REGEXVAULTv2.0
Finance/Financial Formats
Verified Safe

Financial Year (FY2024 / FY2024-25) Regex for Java

/^FY[0-9]{4}(?:[/-][0-9]{2})?$/i

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching financial year (fy2024 / fy2024-25), ported and verified for Java. 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 Java project — whether you're validating in a Spring Boot controller, a Jakarta EE service, or a standalone utility class.

Java Implementation

Java
// Financial Year (FY2024 / FY2024-25)
// ReDoS-safe | RegexVault — Finance > Financial Formats

import java.util.regex.Pattern;

public class FinancialYearFy2024Fy202425Validator {
    private static final Pattern PATTERN =
        Pattern.compile("^FY[0-9]{4}(?:[/-][0-9]{2})?$");

    public static boolean validate(String input) {
        return PATTERN.matcher(input).matches();
    }

    // Example
    public static void main(String[] args) {
        System.out.println(validate("FY2024")); // true
    }
}

Test Cases

Matches (Valid)
Rejects (Invalid)
FY2024FY24
FY2024-25FY2024-2026
FY2024/252024-25
FY2023-24FY2024-256
fy2024FY2024/2025-26

When to use this pattern

This pattern is drawn from the Finance > Financial Formats category and carries a ReDoS-safe certification. That matters for Java developers because critical in Java applications since the JVM regex engine uses backtracking and is susceptible to ReDoS without careful pattern design. 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

FY2024 means different calendar periods for different companies. Always document the FY start month in your data model.

Technical Notes

Capture group 1: fiscal year start, group 2: end year (short or long form). Straddling years (FY2024-25 = April 2024 to March 2025) are common in UK, India, and Australia.

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