Debt Consolidation Calculator (VND)
If you live and work in Vietnam, debt can pile up across several products at once — a credit card carried month to month, a consumer-finance instalment plan, an unsecured personal loan — each with its own rate and due date. Debt consolidation means taking out one new loan large enough to clear all of them, leaving you with a single monthly payment at a single rate. When that new rate is meaningfully lower than the blended rate you are paying now, you simplify your finances and pay less interest.
This calculator puts two scenarios side by side, all amounts in Vietnamese dong. The current scenario asks for your total outstanding balance, your blended APR and the total you pay across all debts each month; it then works out how many months until you are debt-free and how much interest that path costs. The consolidation scenario takes the same total balance, applies a new APR over a fixed number of months, and returns the level monthly payment and the new total interest. Three metric cards summarise the new monthly payment, the interest you save and how your payoff time changes.
A worked example makes it concrete: 150.000.000 VND of debt, paid down at 5.000.000 VND/month at an illustrative 22% blended APR, takes roughly 44.0 months and 69.765.051 VND in interest to clear. Consolidate into a single 14% loan over 36 months and the interest drops to 34.559.201 VND — a saving of about 35.205.850 VND, for an almost unchanged monthly payment. One caveat applies throughout: every rate on this page is an illustrative assumption, not a quote. Real Vietnamese lending rates vary by institution and by borrower profile — always use the numbers you are actually offered.
How the calculator works
1. Current scenario — how long until you are debt-free?
For a balance P at monthly rate r, paying a fixed amount (pmt) each month, the number of months left is:
n = −ln(1 − P·r / pmt) / ln(1 + r)
| Symbol | Meaning |
|---|---|
| P | Total current balance |
| r | Monthly rate = annual APR ÷ 12 (22%/year → 1.8333%/month) |
| pmt | The amount you currently pay each month |
| n | Months remaining to clear the balance |
Total interest on this path = pmt × n − P. The critical condition: if your monthly payment is less than or equal to the interest accruing that month (pmt ≤ P·r), the balance never falls — the classic credit-card "minimum payment" trap. The tool flags this case.
2. Consolidation scenario — the level monthly payment
The new loan amortises with equal payments using the annuity formula:
PMT = P·r / (1 − (1 + r)^−n)
where r is the new loan's monthly rate (14%/year → 1.1667%/month) and n is the new term in months. Total interest = PMT × n − P. Every figure in the table below comes straight from these two formulas, so you can reproduce them in a spreadsheet.
3. When does consolidation actually pay off?
- The new rate is below your current blended rate — the core requirement for saving interest.
- You do not over-extend the term. A lower rate spread over many more years can still cost more total interest. Watch the total interest figure, not just the monthly payment.
- Fees are accounted for. Arrangement fees, early-settlement fees on the old debts, and loan insurance all matter. This tool does not model fees, so add them when you compare real offers.
What the model leaves out
The calculator assumes a constant rate over the whole term, collapses all debts into one blended figure, and ignores fees, taxes and prepayment penalties. Your real blended rate may differ if the debts vary widely in size and rate. Treat the result as a comparison scenario, not a commitment.
Worked example: consolidating 150.000.000 VND
Illustrative assumptions: a total balance of 150.000.000 VND, currently paid at 5.000.000 VND/month at a blended 22%/year APR; the consolidation option is a single 14%/year loan over 36 months. All rates are assumptions, not quotes.
| Metric | Keep current (pay 5.000.000/month) | Consolidate (14%, 36 months) |
|---|---|---|
| Annual APR | 22% | 14% |
| Monthly payment | 5.000.000 | 5.126.644 |
| Months to clear | 44.0 (≈ 44) | 36 |
| Total interest | 69.765.051 | 34.559.201 |
| Total repaid (principal + interest) | 219.765.051 | 184.559.201 |
Three things stand out:
- You save roughly 35.205.850 VND in interest. Total interest falls from 69.765.051 VND to 34.559.201 VND, almost entirely because the blended rate drops from 22% to 14%.
- You are debt-free about 8 months sooner — 36 months instead of 44.0 — even though the monthly payment barely moves.
- The monthly payment changes by only 126.644 VND (5.126.644 vs 5.000.000). You finish earlier and pay less interest while your monthly budget stays essentially the same.
The counter-warning: if you stretch the consolidation term to 60 months to shrink the monthly payment, the total interest can climb back up. Test a longer term in the tool and compare the total interest cell before deciding. FiMo also has a debt planner and a credit-card payoff calculator if you want to attack the debts in priority order instead.
Frequently asked questions
What is debt consolidation?
Debt consolidation means taking one new loan large enough to clear several existing debts — credit cards, consumer-finance instalments, personal loans — so you are left with a single monthly payment at one rate. The main benefits are simplicity and, when the new rate is below your old blended rate, lower interest. In the illustrative example, consolidating 150.000.000 VND from 22% down to 14%/year saves about 35.205.850 VND of interest.
How much interest can debt consolidation save?
It depends on the rate gap and the term. With the illustrative assumptions: 150.000.000 VND paid at 5.000.000 VND/month at 22%/year costs 69.765.051 VND in interest; consolidating into a 14%/year loan over 36 months cuts that to 34.559.201 VND — a saving of about 35.205.850 VND. Enter the rate you are actually offered to get a figure that reflects your situation.
What is the formula for the consolidation loan payment?
An amortising loan uses the annuity formula: PMT = P·r / (1 − (1 + r)^−n), where P is the amount borrowed, r the monthly rate (annual APR ÷ 12) and n the number of months. Verifiable example: P = 150.000.000, r = 14%/year ÷ 12, n = 36 → PMT ≈ 5.126.644 VND/month. The months to clear your current debt come from n = −ln(1 − P·r/pmt) / ln(1 + r).
When should I NOT consolidate my debt?
Avoid it when: (1) the new loan's rate is not lower than your current blended rate; (2) you stretch the term so far that total interest rises even though the monthly payment falls; (3) arrangement fees, early-settlement charges and loan insurance eat up the saving; or (4) the real problem is spending habits — consolidating and then running the cards back up leaves you with more debt than before. Always compare the total interest cell, not just the monthly payment.
What is the credit-card minimum-payment trap?
If the amount you pay each month is less than or equal to the interest accruing that month (pmt ≤ P × monthly rate), the balance never falls — you pay forever without reducing the principal. That is why minimum credit-card payments can drag on for years. The calculator flags this case. The way out is to raise the monthly payment or consolidate into a lower-rate loan with a fixed amortising schedule.
Are the rates in these examples real bank rates?
No. The 22% and 14%/year used throughout this page are illustrative assumptions chosen to make the formulas easy to follow and verify. Actual Vietnamese lending rates differ by institution, product and borrower profile, and change over time. Enter the rate you are actually offered (and your real current blended rate) into the tool — the formulas behave identically at any rate.
How is consolidation different from refinancing?
Consolidation rolls several separate debts into one loan to simplify repayment and lower the blended rate. Refinancing usually replaces one existing loan (a mortgage, say) with a new one on better terms. Both aim to cut the rate or change the term, but consolidation emphasises combining multiple balances into a single obligation. This calculator models the consolidation case.