Korea Mortgage DSR Calculation Guide 2026 — Maximum Loan Amount Under Updated Regulations
A practical guide to Korea Mortgage DSR Calculation Guide 2026 — Maximum Loan Amount Under Updated Regulations, with a clear checklist, key risks to watch, and next steps for readers who want to compare options before acting.
What Is DSR and Why Does It Matter? DSR is one of the main standards Korean banks use when reviewing mortgage applications. It measures your total yearly debt payments (principal + interest on all loans) as a percentage of your annual income. **DSR formula:** DSR (%) = (Annual repayments on all loans / Annual income) × 100 If your DSR is above the regulatory limit, the bank can reject your loan application even if your credit score is strong or the property has sufficient value.
2026 DSR Regulatory Limits As of 2026, Korean financial regulators apply tiered DSR limits depending on loan size and borrower type: | Loan Category | DSR Limit |
|--------------|----------|
| Loans under 100 million KRW | 50% |
| Loans 100–300 million KRW | 40% |
| Loans over 300 million KRW | 40% (stricter bank-level limits may apply) |
| First-time homebuyer programs | Up to 60% (special exception) |
| Financial vulnerability households | Exemption available | **Important change from 2025:** Some regions previously classified as "regulated areas" have been reclassified, allowing slightly higher LTV (Loan-to-Value) ratios and improving practical borrowing capacity for buyers in those locations.
Step-by-Step DSR Calculation
Step 1: Calculate Annual Income DSR is based on "recognized income," which may differ from your total gross income. Banks typically verify it as follows:
Salary income: Full amount recognized
Self-employment income: 2-year average from tax returns
Rental income: 70% recognized
Dividend and investment income: Generally not recognized unless consistent over 2+ years **Example:** Annual salary of 60,000,000 KRW → Recognized annual income: 60,000,000 KRW
Step 2: Calculate Existing Annual Debt Repayments Include all current loans:
Car loan: Monthly 500,000 × 12 = 6,000,000 KRW/year
Personal loan: Monthly 300,000 × 12 = 3,600,000 KRW/year
Credit card revolving balance: Treated as a 1-year installment **Example:** Existing annual repayments: 9,600,000 KRW
Step 3: Determine Maximum Allowable Mortgage Payment With a 40% DSR limit and annual income of 60,000,000 KRW:
Maximum annual repayments (all loans): 60,000,000 × 0.40 = 24,000,000 KRW
Existing repayments: 9,600,000 KRW
Available for mortgage: 24,000,000 − 9,600,000 = **14,400,000 KRW/year = 1,200,000 KRW/month**
Step 4: Calculate Maximum Loan Amount A mortgage payment of 1,200,000 KRW/month supports different loan amounts depending on the interest rate and repayment term: | Interest Rate | 30-Year Term | 40-Year Term |
|--------------|-------------|-------------|
| 3.5% | ~244,000,000 KRW | ~295,000,000 KRW |
| 4.0% | ~232,000,000 KRW | ~277,000,000 KRW |
| 4.5% | ~221,000,000 KRW | ~262,000,000 KRW | At 4.0% interest over a 30-year term, this household would qualify for about **232,000,000 KRW** in mortgage financing.
DSR Calculation Example: Full Scenario | Variable | Value |
|---------|-------|
| Annual salary | 60,000,000 KRW |
| Existing car loan monthly payment | 500,000 KRW |
| Existing personal loan monthly payment | 300,000 KRW |
| Applied DSR limit | 40% |
| Mortgage interest rate | 4.0% |
| Mortgage term | 30 years |
| **Maximum mortgage** | **~232,000,000 KRW** | **After down payment:** If the property costs 550,000,000 KRW, you would need a down payment of at least 318,000,000 KRW.
Strategies to Increase Your Borrowing Capacity
1. Pay Off High-Balance Loans Before Applying
Paying down existing debt reduces your annual repayment burden, leaving more DSR room for the mortgage.
2. Increase Recognized Income
If you have income from sources that banks do not fully recognize, such as investments or freelance work, formalizing part of that income through business registration, tax reporting, or dividend declarations may increase your recognized income base.
3. Choose a Longer Loan Term
A 40-year mortgage has lower monthly payments than a 30-year loan at the same rate, which can support a larger principal within the same DSR limit.
4. Apply Under First-Time Homebuyer Programs
Korea's Bogeumjari Loan and similar first-time buyer programs may allow DSR of up to 60% instead of 40%, meaning eligible borrowers can often qualify for a larger mortgage.
5. Use the DSR Calculator
The MillionsCode Deposit Interest Calculator and similar tools can help you compare how different loan amounts, interest rates, and terms affect your monthly payment and DSR.