Billing & White-Label
GST done right. Quietly. Every month.
Invoices generate automatically with 18% GST applied, GSTIN captured per org, and PDFs available for download. Your accountant will thank you.
The problem
Most foreign SaaS tools don't speak GST. Indian operators end up rebuilding invoicing in spreadsheets every month.
How Callswala solves it
Callswala treats GST as a first-class citizen — applied automatically on every wallet top-up, recurring rental and usage charge.
What you get
Auto 18% GST
Applied on every invoice line; no manual math.
Per-org GSTIN capture
Stored and printed on every invoice.
PDF downloads
Generate, regenerate or delete invoices from the UI.
Reseller-aware billing
Invoices are issued by the reseller to the client (or by Master to the reseller).
FAQs
What about reverse charge?▾
Reverse-charge labeling is supported on cross-state B2B invoices.