Sequential, fiscal-year, calendar-year, monthly, date-stamped, or client-coded — pick a scheme, set your prefix, and generate the next 100 invoice numbers in one go. Paste your existing log and the tool flags conflicts before they hit your books.
01 — What you create
Pick a numbering scheme, set your prefix and start number, generate up to 100 invoice numbers, and cross-check against your existing log. Export a PDF for the finance binder and an XLSX series for your billing system.
Sonchoy Studio Pvt Ltd
GSTIN 29ABCDE1234F1Z5
NUMBERING SCHEME
FY 2026-27 series
Effective 23 May 2026
SCY-26-27-0001
FORMAT
SERIES PREVIEW (12)
+ rules block, conflict check, and audit signature in the PDF
Scanned invoices, multi-page batches, multi-currency stacks, and direct push into your accounting system. Free for 30 days, no card required.
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02 — How it works
Duplicate invoice numbers are the easiest way to fail an audit. The fix is a written scheme — a single rule everyone follows — plus a duplicate-check before any new number goes out. This tool packages both.
Sequential, fiscal year, calendar year, year + month, date-stamped, or client-coded. Each scheme answers a different question about when the counter resets.
Prefix, suffix, separator (dash, slash, dot, underscore, or none), pad length (3–6 digits), case. The next number renders live as you type.
Paste your existing invoice log; the tool flags any conflicts in red. Export the scheme as a PDF (for the finance binder) and the series as XLSX (drop into your billing system).
03 — Built for finance
Sequential · Fiscal year · Calendar year · Year + month · Date-stamped · Client-coded. Each scheme answers a different "when does this counter reset" question.
India (Apr–Mar), US Federal (Oct–Sep), calendar (Jan–Dec), or July-start. The fiscal-year tag updates per the issue date so April 2026 invoices stamp as 26-27 automatically.
Paste your existing invoice log; the tool diffs against the next-N series and flags conflicts in red. No more "Invoice 0247 already exists" emails from your accountant.
Prefix, suffix, separator (dash / slash / dot / underscore / none), pad length (3–6 digits), case (UPPER / lower / as-entered). Render the next number live as you tweak.
For agencies billing many clients, the "client-coded" scheme inserts a 3-letter tag (NWB, ACME, etc.) between the prefix and the FY counter — easy reconciliation per client.
PDF: branded header, format-choices table, next-number hero, series preview with conflict markers, rules block, audit signatures. XLSX: Summary, Series, Used numbers.
Bulk OCR, batch invoicing, multi-party e-signing, redaction, audit logs — pdfFiller picks up where Sonchoy ends. Free for 30 days, no credit card.
Run 100+ invoices, statements, or conversions in one go.
Turn paper invoices into searchable, exportable data.
Multi-party signatures with full audit trails.
Mask sensitive ledger lines before sending to auditors.
04 — Common questions
Sequential, gap-free invoice numbering is a standard audit requirement in most jurisdictions — it makes it impossible to quietly remove an invoice from the books. In India under GST, invoice numbers must be consecutive and unique per fiscal year. In the UK and EU, VAT invoices must carry sequential numbers. Even outside formal regulation, your accountant or auditor will expect them; gaps and duplicates are immediate red flags.
On the first day of your chosen fiscal year. India: 1 April. US Federal: 1 October. Calendar: 1 January. The tool picks the FY tag based on the "effective date" you set — an invoice issued in March 2027 stamps as 26-27; one issued 2 April 2027 stamps as 27-28. The counter inside that FY restarts at "Starts at" (typically 1).
It inserts a per-client tag between the prefix and the fiscal-year counter: e.g. SCY-NWB-26-27-0001 for Northwind, SCY-ACME-26-27-0001 for Acme. Useful for agencies and managed-services firms that want per-client sub-sequences while keeping a single global prefix. Each client effectively gets its own counter.
Paste your existing log of issued invoice numbers (one per line, or comma-separated) into the "conflict check" box. The tool diffs that list against the next-N numbers in your generated series and highlights any match in red — both in the on-page preview and on the exported PDF. Bump the "Starts at" number or change the scheme until the conflicts clear.
Yes — the "Copy series to clipboard" button puts a newline-separated list on your clipboard, ready to paste into a Google Sheet, Excel, or any billing tool. The XLSX export also includes a dedicated "Series" sheet with column headers, which most accounting tools can ingest directly.
PDF (top accent stripe, branded business header, "INVOICE NUMBER SCHEME" block top-right with scheme name / effective date / format, large next-invoice-number hero card, format-choices table, series preview table with conflict markers in red, optional rules block, optional dual audit-signature block) and XLSX (3 sheets: Summary, Series, Used numbers).
05 — Related tools