About The Fifth C

Free, accurate Singapore personal finance calculators. No sign-up. No paywalls. No sales pitch.

What Is The Fifth C?

If you grew up in Singapore, you know the 5 Cs: Cash, Car, Credit Card, Condo, Country Club. For decades, these were the unofficial scorecard of success — the benchmarks by which Singaporeans measured themselves and each other. Get all five, and you had made it.

We think there is a better fifth C: Contentment.

Not complacency — contentment. The kind that comes from knowing your numbers, understanding the system you operate in, and making financial decisions that serve your actual life goals rather than inherited expectations. You cannot be content about money if you do not understand how CPF works, what your HDB flat really costs, or how much stamp duty you owe.

That is why we built The Fifth C. We take the official government data — CPF Board rates, HDB transaction records, IRAS stamp duty tables — and turn them into calculators that give you honest, precise answers. No upselling, no vague ranges, no "speak to a consultant." Just the number.

What We Offer

Twelve free calculators covering the financial decisions most Singaporeans face:

Our Data Sources

Every number on The Fifth C comes from official Singapore government sources or published bank rate sheets. We do not estimate, interpolate, or invent figures.

CPF Board

Contribution rates, allocation ratios, OW/AW ceilings, interest rates, and retirement sum figures (BRS/FRS/ERS) are sourced directly from CPF Board official publications and the CPF Act. The 2025 rate changes were announced in Budget 2023 and confirmed by CPF Board circulars.

cpf.gov.sg/employer → CPF Contribution Rates

data.gov.sg — HDB Resale Transactions

HDB resale transaction data comes from the official Singapore government open data portal, dataset d_8b84c4ee58e3cfc0ece0d773c8ca6abc. This dataset contains 232,000+ records of actual resale transactions from January 2017 to present, and is updated by HDB daily on business days.

data.gov.sg → HDB Resale Flat Prices

MAS & IRAS

Stamp duty rates (BSD and ABSD) are sourced from IRAS official stamp duty tables, last updated April 2023. Home loan benchmark rates reference MAS-published SORA and bank-published fixed rate packages from public comparison sites.

iras.gov.sg → Stamp Duty Rates

How Often Is Data Updated?

HDB Resale Prices
Daily automated pull from data.gov.sg on business days
Fixed Deposit Rates
Refreshed regularly from bank websites
CPF Rates and Ceilings
Updated when CPF Board announces changes (typically Budget season)
Stamp Duty Rates
Updated when IRAS announces changes

Our Mission

To help every Singaporean make informed financial decisions without needing a financial advisor for every calculation. The information is out there — we just make it easy to use.

Questions or corrections? Email us at hello@thefifthc.sg. Found a data error? We want to know.