GST-ready invoicing
Compliant invoices, quotes and credit notes with HSN/SAC, intra- vs inter-state CGST/SGST/IGST splitting, place-of-supply and UPI QR on the PDF.
Run your books without the spreadsheet chaos. GST-compliant invoices, TDS-aware payments, live reports, audit-grade exports.
Nidhi Books is journal-backed accounting reimagined for the small business owner. Create GST-compliant invoices with HSN/SAC and place-of-supply handling, capture TDS on every applicable payment, reconcile customer and vendor accounts, and pull live P&L, Cash Flow, AR/AP Aging and Sales Register reports. Export GSTR-1 (with B2B, B2C, CDNR and HSN summary), GSTR-3B summary, and TDS reconciliations (26AS / 26Q) as CA-friendly CSV — or take a period-close audit snapshot with a SHA-256 hash. Available on the 399apps cloud or self-hosted with full data ownership.
Best for
Small businesses · CAs and accounting firms · D2C brands · Service agencies
Works across
Retail · Services · Manufacturing · Wholesale & distribution
Compliant invoices, quotes and credit notes with HSN/SAC, intra- vs inter-state CGST/SGST/IGST splitting, place-of-supply and UPI QR on the PDF.
Every transaction posts to the ledger. You see the simple form; the journal stays clean and auditable.
P&L (accrual), Cash Flow, AR / AP Aging buckets, Sales Register and Stock Valuation — recalculated as you type.
B2B, B2C consolidated, Credit/Debit notes to registered customers, HSN-wise summary, and the GSTR-3B 3.1.a outward-supplies block — CSV in CA hand-off format.
Capture TDS on customer payments (Form 26AS-style) and on vendor bills (Form 26Q). Section-wise summaries across 194C / 194J / 194I and more.
Period-close snapshot: CSV manifest + PDF cover, signed with a SHA-256 hash. Statutory audits get the immutable trail they expect.
Specific, CA-friendly outputs that match what your accountant actually asks for at the end of the quarter — not generic dashboards. Everything below is shipping in Nidhi Books today.
Tax-compliant outputs ready to file or hand off to your CA.
GSTR-1 export (CSV)
Outward supplies — B2B, B2C consolidated (by state × rate), Credit/Debit notes to registered customers, and an HSN-wise summary. Section-headed CSV for direct CA upload.
GSTR-3B summary
Section 3.1.a outward-supplies block with taxable value and CGST/SGST/IGST breakdown for the period.
Sales Register
A chronological list of every invoice and credit note for the period with full tax breakup per row. Filterable by warehouse and period.
HSN-wise summary
Quantity, taxable value and tax by rate aggregated by HSN, using date-aware tax rates so historical periods stay accurate.
Place-of-Supply handling
Intra- vs inter-state detection drives CGST/SGST/IGST splitting on every line, every report.
TDS on AR (Form 26AS reconcile)
TDS withheld by your customers on receipts, grouped by customer and section — line up cleanly with 26AS at year end.
TDS on AP (Form 26Q reconcile)
TDS deducted on vendor bills, grouped by vendor and section — covers 194C, 194J, 194I-LB and more.
The numbers you actually run the business on, between filings.
Profit & Loss
Accrual-basis P&L. Sales minus COGS (from recorded bills) minus operating expenses. GST is excluded as a pass-through.
Cash Flow
Cash-basis movement — inflows from customer payments and vendor refunds, outflows from bill payments, expenses and customer refunds.
AR Aging
Receivables bucketed by days overdue (current, 1–30, 31–60, 61–90, 90+) with per-invoice outstanding amount.
AP Aging
Payables bucketed by days overdue, net of TDS deducted and vendor credit applied.
Stock Valuation
Per-item on-hand quantity, unit cost and total stock value — shared with the Nidhi Inventory module.
Get every record out — for CAs, for auditors, for your own systems.
Invoices CSV
Full invoice list with number, date, due date, customer, status, kind, subtotal, discount, tax and total. Respects every filter on the list page.
Payments CSV
Receipts list with date, customer, method, reference, amount, applied vs unapplied, TDS withheld and TDS section.
Customers CSV
Customer master with display name, company, GSTIN, email, phone, payment term and state.
GSTR-1 CSV (CA hand-off)
Same data as the on-screen GSTR-1, structured with section headers so your CA can drop it straight into their workflow.
Invoice PDF (Classic & Compact)
Per-invoice PDF with two template strategies and an embedded UPI QR for fast payment.
Customer-portal PDF
Share an invoice via a public token — your customer can view and download the PDF without an account.
Audit Export (period-close)
A snapshot CSV manifest plus a PDF cover, signed with a SHA-256 hash. Becomes an immutable record of the closed period.
Heads-up. On the roadmap (not yet shipped): Balance Sheet & Trial Balance, GSTR-2B / GSTR-9, e-invoice IRN, e-way bill, XLSX export and Tally sync. We will only show them here when they are real.
Same yearly pricing as every product on 399apps. No per-seat gotchas — unlimited users and exports on every plan. Growth includes one free core-workflow customisation.
| Plan | Audience | Cloud (yearly) | Self-host (yearly) | |
|---|---|---|---|---|
| Starter | B2B / B2C | ₹25,000/year Unlimited users + exports | ₹39,000/year Unlimited users · single-server licence | Talk to us |
| Growth | B2B / B2C | ₹49,000/year Everything in Starter + 1 free core customisation | ₹79,000/year Everything in Starter + 1 free core customisation | Talk to us |
| Scale | B2B | Talk to us For bigger ambitions — custom scope | Talk to us Source access, bespoke build, on-call support | Talk to us |
Prices are indicative for India and exclude GST. International pricing on request. White-label and enterprise scopes are bespoke.
Stock, SKUs, purchase orders, transfers, barcodes — one source of truth for every product you sell.
Books + Inventory in one subscription — 10% off the standard 399apps plan.
A complete matrimonial SaaS — profiles, matching, chat, verification — ready to brand and ship.
A short call. We will scope your setup, recommend cloud vs self-host honestly, and quote without games.