Singapore Bank Account Number Regex for JavaScript

What this pattern does

This page provides a well-structured, multi-part regular expression for matching singapore bank account number, ported and verified for JavaScript. Financial data validation has zero tolerance for false negatives — a missed invalid entry can corrupt downstream calculations. The snippet below is ready to drop into your JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// Singapore Bank Account Number
// ReDoS-safe | RegexVault — Finance > Bank Identifiers

const singaporeBankAccountNumberRegex = /^(?:[0-9]{3}-[0-9]{6}-[0-9]|[0-9]{7,13})$/;

function validateSingaporeBankAccountNumber(input: string): boolean {
  return singaporeBankAccountNumberRegex.test(input);
}

// Example
console.log(validateSingaporeBankAccountNumber("001-123456-0")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Finance > Bank Identifiers category and carries a ReDoS-safe certification. That matters for JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Major Singaporean banks have different formats: DBS 10 digits, OCBC 9-12 digits, UOB 7-10 digits. Remove hyphens before matching. Pair with bank code for unambiguous identification.