Refinance Your Home Loan in Thailand: Step-by-Step Guide

What Is Home Loan Refinancing in Thailand?

Here’s the short version: refinancing your Thai home loan means moving your debt from your current bank to a new one that offers a lower interest rate. The new bank pays off your existing loan and opens a fresh contract with you — ideally with lower monthly payments, a better rate, or both.

Most people start thinking about this when their monthly payments suddenly jump. That usually happens after the promotional interest rate period ends — typically 3 years into the loan. The rate you’ve been paying at 2.xx% suddenly becomes 6-7%, and what used to go toward paying down your principal is now almost entirely interest.

But before you rush to switch banks, there are costs and conditions that need careful consideration. Refinancing isn’t free — and not every situation makes it worthwhile. This guide walks you through every step: when to refinance, real costs you’ll face, how to compare bank offers, and a negotiation technique most people don’t know about.

When Should You Refinance?

Not every rate change justifies refinancing. There are clearly good and bad times to do it.

When Refinancing Makes Sense

• Your promotional rate period just ended — This is the golden window. Most Thai banks offer special rates for the first 2-3 years. After that, the rate jumps to MRR-1% or MRR-0.5%. MRR (Minimum Retail Rate) at Thai commercial banks currently sits at 6.65-7.30%.
• The Bank of Thailand cut the policy rate — When the BOT lowers rates, banks compete aggressively with refinancing promotions. Great time to negotiate.
• You have a lump sum to pay down the principal — Some people refinance while making a large extra payment, reducing both the outstanding balance and future interest.
• You want to switch rate types — Moving from a floating rate (MRR-based) to a fixed rate, or vice versa, depending on where you think interest rates are heading.

When NOT to Refinance

• You’re still in the prepayment penalty period — Usually the first 3-5 years. Breaking this costs 2-3% of the outstanding balance. On a ฿2.5 million loan, that’s ฿50,000-75,000 in penalties alone.
• You only have a few years left — If you’re 5-7 years from paying off the loan, the registration fees and costs may exceed whatever interest you’d save.
• Your credit has deteriorated — Late payments or high existing debt can mean the new bank either rejects you or offers a rate no better than what you already have.

Real Costs of Refinancing

Many people think refinancing is “free” because banks advertise “no fees.” But there are unavoidable costs:

Item	Cost	Notes
Mortgage registration (ค่าจดจำนอง)	1% of loan amount	Legal requirement. ฿3M loan = ฿30,000
Property appraisal	฿1,000-3,000	Some banks waive this
Fire insurance	฿2,000-5,000/year	Must be renewed with the new bank
Stamp duty	0.05% of loan amount	฿3M loan = ฿1,500
MRTA (if purchased)	฿30,000-80,000	Not legally required — see note below

For a ฿3 million loan, total costs without MRTA run approximately ฿35,000-40,000. With MRTA, expect ฿65,000-120,000.

Break-Even Calculation

Before deciding, answer this: “How many months until the savings cover the refinancing costs?”

Break-Even (months) = Total Refinancing Costs ÷ Monthly Savings

Worked Example

Say you have a ฿2.8 million loan, 3 years in, promotional rate just expired, and your rate jumped to 6.8%:

Item	Before Refinancing	After Refinancing
Outstanding balance	฿2,650,000	฿2,650,000
Interest rate	6.8% (MRR-0.5%)	3.2% (new promo, year 1)
Monthly payment	฿19,200	฿13,400
Monthly savings	—	฿5,800

Refinancing costs: Registration ฿26,500 + Appraisal ฿1,500 + Fire insurance ฿3,000 + Stamp duty ฿1,325 = ฿32,325

Break-even = ฿32,325 ÷ ฿5,800 = 5.6 months

Just 6 months to recoup all costs. After that, every month is pure savings. Over the 3-year promotional period: ฿5,800 × 36 months = ฿208,800 saved, minus ฿32,325 costs = net gain of ฿176,475.

Try your own numbers with the Home Loan Calculator.

Comparing Thai Bank Rates

Refinancing rates from early 2026 (rates change frequently — always verify directly with the bank):

Bank	Year 1 Rate	Year 2-3 Rate	MRR	After Promo Ends
GHB (ธอส.)	2.90%	3.50%	6.15%	MRR-1.75%
SCB	2.59% (6 months)	4.29%	6.95%	MRR-1.75%
KBank (กสิกร)	2.99% (year 1)	4.79%	7.30%	MRR-2.00%
Krungthai (KTB)	2.79%	3.99%	6.65%	MRR-1.50%
Krungsri (BAY)	3.09% (year 1)	4.09%	6.80%	MRR-1.75%

How to Read This Table

The number most people overlook is the post-promotional rate. SCB’s 2.59% in year 1 looks cheapest, but years 2-3 jump to 4.29%. Meanwhile, GHB starts at 2.90% but stays at just 3.50% for years 2-3.

3-year average comparison:

• GHB: (2.90 + 3.50 + 3.50) ÷ 3 = 3.30%
• SCB: (2.59 + 4.29 + 4.29) ÷ 3 = 3.72%
• Krungthai: (2.79 + 3.99 + 3.99) ÷ 3 = 3.59%

Step-by-Step Process

The entire process takes roughly 30-60 days from application to completion.

Step 1: Review Your Current Contract

Check your loan agreement for:

• Contract start date (how many years have you been paying?)
• When the prepayment penalty period expires
• Your current interest rate (MRR minus what?)
• Outstanding balance (from your latest statement)

Step 2: Get Quotes from at Least 3 Banks

Don’t apply to just one bank. Get pre-approval from at least 3 to compare real numbers. The bank advertising the lowest headline rate may have hidden conditions — like mandatory MRTA or a credit card sign-up requirement.

Step 3: Prepare Documents

Salaried Employees	Business Owners
3-6 months of pay slips	2 years of financial statements
Employment certificate	Business registration
6-month bank statements	12-month bank statements
ID card copy	ID card copy
House registration copy	VAT reports (ภ.พ.30) if applicable
Current loan contract + statement	Current loan contract + statement

Step 4: Submit Your Application

The new bank will:

1. Run a credit bureau check (no impact if multiple checks within 30 days)
2. Send an appraiser to evaluate your property (1-2 weeks)
3. Make an approval decision (3-7 business days)

Step 5: Sign and Register

Once approved:

1. Sign the new loan agreement
2. Register the new mortgage at the Land Office (the bank arranges this)
3. The new bank transfers funds to pay off your old bank
4. You receive the title deed back from the old bank → it goes to the new bank
5. Start paying your new, lower monthly installment the following month

Negotiating with Your Current Bank

Here’s something most people don’t know: you don’t have to actually switch banks to get a better rate.

Your current bank doesn’t want to lose you. Acquiring a new customer costs them more than retaining an existing one. Many Thai banks have “Retention Rate” programs — special rates offered to customers who threaten to leave. These aren’t advertised publicly.

How to Negotiate

1. Get a pre-approval from another bank first — having real numbers gives you leverage.
2. Call your bank’s home loan department and say you’re planning to refinance to Bank X at Y% rate.
3. Ask about a Retention Rate directly: “Do you have a special rate for customers who are considering refinancing elsewhere?”
4. Compare the retention offer (no switching costs) against the new bank’s offer (including all switching costs).

Roughly 30-40% of people who call to negotiate get a Retention Rate good enough that they don’t need to switch. It costs you 15 minutes on the phone — worth trying before committing to a full refinance.

Common Mistakes

1. Comparing Only Year-1 Rates

A 1.99% first-year rate looks great, but if years 2-3 jump to 5%, the 3-year average is 3.99%. That might be worse than a bank offering a flat 3.0% for all 3 years. Always compare the average rate across the full promotional period.

2. Forgetting to Factor in Switching Costs

Saving ฿2,000/month sounds good, but if switching costs ฿50,000, you need 25 months just to break even. If you’re not planning to stay long, it might not be worth it.

3. Getting Pressured into MRTA

An MRTA policy costing ฿50,000-80,000 can eat up all the interest savings from refinancing. If you already have adequate life insurance, you don’t need duplicate coverage through MRTA.

4. Not Negotiating with Your Current Bank

At least try. A 15-minute phone call might save you ฿30,000 in switching costs and weeks of paperwork.

5. Extending the Loan Term

Some people refinance and extend their repayment period back to 30 years. Monthly payments drop, sure — but total interest paid over the life of the loan increases dramatically.

The bottom line — refinancing a Thai home loan is one of the most powerful ways to save hundreds of thousands of baht. But it only works when the timing is right, the math checks out, and you’ve explored all options — including negotiating with your current bank before switching. Run your own numbers with the Home Loan Calculator and make a decision based on data, not just a flashy promotional rate.