How to Use a Housing Loan Calculator in the Philippines

Whether you're buying your first home in Quezon City or refinancing a condo in BGC, a housing loan calculator is your most important planning tool. It tells you exactly how much your monthly amortization will be — and more importantly, whether you can realistically afford the loan you're considering.

In this guide, we'll walk you through how Philippine bank loan calculators work, how to estimate loan eligibility based on your salary, and how to compare BDO, BPI, Pag-IBIG, Metrobank, and other major lenders side by side. We'll also show you real numbers so you can make a smarter, faster decision.

The Basic Formula Behind Every Housing Loan Calculator

Every housing loan calculator uses the same underlying math: the standard amortization formula. Your monthly payment depends on three variables:

The formula is: M = P × [r(1+r)^n] ÷ [(1+r)^n − 1]

That looks complex, but in practice it means this: for every 1,000,000 pesos you borrow at 7% per year over 20 years, you'll pay approximately 7,753 pesos per month. At 5.99%, that same loan costs about 7,165 pesos per month — a difference of 588 pesos per month, or 7,056 pesos per year.

Sample Monthly Payments by Loan Amount and Interest Rate

The table below shows estimated monthly amortizations for common loan amounts in the Philippines, across a range of interest rates, on a 20-year term. These figures assume a fixed interest rate for the full term.

Loan Amount: 2,000,000 pesos (20-year term)

Loan Amount: 4,000,000 pesos (20-year term)

Loan Amount: 6,000,000 pesos (20-year term)

If your current loan is at 8% or higher, the gap is significant. A 6,000,000-peso loan at 8% versus 5.99% costs you over 7,197 pesos more every single month. That's 86,364 pesos extra per year — money that could be funding your child's education or your retirement.

Curious what you'd save specifically on your existing loan? Try the home loan refinance calculator to get a personalized savings estimate in minutes.

How Much Housing Loan Can You Get Based on Your Salary?

Philippine banks follow a universal rule: your total monthly loan obligations must not exceed 30% to 35% of your gross monthly income. This is called the Debt Service Ratio (DSR) or Total Debt Ratio (TDR), and it's the single most important factor in determining how much you can borrow.

Monthly Salary vs. Maximum Loan Estimate

The estimates below assume a 20-year loan term at 7% interest and no other existing debt obligations:

Important: if you already have a car loan, credit card balance, or other existing obligations, banks will deduct those from your available DSR capacity. A borrower earning 100,000 per month with an existing car loan of 15,000 per month effectively has capacity only for a housing loan payment of 20,000 per month, reducing the maximum loan to around 2,576,000 pesos.

If you're earning a combined household income (e.g., co-borrowing with a spouse), banks will typically allow you to combine salaries, significantly increasing your borrowing capacity.

Comparing Philippine Banks: Typical Housing Loan Rates in 2026

Rates vary across banks and are usually fixed for the first 1, 3, 5, or 10 years, then repriced based on prevailing market rates. Here's a general picture of where major Philippine lenders typically sit:

Bank Housing Loan Overview

The critical thing to understand is that advertised rates are starting points, not guaranteed rates. The rate you actually receive depends on your credit profile, employment type, loan-to-value ratio, and the property type. This is exactly why using a mortgage broker like Nook can save you significant time and money — instead of applying to five banks separately, Nook submits your application to multiple lenders simultaneously and presents you with the best offer.

To understand what's happening broadly with rates right now, see our full breakdown of home loan interest rates in the Philippines for 2026.

Fixed vs. Variable Rate: What the Calculator Doesn't Tell You

Most housing loan calculators show you a monthly payment based on a single interest rate — but Philippine home loans don't actually work that way. Almost all bank loans have a repricing clause.

Here's what that means in practice:

Example: You borrow 5,000,000 pesos at 6.75% fixed for 5 years on a 20-year term. Your payment for years 1–5 is approximately 37,847 per month. In year 6, the bank reprices your loan to 9.00%. Your remaining balance is approximately 4,290,000 pesos, and your new monthly payment becomes approximately 38,617 per month — a jump of 770 pesos monthly. If rates had risen to 10.5%, the payment would be around 42,500 per month.

This repricing risk is one of the most important reasons Filipino homeowners refinance their loans. If you locked in at a high rate years ago — or if your loan is about to be repriced upward — refinancing to 5.99% now could lock in a lower rate before conditions change.

Pag-IBIG vs. Bank Loan: Which Is Cheaper?

Pag-IBIG (HDMF) is often assumed to be the cheapest option, but this isn't always true — especially for larger loan amounts.

Pag-IBIG's multi-tier rate structure means:

For a 4,000,000-peso loan, Pag-IBIG's rate is around 10.0% — higher than most bank rates. The monthly payment at 10% over 20 years is approximately 38,600 pesos. At a bank rate of 6.75%, the same loan costs 30,278 per month — a saving of 8,322 pesos per month, or 99,864 pesos per year.

The right choice depends entirely on your loan size, your Pag-IBIG contribution history, and what bank rates you qualify for. Nook helps you compare both and find the lowest actual rate.

What If You Already Have a Home Loan?

If you already own a home and are currently servicing a loan — especially one taken out more than 3 years ago — there's a very good chance you're paying more than you need to. Most existing borrowers are on rates between 7% and 10%, and many took out loans when rates were even higher.

Refinancing means transferring your remaining loan balance to a new lender at a lower rate. The math is simple: lower rate equals lower monthly payment equals more cash in your pocket every month.

For a borrower with 3,500,000 pesos remaining on their loan at 8.5% versus refinancing to 5.99% (both on 15-year remaining terms), the monthly savings are approximately 4,820 pesos. Over the remaining life of the loan, that's total savings of 867,600 pesos.

Refinancing does involve some costs — transfer taxes, notarial fees, appraisal fees, and bank processing fees. But these typically total 1% to 2% of the loan amount and are recovered within 12 to 24 months of lower payments. After that, every month is pure savings.

Key Factors That Affect Your Housing Loan Application

Beyond salary and loan amount, Philippine banks evaluate several additional factors:

How Nook Makes the Process Easier

Using individual bank calculators gives you a rough estimate, but it doesn't tell you which bank will actually approve your loan — or at what rate. That's where Nook comes in.

Nook is the Philippines' first digital mortgage broker. Here's how the process works:

The service is completely free to borrowers. Nook is compensated by the lending bank only when your loan is successfully approved and released — so there's no cost to you regardless of the outcome.

The best refinance rate currently available through Nook is 5.99% per annum. For most Filipino homeowners currently paying 7% to 10%, that's a meaningful and immediate improvement to monthly cash flow.