Case Study · SaaS · Invoicing & Billing
HisaabKar
A multi-tenant cloud invoicing platform with bilingual English–Urdu invoices, FIFO payment allocation, inventory costing and Raast QR payments.
- Industry
- SaaS · Invoicing & Billing
- Built For
- Traders, retailers & service businesses
- Scope
- Software Development
- Stack
- Next.js 16 · REST API + document database · Tailwind CSS
Project Overview
HisaabKar replaces spreadsheets, chat receipts and paper ledgers with a cloud billing system built around how local traders actually get paid.
It is a true multi-tenant SaaS: companies self-register, invite their team with role-based permissions, and work across a dashboard, a point-of-sale module and a super-admin console.
The accounting logic goes deeper than an invoice template — payments are allocated to the oldest invoices first, inventory is costed FIFO, and every edit is written to an audit log.
What It Had to Do
- Issue professional invoices in English or Urdu from the same data
- Clear outstanding balances automatically, oldest invoice first
- Keep stock and cost of goods accurate on every invoice edit
- Support local payment rails, from bank transfer to Raast QR
Under the Hood
Key Features
Bilingual PDF invoices
Switch any invoice between English and Urdu with a full right-to-left layout set in Noto Nastaliq.
FIFO payment allocation
A single payment automatically clears the oldest outstanding invoices first and carries any remainder as credit.
FIFO inventory costing
Stock is reconciled on every invoice edit, with negative-stock flags and accurate cost of goods.
Raast QR on invoices
Invoices can embed Raast QR codes alongside cash, cheque and bank-transfer payment methods.
Ledgers & ageing reports
Per-customer ledgers, ageing buckets, collection trends and profit reports on a real-time dashboard.
Teams, roles & audit log
Multiple seats with custom roles, and every invoice edit recorded in an audit trail.
Status page & help centre
A public status page covering seven platform components and a 15-article help centre.
Installable PWA
A web app manifest lets businesses install HisaabKar on phones and desktops like a native app.
Built Mobile-First
Technology
Detected from the live site's source and response headers.
Next.js 16
App Router with prerendered marketing pages
REST API + document database
Multi-tenant auth, plans and checkout
Tailwind CSS
Light and dark themes
Zod
Schema validation across forms and API
Zustand
Client-side state management
Framer Motion
Interface animation with reduced-motion support
Verified on the Live Site
Search & Discoverability
- 34-URL sitemap covering core pages, blog and help articles
- hreflang alternates for English and Urdu
- LocalBusiness and FAQPage structured data
- Dashboard, POS, admin and API routes excluded from crawling
- Light and dark theme-color metadata
- Web app manifest with a full icon set
