Singapore Bank Account Number Regex for Python

What this pattern does

This page provides a well-structured, multi-part regular expression for matching singapore bank account number, ported and verified for Python. 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 Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

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

import re

singapore_bank_account_number_pattern = re.compile(r'^(?:[0-9]{3}-[0-9]{6}-[0-9]|[0-9]{7,13})$')

def validate_singapore_bank_account_number(value: str) -> bool:
    return bool(singapore_bank_account_number_pattern.fullmatch(value))

# Example
print(validate_singapore_bank_account_number("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 Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. 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.