Your debt-to-income ratio is one division. Take everything you pay out each month for debt, divide it by your income before tax, and multiply by 100. That is the number a lender looks at first, and this DTI calculator works it out from two fields in a few seconds. Alongside the percentage, it shows how much of your income is left after the debt is paid and how many dollars of room you have against the 36% line most lenders talk about.
Most people arrive here at an awkward moment. A mortgage application is in progress, a landlord is asking for proof of income, or a rate quote came back with a number that needs explaining. In each case you need one figure, and you need to know whether it is good. The tool answers both halves. It grades the ratio across four bands, and it separates the dollars that remain from the dollars you could still add before hitting 36%.
What it does not do is estimate a mortgage. A debt to income ratio calculator cannot tell you what house you can afford, what your monthly payment would be, or how much you could borrow, because none of those follow from a single ratio. The payment depends on the rate, the term, the price, taxes, and insurance. Two of the four questions people ask on the search page below are of exactly that kind, so they get their own honest section further down rather than a misleading answer here.
Understanding how to calculate your debt-to-income ratio is essential when preparing for mortgage underwriting or credit approval. A DTI calculator divides your fixed monthly obligations by your pre-tax gross monthly earnings to determine how much of your income is pre-committed to existing creditors.
When evaluating your ratio, mortgage lenders measure your profile against established benchmark bands. Keeping your monthly liabilities below the 36% threshold recommended by the Consumer Financial Protection Bureau (CFPB) ensures comfortable borrowing headroom. This calculator evaluates your gross earnings against recurring debts to give you instant classification across four standard lender underwriting tiers.
| What it works out | How |
|---|---|
| Your ratio | Monthly debt divided by gross monthly income, times 100 |
| A band label | Four fixed ranges, with the boundary values included in the lower band |
| Income left after debt | In dollars and as a share of income, which can go negative |
| Headroom to 36% | The dollars of debt you could still carry and stay at the CFPB guideline, or the amount over the line when you are past it |
| A plain-language verdict | One sentence describing what that ratio usually means |
| Input bounds | Debt from 0 to 1,000,000,000, income above 0 up to 1,000,000,000 |
How the Ratio Is Calculated
The whole calculation is `monthly debt payments divided by gross monthly income, times 100`. Nothing else enters it. There is no interest rate, no loan term, and no credit score, because a debt to earnings ratio calculator built on any of those would be answering a different question about affordability rather than about your current ratio.
Gross or take-home, and why the tool takes gross
Use gross income, which is your pay before taxes and deductions. That is the figure lenders use, and the one the tool asks for. Take-home pay is lower by definition, so dividing your debts by it produces a higher, less useful number. A salary of $70,000 a year becomes $5,833.33 a month gross, and $5,833.33 is what goes in the second field. Entering the take-home figure instead will quietly overstate your ratio.
One honest caveat. The tool takes gross income, and so do CFPB and VA. USDA does not. Its handbook measures both ratios against repayment income, which can be lower than gross income when some income is excluded. So a figure you get here lines up with a VA or FHA review, and may be slightly optimistic against a USDA one.
What to Enter, and What Counts as Debt
Two fields, and the first one does all the work. Add up every monthly debt payment you actually make: the mortgage or rent, the car loan, each card minimum, the student loan, and any personal loan. Then put that single total in the first box. If you have no debt at all, enter 0, which is a valid and meaningful answer rather than an error.
Second box: gross monthly income. A calculator for debt to income ratio has no way to check your arithmetic, so the ratio is only as honest as the total you typed. Pull the minimums from your actual statements rather than from memory, and be consistent about whether you have included housing. A calculate debt to income ratio calculator run on a total that silently omits your mortgage is measuring something else entirely.
The tool refuses inputs it cannot work with, and the messages are specific. A negative debt total returns "Monthly debt payments cannot be negative." A total above 1,000,000,000 returns "Monthly debt looks too high. Enter an amount up to 1,000,000,000." An income of zero or less returns "Please enter a gross monthly income greater than zero." And an income above the same ceiling returns "Gross monthly income looks too high. Enter an amount up to 1,000,000,000." The calculation runs on the server, so the two numbers you type are sent to be checked and used.
$1,800 Against $6,000
A debt to income ratio calculator is only worth trusting if the numbers came out of the real engine, so here is a full run. Monthly debt of $1,800, gross monthly income of $6,000. The tool returns 30%, rates it Good, reports $4,200.00 a month left after the debt is paid, which is 70% of income, and shows $360.00 of headroom against the 36% line. Change either input and all four numbers move together, because they are all views of the same division.
Here is the same arithmetic as a citable passage.
A debt-to-income ratio divides your total monthly debt payments by your gross monthly income and multiplies the result by 100. The SajiloX DTI calculator applies that formula to two inputs, monthly debt and gross monthly income, and returns two figures beyond the percentage itself: the income still standing after debt is paid, shown in dollars and as a share, and the dollar headroom left before the ratio reaches 36%. On a $6,000 gross monthly income, a 36% ratio leaves $3,840.00, or 64 cents of every dollar earned. That matches the illustration in the Consumer Financial Protection Bureau's "Your Money, Your Goals" toolkit, published in November 2018, which recommends homeowners keep total debts at 36% or less, notes that some lenders will go up to 43% or higher, and includes the home mortgage inside that ratio.
| Monthly debt | Gross monthly income | Ratio | Band | Left after debt | Share left | Headroom to 36% |
|---|---|---|---|---|---|---|
| $0.00 | $6,000.00 | 0% | Good | $6,000.00 | 100% | $2,160.00 |
| $1,800.00 | $6,000.00 | 30% | Good | $4,200.00 | 70% | $360.00 |
| $2,160.00 | $6,000.00 | 36% | Good | $3,840.00 | 64% | $0.00 |
| $2,280.00 | $6,000.00 | 38% | Manageable | $3,720.00 | 62% | $120.00 over the line |
| $2,580.00 | $6,000.00 | 43% | Manageable | $3,420.00 | 57% | $420.00 over the line |
| $3,000.00 | $6,000.00 | 50% | High | $3,000.00 | 50% | $840.00 over the line |
| $3,000.00 | $2,000.00 | 150% | Very High | $-1,000.00 | -50% | $2,280.00 over the line |
Read the columns and the mechanism is plain. Income sits still while the debt total climbs, so the ratio rises and the amount left after debt falls. The last row is the one that catches people out. Debt of $3,000 against $2,000 of income gives 150%, and the tool reports the leftover income as $-1,000.00, because the payments exceed the money arriving. It also swaps in a different sentence for that case, saying the debt payments run $1,000.00 a month more than the income, so there is nothing left over. A ratio that reports a negative balance is not a glitch, it is the arithmetic being honest.
One Number Here, Two Numbers at the Lender
A single blended ratio is what most online tools produce, and this one does the same. It is not the model a mortgage lender uses. Lenders work with a front-end ratio and a back-end ratio, and they judge the application on both.
The front-end ratio, also called the housing ratio or the PITI ratio, divides housing costs alone by income. PITI stands for principal, interest, taxes, and insurance, and homeowners association or condominium fees often join it. The back-end ratio, also called the total ratio, adds every other monthly obligation on top and divides the whole lot by income. HUD describes them directly: the mortgage payment-to-income ratio is the front-end ratio, and the total fixed payment-to-income ratio is the back-end ratio.
What this tool computes matches the back-end idea, provided you include your housing payment in the monthly debt total. It cannot produce the front-end figure and the back-end figure in one run, because it does not ask you to separate housing costs from everything else. To get both, run it twice with the same income. Enter housing costs on their own for the front-end ratio, then add your other monthly debts for the back-end ratio. Dropping the housing payment instead gives you a non-housing debt ratio, which is a third thing and not the front-end number a lender looks at.
This is also why a blended figure can pass one test and fail another. A borrower with a high mortgage payment and almost no other debt can clear the 43% back-end limit while still breaching a 31% front-end cap. Nothing is wrong with either number. They answer different questions, and only the pair tells the whole story.
Reading the Four Bands
The band labels are fixed ranges inside the code, not opinions added at the edges. The boundary value belongs to the lower band, which was checked directly: exactly 36% returns Good, exactly 43% returns Manageable, and exactly 50% returns High. Each was confirmed by running the tool, and each was confirmed to flip on the next cent above.
| Band | Range | What the tool says |
|---|---|---|
| Good | 36% or below | Comfortable. Most lenders want to see a DTI of 36% or below. |
| Manageable | Above 36% to 43% | Workable, but the monthly payments are taking a real share of your income. |
| High | Above 43% to 50% | Stretched. Many lenders will decline above 43%, and your options narrow quickly. |
| Very High | Above 50% | Out of reach for most mortgage lending as it stands. |
Those four sentences are the tool's own, returned with every result. They are a reading aid, not an underwriting decision. FHA allows ratios above 43% in defined situations, VA allows more than 41% with justification, and USDA sets waiver ceilings higher again. The bands describe your ratio. The programs decide what to do about it.
One display quirk is worth naming, because it looks like an error and is not. The band is worked out from the full-precision ratio, while the number on screen is rounded to one decimal place. Between 50.000% and 50.050% the screen can read 50% and still carry the Very High label. On $6,000 of income that window is a monthly debt total of $3,001 to $3,002. The label is describing the real ratio, which really is above 50%.
The Thresholds US Lenders Actually Work From
Now the sourced part, because the online consensus on a good ratio is vaguer than the actual rules. Four US sources set the numbers, and none of them is a universal limit. Every figure below carries its own scope, and reading the scope matters as much as reading the percentage.
| Source and program | What is measured | Figure | Source and date |
|---|---|---|---|
| CFPB homeowner guideline | All debts, home mortgage included | 36% or less | Your Money, Your Goals, Nov 2018 |
| CFPB renter guideline | All debts, rent excluded | 15% to 20% or less | Your Money, Your Goals, Nov 2018 |
| CFPB mortgage-only view | Principal and interest alone | 28% to 35% | Your Money, Your Goals, Nov 2018 |
| FHA, manually underwritten | Front-end housing ratio | 31% | 78 FR 75238, Dec 11, 2013 |
| FHA, manually underwritten | Back-end total ratio | 43% | 78 FR 75238, Dec 11, 2013 |
| FHA, score 580 or above, one compensating factor | Stretch ratios | 37% / 47% | 78 FR 75238, Dec 11, 2013 |
| FHA, score 580 or above, two compensating factors | Stretch ratios | 40% / 50% | 78 FR 75238, Dec 11, 2013 |
| FHA Energy Efficient Mortgage | Stretch ratios | 33% / 45% | 78 FR 75238, Dec 11, 2013 |
| VA | PITI of the loan plus long-term obligations over gross income | 41% or less | 38 CFR 36.4340(d), 2024 edition |
| USDA | Proposed housing expense against repayment income | 29% | HB-1-3555 Ch. 11, rev. Nov 25, 2025 |
| USDA | Total debts against repayment income | 41% | HB-1-3555 Ch. 11, rev. Nov 25, 2025 |
| USDA waiver ceiling | Strong compensating factors, credit score 680 or above | 32% PITI / 44% total debt | HB-1-3555 Ch. 11, rev. Nov 25, 2025 |
The CFPB figures are guidance for consumers, not lender rules. Its toolkit says homeowners should consider keeping a ratio for all debts at 36% or less, that some lenders will go up to 43% or higher, and that the home mortgage is included. For renters it gives a separate guideline of 15% to 20% or less, and states plainly that rent is not included. It also offers a narrower mortgage-only view of 28% to 35%, where the payment counts principal and interest alone.
The FHA figures come from a Federal Register notice published December 11, 2013, and they apply to manually underwritten loans. It sets a 31% front-end cap and a 43% back-end cap, then allows higher ratios with compensating factors such as documented cash reserves. Borrowers with a credit score of 580 or above may reach 37/47 with one compensating factor and 40/50 with two. Homes meeting energy efficiency standards get a 33/45 stretch. The same notice is explicit that FHA's manual standards set no absolute maximum, because the decision belongs to the underwriter.
VA works differently again. Under 38 CFR 36.4340, the ratio sums the PITI of the loan being applied for, along with assessments, association fees, and any long-term obligations, then divides by gross earnings. The regulation sets the standard at 41% or less and allows a loan above that to be approved with justification. VA also requires residual income to be assessed, and failure on one of the two standards does not automatically disqualify a veteran.
USDA measures against repayment income rather than gross income, which is the detail most easily missed. Its handbook chapter revised November 25, 2025 states that applicants have repayment ability if proposed monthly housing expense does not exceed 29% of repayment income, and that they have repayment ability when total debts do not exceed 41%. Total debt is housing expense plus other monthly obligations. Lenders may clear a higher PITI ratio of up to 32% and a total debt ratio of up to 44% when strong compensating factors are present and the validated credit score is 680 or above.
Rent, Student Loans, and Credit Cards
Rent is the detail that trips people up, because the answer changes depending on whose rule you are reading. The tool's field asks for rent or mortgage alongside your other payments, so a renter who types $1,400 of rent gets it counted. The CFPB renter guideline explicitly excludes rent and lands far lower, at 15% to 20% or less. So if you are comparing your result to that guideline, take rent out first. The number the tool gives you with rent included is a homeowner-style total ratio, not the renter one.
A run makes the gap concrete. Take gross monthly income of $4,000 and a $500 monthly debt total, being a car loan and a card, with no rent typed in. The tool returns 12.5%, leaves $3,500.00 a month, or 87.5% of income, and shows $940.00 of headroom to 36%. That 12.5% is what the CFPB renter guideline is meant to be compared against. Now add $1,400 of rent to the same household and the total becomes $1,900, which pushes the ratio to 47.5%. Nothing about the borrower's finances changed. The only change is which definition you applied, and that is exactly why the rent question needs an answer before the number does.
Student loans belong in the total, and so do car loans, card minimums, and personal loans. What a lender counts is every recurring monthly obligation, which is why the tool asks for one combined figure instead of a list. The most common way to get a misleading answer is to total only the credit cards and leave out the student loan, because the loan feels like education rather than debt. It counts.
The fastest way to move the ratio is to attack the numerator. Paying down a card balance with the credit card payoff calculator lowers the total you type in, and a debt consolidation calculator can show what a lower rate on a balance would be worth. If a card minimum looks unfamiliar, the credit card minimum payment calculator shows how that figure is actually built. Raising income helps too, though only lenders decide which income counts.
Two Income Questions Worth Answering Honestly
Half the questions attached to this search are about a specific salary, so here are both, answered as far as the tool allows. The first is what happens at $70,000 a year. That salary is $5,833.33 a month gross. With $1,800 of monthly debt the ratio comes out at 30.9%, rated Good, leaving $4,033.33 a month, or 69.1% of income, with $300.00 of headroom to 36%. That is a comfortable starting point for most borrowers before a mortgage is added.
Now add a realistic homeowner load to the same salary. Mortgage of $1,900, a car loan of $450, and $200 of card payments gives $2,550 of monthly debt. Against $5,833.33 the ratio is 43.7%, rated High, leaving $3,283.33, or 56.3% of income, with headroom showing $450.00 over the line. The same household and salary sit in a different band, and a different band is the part that changes what a lender will do.
The second question asks about $200,000 a year with no debt. That is $16,666.67 a month gross, and with $0 of monthly debt the ratio is 0%, rated Good, with the whole $16,666.67 remaining, 100% of income, and $6,000.00 of headroom to 36%. Zero is a real answer, not a missing value, and a debt-free borrower has an unusually large amount of room before the first new payment.
What neither answer delivers is a house price, and it is worth being direct about why. A monthly payment needs a purchase price, a rate, a term, and an estimate for taxes and insurance. None of those exist yet at this stage of the calculation, so a DTI calculator cannot produce them without inventing four numbers. The useful output here is the ratio and the headroom, and those are what a lender will actually ask you for.
What a Single Ratio Cannot Show
It works from two numbers you type. It does not read your accounts, pull your credit file, or check anything about you, so a wrong total gives a confidently wrong answer. It models no fees, no interest rates, and no change in your income over time, because a ratio is a single snapshot rather than a forecast.
It produces one blended ratio where lenders use two, as covered above, and it cannot separate housing costs from other debts without you running it twice. It uses gross income, so a USDA comparison needs care, since USDA measures against repayment income. It reports the 36% headroom measured against a CFPB guideline, not against a lender's private threshold, and those can be tighter.
It also does not compute a mortgage payment, a loan amount, a home price, or a rent figure. If a lender has quoted you a monthly payment, enter that into the debt field and the tool will tell you the ratio it creates, which is the number you actually need at that point. Anything beyond that belongs to a payment calculator, and the figures this tool produces should be treated as a check on your own arithmetic rather than as a decision from a lender.
Last verified: October 2026. Ratio, band, remaining income, headroom, and refusal figures were reproduced by running the shipped calculator across 23 scenarios. Lender thresholds are read from CFPB Your Money Your Goals (November 2018), 78 FR 75238 (December 11, 2013), 38 CFR 36.4340, and USDA HB-1-3555 Chapter 11 (revised November 25, 2025).