What is Mortgage, PITIA & DTI?
A mortgage payment is more than principal and interest. Lenders qualify you on PITIA — Principal, Interest, Taxes, Insurance, and Association (HOA) dues — the full monthly housing cost. This calculator builds up each piece so the number you plan around is the number the lender actually uses.
It also computes your debt-to-income ratios: front-end DTI (housing cost ÷ gross income) and back-end DTI (housing plus all other debts ÷ income). Those two ratios, more than anything else, decide how much home you qualify for.
Formula
PITIA = Principal & Interest + monthly taxes + insurance + HOA. Front-end DTI = PITIA ÷ gross monthly income. Back-end DTI = (PITIA + other monthly debts) ÷ gross monthly income.
How to read it
- Front-end DTI compares PITIA to your gross monthly income — most conventional lenders want it at or below ~28%.
- Back-end DTI adds your other monthly debts (car, cards, student loans); the common ceiling is ~43%, with room higher on some programs.
- Lowering the payment — a bigger down payment, a lower rate, or a longer term — pulls both ratios down and expands what you qualify for.
Frequently asked questions
- What is PITIA?
- PITIA stands for Principal, Interest, Taxes, Insurance, and Association (HOA) dues — the complete monthly cost of owning a home. Lenders qualify you on PITIA, not just principal and interest.
- What DTI do I need to qualify for a mortgage?
- Many conventional loans look for a front-end DTI around 28% or less and a back-end DTI at or below 43%, though FHA and other programs allow higher ratios with compensating factors like reserves or a strong credit score.