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About this tool
Generate sequential or date-based invoice numbering schemes in bulk, with prefixes, padding and period resets.
Invoice Number Generator builds a full invoice numbering series in one pass: you pick a prefix, a date segment, a separator and a zero-padded counter, and it generates every number in the batch. Choose whether the counter runs straight through or resets each month, each calendar year, or each Indian financial year (April to March). It is built for freelancers, small businesses and accountants who need a numbering scheme that stays unique, sequential and audit-friendly.
Open Invoice Number Generator on AltFTool — it loads instantly in your browser.
Provide your input — an image, text, or data.
Let the tool analyze or generate the result.
Review, refine, and reuse the output wherever you need it.
Run one continuous sequence, or reset the counter monthly, per calendar year, or per Indian financial year.
The tool warns you when a scheme would repeat a number or overflow the padding width mid-series.
Copy the whole list to the clipboard, or download a CSV with the number, sequence value and period date.
Under the CGST Rules a tax invoice needs a consecutive serial number, unique for a financial year, up to 16 characters using letters, digits, hyphens and slashes. This tool keeps numbers within those characters, but treat this as general information and confirm with your accountant.
Many Indian businesses reset the counter at the start of each financial year and put the FY in the number, which keeps each year's series self-contained. A single never-resetting sequence is equally valid as long as numbers stay unique.
Padding to a fixed width (0001 instead of 1) keeps invoice numbers the same length, so they sort correctly in spreadsheets and file names.
No. Everything is generated in your browser and nothing is uploaded, so you keep full control of the list you export.