Regex for Indian bank account number
Bank account number — 9 to 18 digits.
The Indian bank account number regex is ^\d{9,18}$ — copy it below, or open it in the explainer for a token-by-token breakdown.
The pattern
^\d{9,18}$
What it matches
12345678912345678901234987654321098765432
What it doesn't match
123456781234567890123456789ABC123456
Notes & gotchas
Indian bank account numbers vary by bank: SBI uses 11 digits, HDFC 14, ICICI 12, PNB 16, etc. Range of 9–18 covers all major banks. Always verify against bank-specific format if you know the bank.
Code in your language
Use the explainer's Code tab to generate ready-to-paste snippets in JavaScript, Python, Java, .NET, Go, Ruby, and PHP for this pattern.
Open in explainer →Token-by-token breakdown
Every part of the pattern, left to right:
| Token | Meaning |
|---|---|
^ | start of string (or line in multiline mode) |
\d{9,18} | between 9 and 18 times: digit (0–9) |
$ | end of string (or line in multiline mode) |
About this pattern
India-specific identifiers are governed by various authorities (UIDAI for Aadhaar, Income Tax Dept for PAN, RBI for IFSC, GSTN for GSTIN, etc.). Regex confirms format; for definitive validation, integrate with the issuing authority's verification API.
Quick usage in different languages
This exact pattern — with the correct escaping and idioms for each language:
- JavaScript:
/^\d{9,18}$/.test(value) - Python:
re.match(r"^\d{9,18}$", value) - Java:
Pattern.compile("^\\d{9,18}$").matcher(value).matches() - C# / .NET:
Regex.IsMatch(value, @"^\d{9,18}$") - Go:
regexp.MustCompile(`^\d{9,18}$`).MatchString(value) - Ruby:
/^\d{9,18}$/.match?(value) - PHP:
preg_match('~^\d{9,18}$~', $value)
The explainer’s Code tab regenerates these for any pattern you paste, and the downloadable cheat sheet bundles the breakdown, all seven snippets, and the pitfalls below onto one printable page.
Common pitfalls
- Anchored to the whole string. This pattern uses ^ and $, so it requires the entire input to match. To find it inside a longer text, drop the anchors and use the global (g) flag.
- Escape it correctly per language. In Java and JavaScript strings each backslash must be doubled (\\d); in Python, Go, and C# use raw/verbatim strings so the backslashes survive.
- Validate beyond format. Matching the format doesn't guarantee the value is real. Confirm the indian bank account number against a source of truth (database, API, or checksum) where it matters.
Related patterns
More patterns in the India 🇮🇳 category:
See also
Browse all 300 patterns in the library, or open this regex in the interactive explainer for a token-by-token breakdown, live testing, and code in seven languages.
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