Someone quotes you 4% a month. You do the quick sum in your head: 4% of S$5,000 is S$200; twelve months of that is S$2,400, so the loan costs S$2,400.
That figure is wrong, and it is wrong in your favour. The real interest on that loan is closer to S$1,393. But there is a second charge most people forget entirely, and once you add it back in, the total cost of a S$5,000 loan over 12 months lands at roughly S$1,893.
This article walks through where each of those numbers comes from. You will see the month-by-month breakdown, the fee that sits outside the interest calculation, the legal ceiling on the whole thing, and the four decisions that move the total up or down.
All figures below assume a lender charging the maximum permitted under Singapore law. The rate you are actually quoted depends on the lender’s assessment of your income, your existing loans, and your ability to repay.
The short answer
Borrow S$5,000 over 12 months from a licensed moneylender charging the maximum 4% per month, with the maximum 10% administrative fee, and here is what you pay:
- Monthly instalment: S$532.76
- Total interest over 12 months: S$1,393.13
- Administrative fee: S$500 (one-time)
- Total cost of borrowing: S$1,893.13
- Total you part with: S$6,893.13
The number worth writing down is that last one. Plenty of calculators, including some on lenders’ own websites, show a “total payment” figure that covers only the instalments and lists the administrative fee in a separate box. On this loan, that gap is S$500.
Why the interest rate on its own tells you very little
As of August 2026, licensed moneylenders in Singapore may charge a maximum of 4% per month in interest. That cap applies regardless of your income, and whether the loan is secured or unsecured.
The part that trips people up is what the 4% is charged on.
Reducing balance versus flat rate
Interest is calculated on the principal you still owe, not on the amount you originally borrowed. Each instalment you pay knocks down the outstanding balance, so the following month’s interest is charged on a smaller figure.
In month one, you owe the full S$5,000, so interest is S$200. By month six, you owe S$3,197.66, so interest is S$127.91. By the final month, you owe S$512.27 and the interest is S$20.49.
That is why S$2,400 is the wrong answer. A flat calculation charges every month against the opening balance and ignores the fact that you have been paying the loan down all year.
The full 12-month breakdown
Here is the same loan, month by month, at 4% per month on a reducing balance:
| Month | Opening balance | Interest | Principal repaid | Closing balance |
|---|---|---|---|---|
| 1 | S$5,000.00 | S$200.00 | S$332.76 | S$4,667.24 |
| 2 | S$4,667.24 | S$186.69 | S$346.07 | S$4,321.17 |
| 3 | S$4,321.17 | S$172.85 | S$359.91 | S$3,961.25 |
| 4 | S$3,961.25 | S$158.45 | S$374.31 | S$3,586.94 |
| 5 | S$3,586.94 | S$143.48 | S$389.28 | S$3,197.66 |
| 6 | S$3,197.66 | S$127.91 | S$404.85 | S$2,792.81 |
| 7 | S$2,792.81 | S$111.71 | S$421.05 | S$2,371.76 |
| 8 | S$2,371.76 | S$94.87 | S$437.89 | S$1,933.87 |
| 9 | S$1,933.87 | S$77.35 | S$455.41 | S$1,478.46 |
| 10 | S$1,478.46 | S$59.14 | S$473.62 | S$1,004.84 |
| 11 | S$1,004.84 | S$40.19 | S$492.57 | S$512.27 |
| 12 | S$512.27 | S$20.49 | S$512.27 | S$0.00 |
| Total | S$1,393.13 | S$5,000.00 |
Notice how the split shifts. In month one, S$200 of your S$532.76 goes to interest. By month twelve, only S$20.49 does. The instalment stays the same; what it buys changes completely.
Where the administrative fee fits in
Separately from interest, a licensed moneylender may charge an administrative fee of up to 10% of the principal. As of August 2026, this is a one-time charge, applied when the loan is granted, not a monthly one.
On a S$5,000 loan, the maximum administrative fee is S$500.
It is usually deducted from the amount disbursed, which means you may borrow S$5,000 and receive S$4,500 while still repaying against the full S$5,000. That is worth confirming with any lender before you sign, because it changes how much cash actually reaches you.
Add the fee to the interest, and the cost of a S$5,000 loan over 12 months comes to S$1,893.13.
What changes the cost of a S$5,000 loan
Three variables do most of the work.
The rate you are quoted
4% is the ceiling, not a standard. At a lower monthly rate, the same loan looks quite different:
| Monthly rate | Monthly instalment | Total interest |
|---|---|---|
| 2% | S$472.80 | S$673.58 |
| 3% | S$502.31 | S$1,027.73 |
| 4% | S$532.76 | S$1,393.13 |
The gap between 2% and 4% on this loan is S$719.55. It is the single largest cost variable in the table, which is why the rate is the first thing to ask about and the first thing to get in writing.
The length of the loan
A longer term lowers the monthly instalment and raises the total interest, because the balance sits outstanding for longer. A shorter term does the reverse. Neither is automatically the better choice: an instalment you cannot comfortably meet creates a more expensive problem than a few hundred dollars of extra interest.
Paying late
Two charges can apply if you miss a repayment. A late fee of up to S$60 for each month of late repayment, and late interest of up to 4% per month charged only on the amount that is overdue, not on the balance that is not yet due.
Miss one S$532.76 instalment and you would be looking at roughly S$60 plus S$21.31, so about S$81 added to a loan that was costing you nothing extra the month before.
The limit on how expensive it can get
Singapore law caps the total. Interest, late interest, the administrative fee, and late fees combined can never exceed the principal you borrowed.
On a S$5,000 loan, that ceiling is S$5,000. Our worked example totals S$1,893.13 in charges, comfortably inside it. The cap matters most when a loan runs into difficulty, because it stops charges from compounding indefinitely the way they can with an unlicensed lender.
Four mistakes that make a S$5,000 loan cost more than it should
- Reading the “total payment” box and stopping there. If the calculator lists the administrative fee separately, add it yourself.
- Comparing a monthly rate to a bank’s annual rate. They are different units. Convert one before you compare, or you will reach the wrong conclusion.
- Choosing the longest term available to get the smallest instalment. You pay for that comfort in interest.
- Not asking what lands in your account. The sum you repay against and the sum you receive can differ by the administrative fee.
Frequently asked questions
What is the monthly instalment on a S$5,000 loan over 12 months?
At the maximum 4% per month on a reducing balance, the instalment is S$532.76, repaid twelve times. At 3% it is S$502.31, and at 2% it is S$472.80. The administrative fee is charged separately and is not part of the instalment.
Is the cost of a S$5,000 loan the same at every licensed moneylender?
No. 4% per month and 10% of the principal are legal maximums as of August 2026, not fixed prices. What you are quoted depends on the lender’s assessment of your income, your existing loans, and your repayment ability.
Does the administrative fee get charged every month?
No. It is a one-time charge applied when the loan is granted, capped at 10% of the principal. On S$5,000, that is a maximum of S$500 in total, not per month.
What happens to the cost if I repay early?
On a reducing balance, repaying early means fewer months of interest charged on an outstanding balance, so you pay less interest overall. Ask your lender how early repayment is handled before you sign, as terms differ.
Can the charges on a S$5,000 loan ever exceed S$5,000?
No. Interest, late interest, the administrative fee, and late fees together cannot exceed the principal borrowed. That total cost cap is set in law and applies for the life of the loan.
How do I check that a lender is allowed to charge me these rates?
Only licensed moneylenders are bound by these caps. You can check any lender against the Ministry of Law’s list of licensed moneylenders before you apply.
Before you borrow
A S$5,000 loan over 12 months at the legal maximum costs S$1,893.13, and you repay S$6,893.13 in total. Knowing that number before you apply is worth more than any comparison of headline rates, because it is the figure your budget actually has to absorb.
Run your own numbers before you commit. Take the instalment, put it next to what is left after your rent, bills and existing commitments, and be honest about whether twelve months of it is comfortable rather than just possible.
RM CREDIT PTE. LTD. is a licensed moneylender (Licence No. [145/2025 ]) regulated by the Registry of Moneylenders, Ministry of Law. You can verify any moneylender’s licence on MinLaw’s list of licensed moneylenders before you apply. Borrow only what you need and are confident you can repay on time, as late fees and late interest add up quickly. If you would like the figures for a different amount or term, our loan calculator works on the same reducing-balance method used throughout this article.
