There are a lot of confusing terms to wrap your head around when you apply for a housing loan, and debt-to-income ratio — usually shortened to DTI — is one of the most important. It quietly sits behind almost every approval decision a bank makes, yet it's rarely explained to borrowers. Understanding it can be the difference between getting your dream home approved and being turned away.
What is debt-to-income ratio?
Debt-to-income ratio is the percentage of a borrower's monthly income that a bank is comfortable seeing go toward debt. Think of it as a ceiling: the bank adds up everything you'd owe each month — including the new home loan repayment — and checks that the total stays under a set share of what you earn.
In the Philippines, most banks set that ceiling somewhere between 30% and 40% of your gross monthly income. Stay under it and you're in comfortable territory. Push past it and the bank starts to worry you can't sustainably afford the new loan.
How is DTI calculated?
The maths is simple. Add up your total monthly debt repayments, divide by your gross monthly income, and multiply by 100. Here's a worked example:
- You earn ₱50,000 per month.
- Most banks would want your total monthly debt obligations — your new home loan amortisation plus any existing loans — to stay roughly between ₱15,000 and ₱20,000.
- That works out to a DTI of about 30% to 40%, depending on the bank.
The exact cap depends on the lender. Some banks hold the line at 30%, while others will stretch to 40% or weigh it alongside other factors like your income stability and credit history.
What counts as "debt" in the calculation?
When a bank works out your ratio, it doesn't just look at the home loan you're applying for. It usually counts every recurring obligation, such as:
- The proposed monthly home loan amortisation
- Existing car or auto loans
- Personal and salary loans
- Minimum monthly payments on credit cards
- Other regular financing commitments
That's why two people on the same salary can get very different answers — the one carrying less existing debt has more room under the bank's ceiling.
Why DTI matters so much
Here's the part most borrowers don't realise: your DTI can be the single factor that gets your application declined by one bank but approved by another. Because each bank sets its own threshold, the same person with the same income and the same debts can match one lender's criteria and fall just outside another's.
A lower ratio tells the bank you can comfortably manage the new repayment, which strengthens your application and may unlock a larger loan or a sharper rate. A higher ratio signals you're already stretched, so the bank may shrink the amount it's willing to lend — or say no altogether.
The catch: banks don't advertise their DTI
You'd think you could just look up each bank's limit and apply to the right one. Unfortunately, banks don't outline every part of their decision-making process — and for good reason. Home loans are complicated, and the debt-to-income ratio is only one piece of a much larger assessment. It's simply not something lenders publish.
So on your own, the only sure way to find out whether you meet a bank's DTI is to go through the entire application process and wait for that bank to come back to you. If they decline you, you start again with the next bank. That's slow, stressful, and discouraging.
Not sure if you'd pass the bank's DTI?
Chat with a Nook loan consultant and we'll work out which banks you match in minutes — then we handle the whole application for you. 100% free.
Chat to an agent →There's a faster way — and it's free
Instead of guessing your way through one bank at a time, this is exactly what a mortgage broker like Nook does for you. When you chat with us, a dedicated loan consultant can work out whether you meet each partner bank's debt-to-income criteria — usually in a matter of minutes — and tell you which lenders you qualify with.
From there, Nook compares 20+ banks, matches you to the lender most likely to approve you, and then runs the entire application on your behalf. You don't fill in bank forms, queue at branches, or chase follow-ups — we do all of it, so you can stay home while your loan moves forward.
Best of all, it costs you nothing. Nook is the Philippines' original and award-winning mortgage broker, and the service is 100% free to you because the bank pays us a commission only once your home loan is released. Knowing your debt-to-income ratio is one part of the puzzle — letting Nook handle the rest is how you actually get into your home.