GST Invoicing & Collections
Billing is where revenue becomes cash, and where small errors cost the most: a wrong tax rate, a missed renewal, an invoice the customer never received. We build billing software around your pricing rules and collection process, so invoices go out correctly and payments are followed up automatically.
What this covers
Typical timeline
A billing system with GST invoicing and payment links typically goes live in 5–8 weeks; recurring billing and deeper integrations add a few weeks.
Who it is for
As a billing software development company, we handle the parts that make Indian billing hard: GST rules and HSN codes, e-invoicing and e-way bills, credit notes, part payments, and reconciliation with your bank and Tally. If your needs are standard, our own GST billing app, KhataFlow, may be enough; we build custom billing when your pricing, approvals or integrations do not fit a ready product.
Discuss your requirementDistributors and retailers with complex price lists, schemes and credit limits
Service businesses with recurring invoices, such as ISPs, schools, clinics and housing societies
Subscription and SaaS companies that need plans, proration and auto-debit
Companies whose billing is spread across Excel, Tally and manual WhatsApp reminders
Capabilities
B2B and B2C invoices with HSN/SAC codes, IRN and signed QR through an authorised GSP, e-way bills and GSTR-1 ready exports.
Fast counter billing with barcode scanners and thermal printers, multiple payment modes and day-end cash reconciliation.
Plans, proration, renewals and auto-debit through UPI Autopay or e-NACH mandates via Razorpay or Cashfree.
UPI and card payment links on every invoice, with automatic WhatsApp, SMS and email reminders for overdue amounts.
Returns and credit notes, customer ledgers, ageing reports and credit-limit checks before a new invoice is raised.
Invoices, receipts and credit notes pushed to Tally Prime or Zoho Books so your accountant works from the same numbers.
How we work
You always know what happens next, who is responsible and what you will receive at each stage.
Typical timeline
A billing system with GST invoicing and payment links typically goes live in 5–8 weeks; recurring billing and deeper integrations add a few weeks.
Goals, users, workflows, integrations and success metrics are mapped in a workshop.
Architecture, data model, security design and a milestone plan are signed off.
Two-week sprints with a working preview you can test at every step.
Functional QA, performance checks, VAPT and user acceptance before go-live.
SLA-backed support, monitoring and a roadmap for the next phase.
Deliverables
Technology & standards
We recommend tools based on your scale, budget and existing systems, not on what is fashionable. Every choice is explained in the proposal.
Engagement models
A discovery workshop produces a written scope, architecture and milestone plan with a fixed price before any build commitment.
A cross-functional squad (PM, engineers, QA, DevOps) working in two-week sprints on your roadmap, billed monthly.
SLA-backed maintenance, security patching and a monthly allocation of enhancement hours after go-live.
How pricing works: Every project is priced after a free discovery call: you receive a written scope with milestones and a fixed quote, so there are no surprises mid-way.
Get a quoteFAQs
If you need standard GST invoicing, ledgers and outstanding tracking, KhataFlow is faster and cheaper. Custom billing is worth it when you have unusual pricing, multi-level approvals, recurring plans or integrations that a ready product cannot handle. We will recommend whichever fits.
Yes. We integrate with an authorised GST Suvidha Provider so invoices get an IRN and signed QR code instantly, and e-way bills are generated from the same screen.
Yes. Every invoice can carry a UPI or card payment link, and payments are matched to invoices automatically through the gateway webhook.
Yes. Invoices, receipts and credit notes sync to Tally Prime, so accounting and GST return filing continue in the tools your accountant already uses.
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