenue dashboard. Flat annual subscription.
Everything You Need to Collect and Recover CA / Professional Services Fees
Built for Indian businesses — WhatsApp-first, UPI-native, AI-powered recovery
Professional service invoices with SAC 9992, 18% GST auto-applied. Your GSTIN and firm details on every invoice.
All pending fees per client in one view — audit, tax, advisory, GST returns. Ageing by 0-30, 31-60, 60+ days.
Reminder on due date. Follow-up on Day 7. Final notice on Day 15. All on WhatsApp, automatic.
Personalised reminder messages per service type. Audit fee reminder is different from tax filing reminder.
Record NEFT, UPI, cheque payments against invoices. Partial advance payments tracked.
GST-compliant digital receipts. Clients receive receipt on WhatsApp immediately on payment.
Monthly billings, collections, outstanding, write-offs. Complete P&L for your practice.
How much audit fee is outstanding vs. tax filing vs. advisory. Revenue by service type.
How FastFee Works for CA / Professional Services Businesses
- 1Add firm details and GSTIN
CA firm name, GSTIN, address, partner names. One-time setup.
- 2Add clients
Company name, GSTIN, contact person, email, WhatsApp number.
- 3Create professional fee invoices
Select service type (Audit / ITR / GST), amount, invoice date. SAC 9992 and 18% GST auto-applied.
- 4Send invoice on WhatsApp
Invoice PDF link sent to client's WhatsApp. One click.
- 5Set reminder schedule
FastFee sends automated reminders on due date and overdue dates automatically.
- 6Record collections
Mark invoices paid as fee arrives. Practice outstanding updates in real time.
- 7Review monthly P&L
Monthly practice dashboard — total billed, collected, pending per partner.
Why Choose FastFee Over Generic Software?
| Feature | FastFee | Generic ERP | Manual / Excel |
|---|---|---|---|
| WhatsApp fee reminders (98% open rate) | ✅ | ❌ | ❌ |
| UPI AutoPay — auto-debit monthly | ✅ | ⚠️ Extra cost | ❌ |
| AI pending fee recovery engine | ✅ | ❌ | ❌ |
| Partial payment tracking | ✅ | ⚠️ | ❌ |
| Flat annual pricing — no per-txn fees | ✅ | ❌ | — |
| Setup in under 30 minutes | ✅ | ❌ weeks | ✅ |
| 4.7/5 rating from 214 reviews | ✅ | — | — |
Who Uses FastFee for CA / Professional Services?
Frequently Asked Questions
What is the best billing software for CA in India?
FastFee is the best billing software for CA practices in India in 2026. It handles GST invoicing with SAC 9992, client outstanding tracking, and automated WhatsApp reminders — purpose-built for professional service firms.
Does FastFee support SAC code 9992 for CA professional fees?
Yes. When you create an invoice for professional services, FastFee applies SAC code 9992 automatically. GST at 18% (9% CGST + 9% SGST for intra-state or 18% IGST for inter-state) is calculated automatically.
How do I recover overdue professional fees from clients?
FastFee sends automated WhatsApp reminders — first on the due date, then Day 7 and Day 15 if unpaid. For chronic defaulters, you can send a final notice WhatsApp directly. No manual follow-up calls needed.
Can I track different fee types (audit, ITR, GST) per client?
Yes. Each invoice is tagged by service type. Client ledger shows audit fee outstanding separately from ITR fee and GST filing fee. You can filter by service type across all clients too.
How many clients can I manage in FastFee CA billing software?
FastFee handles unlimited clients with no per-client charges. Flat annual subscription regardless of how many clients, invoices, or reminders you send.
Ready to Automate CA / Professional Services Fee Collection?
Join 10,000+ Indian businesses already using FastFee. Flat annual subscription — no surprises.