It's the share of your monthly income that's already committed to debt payments before you do anything else. Lenders look at it to judge whether you can take on more. You should look at it because it tells you how much of your own work is already spoken for.
How It Is Put Together
Add up the required monthly payments on your debts and compare that to your monthly income before taxes. That comparison is the ratio.
It counts what you're obligated to pay, not what you choose to pay. Paying extra is good for you and doesn't change the ratio.
Why Lenders Care
It's a capacity test. Income alone doesn't tell them whether you can handle another payment; income net of existing obligations gets closer.
Each lender sets its own thresholds and they differ by loan type, so there's no universal pass mark worth quoting.
Why It Matters Even If You Are Not Borrowing
A high ratio means most of your month is already sold before you start it. That's the real cost — not the lender's opinion, but how little room you have when something goes wrong.
For ranch and business borrowing, how your income gets counted can be genuinely complicated. Your CPA and your lender should both be in that conversation.
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