How Much of Your Income Should Really Go to Debt?

A band table for net income

The figures below are illustrative, expressed as total debt service against net income. They are a frame for reading your own numbers, not a rule.

• Comfortable, under 20 percent. Debt is a minor line. Your cashflow absorbs an unexpected bill or a slow month without you rearranging anything.
• Workable, 20 to 28 percent. Debt is present but not steering. You can still save and still flex when something irregular hits.
• Stretched, 28 to 36 percent. A meaningful slice of every paycheck is committed before you spend on anything. Saving slows. A single disruption forces a hard choice.
• At risk, above 36 percent. Debt service is shaping the month. Margin for shocks is thin, and new borrowing tends to backfill old borrowing rather than fund anything new.

These bands are wider than a single magic number on purpose. Someone with low fixed costs can sit at 32 percent comfortably. Someone with high rent and a long commute can feel cornered at 24 percent. The ratio tells you the shape of the pressure; your other commitments tell you how much of it you can carry.

Why housing and consumer debt must be counted together

A common mistake is to track the mortgage in one mental column and the car loan, the phone instalment, and the credit-card minimum in another. Your bank account does not keep those columns separate. Every one of them leaves on roughly the same dates and reduces the same pool of money.

Counting them together is the only way the ratio means anything. A 25 percent housing ratio looks calm in isolation, but add a 9 percent car loan and a 5 percent revolving balance and you are at 39 percent total, firmly in the at-risk band. The individual pieces each looked reasonable. The sum is what your cashflow has to survive. This is also exactly how a careful lender views you later: they add the lot before deciding what you can repay.

How to calculate yours from a statement

You do not need a budgeting app or a spreadsheet of categories. One month of bank activity is enough.

1. Find your net income, the total that actually arrived: salary, plus any reliable secondary income.
2. List every recurring debt payment that month: housing finance, loan instalments, buy-now-pay-later, and the minimum due on any card or credit line. Count contractual debt service, not general bills like electricity or groceries.
3. Add those payments and divide by net income. Multiply by 100. That percentage is your real DSTI.

The honest part is step two, because debt has a habit of hiding inside ordinary-looking transactions. A statement reading on actual payments is more reliable than memory. This is where VESTELON FLOW fits: upload one statement, no bank login, and FLOW reads your real debt-service share from the payments that actually left your account, free first report. It separates contractual repayment from the rest of your outflow so the ratio reflects what you owe, not what you guessed.

What each band means for resilience and for a future mortgage

Resilience is mostly about distance from 36 percent. The further below it you sit, the more of an income drop, a rate rise, or a one-off expense your cashflow can absorb before something has to give. A household at 18 percent can lose a month of income and still cover its obligations. A household at 38 percent cannot lose anything without borrowing to bridge the gap, which raises the ratio further, which is how debt spirals begin.

It matters again when you apply for a mortgage. The lender will compute your DTI on gross income and add the new housing payment on top of your existing debts. If your current consumer debt already pushes you toward their ceiling, the mortgage they approve shrinks, sometimes sharply. Clearing a car loan or a card balance before you apply can lift your approved amount more than an equivalent rise in salary would. The ratio you manage today is the ratio that decides your options later.

FAQ

Is 40 percent debt to income too high? On net income, 40 percent sits in the at-risk band. It is survivable with very low other costs, but it leaves little room for shocks, and most lenders treat it as a ceiling rather than a target.

Does rent count in a debt to income ratio? Rent is not credit, so strict DTI excludes it. But for judging real cashflow pressure, housing cost belongs in the picture, which is why a net DSTI view that includes housing finance is more honest than gross DTI alone.

Should I use gross or net income to judge my own ratio? Use net for yourself, because net is the money you actually control. Lenders use gross to screen you, but your monthly reality runs on what lands in the account.