Billing & Invoice Software -- Partial Payments & GST

Zoho Invoice charges $15-$45/month. FreshBooks starts at $17/month. For small businesses that send 50-200 invoices a month, those fees add up to $180-$540/year. Our billing kit costs $49-$99 one-time. It handles GST-compliant invoice generation, partial payment tracking with balance calculations, payment reminders via email and WhatsApp, client and vendor management, expense tracking, and financial reports including P&L and outstanding receivables. The kit works for freelancers invoicing clients, small businesses billing customers, and agencies managing multiple client accounts. Generate professional invoices, track who owes you money, and get paid faster.

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The CodeAj billing kit includes GST-compliant invoicing, partial payment tracking, payment reminders, client management, expense logging, and P&L reports. Supports multiple currencies and tax regimes. Full source code from $49.

  • 100% Source Code
  • Free Setup Support
  • 5000+ Students Served
  • Free Updates

Billing Features for Real Businesses

This isn't a basic receipt generator. It's a full invoicing system with the features accountants actually need.

Invoice Generation

Create professional invoices with your logo, company details, line items with HSN/SAC codes, tax calculations (GST, CGST, SGST, IGST), discounts, and payment terms. Recurring invoices auto-generate on schedule. Proforma invoices convert to tax invoices with one click. Credit notes and debit notes handle adjustments.

Partial Payment Tracking

Customers rarely pay everything at once. The kit tracks partial payments against invoices, calculates outstanding balances, and shows aging reports (30/60/90 days overdue). Each payment is logged with date, amount, method, and reference number. The invoice status updates automatically: unpaid, partially paid, paid, overdue.

Payment Reminders

Automated reminders go out before due dates and after. Configure reminder schedules -- 7 days before, on due date, 7 days after, 30 days after. Reminders send via email with the invoice PDF attached. WhatsApp integration sends friendly payment nudges. Reminder history logs prevent duplicate sends.

Financial Reports

Revenue report by month, quarter, and year. Outstanding receivables with aging breakdown. Expense tracking by category. Profit and loss statement. Tax summary for filing returns. Client-wise revenue ranking. All reports export to PDF and Excel.

Why Choose CodeAj

Complete Source Code

Get 100% working source code with clean architecture and documentation.

Free Setup Support

Our team helps you install and run the project on your machine at no extra cost.

Free Updates & Customization

Get free updates and affordable customization to match your requirements.

Who Uses the Billing Kit

Freelancers

Track time, generate invoices, and follow up on payments from one dashboard. Multi-currency support handles international clients. The client portal lets clients view and pay invoices online. No more chasing payments via email.

Small Businesses

Replace manual Excel-based billing with a proper system. Your accountant will thank you when tax season comes -- the GST summary report gives them exactly what they need for filing.

Agencies

Manage billing across multiple clients with different rates, payment terms, and currencies. Project-based invoicing links billable hours to specific engagements. Client statements show complete transaction history.

Billing Software FAQ

Yes. Full GST compliance with CGST, SGST, and IGST calculations based on state codes. HSN/SAC code support for line items. GST summary reports for monthly and quarterly filing. E-way bill generation for applicable transactions. Works for Indian businesses out of the box.

When a customer makes a partial payment, log the amount and method. The system calculates the remaining balance and updates the invoice status. Aging reports show outstanding amounts at 30, 60, and 90 days. Payment history is linked to each invoice.

Yes. Configure reminder schedules for before and after due dates. Reminders go via email with the invoice PDF attached. WhatsApp reminders are also supported. The system tracks which reminders were sent to avoid duplicates.

Yes. Create invoices in any currency with real-time exchange rate lookup. Revenue reports can be viewed in your base currency with conversion. Useful for freelancers and agencies with international clients.

Stop Chasing Payments Manually

Get the billing kit and automate your invoicing, payment tracking, and financial reporting.

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