EIR vs. flat rate in Singapore: how to compare the true cost
Nima Karimi
March 18th, 2026
Table of contents
- Use EIR (Effective Interest Rate) to compare the real yearly cost across offers.
- Flat/advertised rates can look low, but total cost can be higher once repayment mechanics and fees are accounted for.
- In our example, 1.00% flat with a 3% fee costs $1,000 over 24 months, against $592 for 1.48% flat with no fee.
- Best practice: compare EIR and total payable amount for the same loan amount and repayment period.
What is EIR (plain English)?
EIR is the “true cost per year” of a loan, expressed as a percentage. It better reflects how interest is paid down over time and can incorporate fee effects, so it’s more comparable than a headline rate.
Why EIR is usually higher than flat/advertised rates
A flat rate is often calculated on the original principal, even though your outstanding balance reduces each month. EIR reflects the effective cost when repayments reduce the balance over time.
The comparison checklist
When comparing 2 offers, keep the loan amount and repayment period the same, then check:
1) EIR (or APR, if provided)
2) Processing/admin fees
3) Total payable amount (principal + interest + fees)
4) Early repayment/redemption charges (if you might clear early)
5) Late fees and any contract variation fees (tenure/date change)
Worked example (hypothetical offers)
Assume a $20,000 loan over 24 months.
Offer C: lower rate, higher fee | Offer D: higher rate, no fee | |
|---|---|---|
Flat rate | 1.00% | 1.48% |
Processing fee | 3% ($600) | None |
Monthly instalment | $850 | $858 |
Interest plus fee | $1,000 | $592 |
EIR | 4.98% | 2.85% |
Offer D costs $408 less despite the higher headline rate. The “winner” is not the prettiest headline – it’s the lower total payable amount at the same repayment period.
Is this loan cheap? Three checks
1. EIR against what banks publish. Bank-published EIRs we checked on 7 October 2026 started at 1.75% (Standard Chartered CashOne, a promotion), 1.93% (UOB) and 3.22% (DBS, including its 1% fee). An EIR well above these is expensive, although a personalised rate can sit above a published starting rate.
2. Fees. Check processing, annual, late and early repayment fees. A 3% fee turns a 1.00% flat rate into an EIR near 5% over 24 months.
3. Total payable at the same tenure. Add principal, interest and fees, and compare offers over the same number of months.
How to do a “clean compare” in 3 steps
1) Decide your maximum monthly repayment
2) Shortlist offers based on EIR + fees (not headline)
3) Compare total payable amount over the same tenure
Next step
Want personalised offers you can compare side-by-side? Go here: Compare personal loans
Want understanding of personal loan eligibility, documents and repayments? Go here: Personal loans in Singapore
Frequently asked questions about EIR and flat rates
What is the difference between flat rate and EIR?
A flat rate is charged on the original loan amount for the whole tenure. EIR is the true yearly cost on the balance you still owe, including fees, so it is almost always higher than the flat rate.
Which should I use to compare loans?
Use EIR first, then check total payable over the same tenure.
Can a lower flat rate cost more?
Yes. In the example above, a 1.00% flat rate with a 3% fee costs $1,000 over 24 months, while a 1.48% flat rate with no fee costs $592.
What is a good EIR for a personal loan in Singapore?
Bank-published EIRs we checked on 7 October 2026 ran from 1.75% to 3.22%. Your personalised rate depends on your profile.
Sources
MoneySense (EIR vs flat rate)
Bank-published rates, checked 7 October 2026: Standard Chartered CashOne, UOB Personal Loan, DBS Personal Loan
Last updated: 9 October 2026.
Nima Karimi
Nima, the founder and CEO of Lendela, is an experienced entrepreneur who has successfully built and grown businesses in the Nordics and APAC. With a vision to revolutionize the lending industry through fair and transparent loan products, he founded Lendela as the first consumer-centric lending platform in Asia.
