Debt to Income Ratio Calculator (2024)

Understanding Debt to Income Ratio

The Debt to Income (DTI) Ratio is a critical financial measure, especially in the context of mortgage applications. It compares your total recurring monthly debt repayments to your monthly gross income, serving as a key indicator of your financial health. This ratio helps mortgage lenders assess your ability to manage and repay debts. For borrowers, understanding your DTI ratio is vital for making informed financial decisions, as it influences mortgage eligibility and terms. A lower DTI ratio is generally favourable, indicating a healthier balance between debt and income.

Mortgage Lenders’ Affordability Assessment

In assessing mortgage applications, mortgage lenders use the Debt to Income (DTI) Ratio to gauge a borrower’s financial stability. This ratio, comparing monthly debt repayments to gross income, helps determine how much debt a borrower can comfortably handle. A lower DTI suggests a better balance between debt and income, influencing the mortgage lender’s decision on loan approval and terms.

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What Counts as Debt?

Understanding what is considered debt is crucial for an accurate DTI calculation.

Housing Costs

For your mortgage application, calculate using the monthly repayment of the mortgage you’re considering. Even if you’re currently renting or selling your home, use the expected mortgage payment for your new home. Unsure of this amount? Our mortgage repayment calculator can provide a close estimate, helping you accurately assess this significant part of your financial commitment.

Credit Card Bills

When calculating credit card debt, a more accurate approach is to use 1.5 times your monthly minimum payment. This method offers a clearer picture of your commitment to debt reduction, as minimum payments alone may not reflect your actual payment behaviour or the speed at which you’re reducing the principal amount.

Vehicle Finance

Include the total monthly payments for any car finance or lease agreements in your DTI calculation. It’s important to note, however, that related expenses such as insurance, road tax, and fuel costs are not included in this calculation. Only the repayment or lease amount itself should be considered as part of your monthly debt obligations.

Personal Loans

Add the monthly repayment amounts of any unsecured personal loans you have. These could be loans from banks, credit unions, or other financial institutions. Ensure that you include all such debts, as they play a significant role in your overall financial picture and are critical to the DTI calculation.


If you regularly use an overdraft facility, include a monthly amount that accounts for the interest and fees incurred, as well as a portion of the overdraft balance. This helps in presenting a more accurate picture of your financial obligations, especially if the overdraft is a consistent part of your financial management. Learn more here: Does having an overdraft affect getting a mortgage?

Student Loans

Student loan repayments should be included in your DTI calculation. These are considered long-term recurring monthly debt and can significantly impact your monthly budget. Ensure that you include the actual monthly payment amount, whether it’s a fixed sum or varies based on your income. Learn more here: Does student loan affect mortgage applications?

Regular Maintenance or Financial Support Payments

Include any regular financial support payments, such as child support or alimony. If the amount varies from month to month, calculate an average based on recent payments. This ensures that your DTI ratio accurately reflects your ongoing financial responsibilities.

Debt Management Payments

If you’re making payments towards a debt management plan, whether it’s a formal arrangement or an informal agreement, include these payments in your DTI calculation. These payments are crucial in understanding your current financial commitments and ability to take on new debt.

Other Debts

This category encompasses a variety of other debts, such as repayments to HM Revenue & Customs (HMRC), benefit overpayments, or informal loans from family or friends. While these may not be traditional loans, they are financial obligations that affect your overall debt burden and should be included in your DTI calculation.

What Doesn’t Count as Debt?

When calculating your Debt to Income Ratios, it’s important to understand that not all monthly expenses are classified as debt. Certain expenses are considered part of your daily living costs and do not contribute to your DTI calculation. These include:

  • Regular utility bills (electricity, gas, water)

  • Mobile phone contracts

  • Subscription services (Netflix, Spotify, Amazon Prime)

  • Internet and cable services

  • Food shopping expenses

  • Transportation costs (public transport fares, fuel for personal vehicles)

  • Health insurance premiums

  • Gym memberships

  • Dining out and entertainment expenses

These non-debt expenses, while essential for your daily life, are not factored into the DTI ratio as they are not considered financial obligations or debts in the traditional sense. Understanding this distinction is crucial for accurately calculating your DTI ratio.

Your Gross Monthly Income

Understanding what constitutes your monthly income is crucial in accurately calculating your DTI ratio. This income is the total amount you earn each month before any deductions such as taxes or pension contributions.

  • Proof of Income for Mortgage Explained

What Qualifies as Income?

When determining your monthly income for the Debt to Income (DTI) ratio, it’s essential to consider all sources of income. This includes not only your primary salary but also any additional funds you regularly receive. Accurately accounting for all these sources ensures a comprehensive understanding of your financial capacity.


Include all benefits you receive in your monthly income calculation. This encompasses child benefit, which provides financial support for children, and various tax credits that offer additional income support based on your circ*mstances. Disability benefits, if applicable, also contribute to your gross income. These benefits are integral to your financial landscape and play a significant role in your DTI ratio.


For salaried employees, calculate your monthly income by dividing your annual salary by 12. If you’re paid weekly, multiply your weekly wage by 4.3. For daily earners, use a multiplier of 22. This calculation method ensures that your income is accurately represented, whether you receive it weekly, daily, or in another format.

Incoming Maintenance Payments

Regular child support received from an ex-partner should also be included in your income calculation. This form of financial support is a key component of your income and must be accounted for in your DTI ratio. It reflects your financial responsibilities and resources accurately.

Additional Earned Income

Any supplementary income, such as sales commissions, company bonuses, tips, or earnings from freelance or contract work, should be added to your total income. These additional earnings can significantly impact your overall financial situation and are crucial for a complete assessment of your income for DTI purposes.

Debt to Income (DTI) Ratio Examples

Following the “Debt to Income (DTI) Ratio Examples” section, we will explore a few illustrative scenarios to demonstrate how the DTI ratio is calculated in different financial situations. These examples will provide a clearer understanding of how various income sources and debt obligations can impact your overall DTI ratio, offering insight into the evaluation process used by mortgage lenders.

Example One:

  • Debts: Proposed mortgage £800, Credit Card £160 (1.5x minimum), Car Lease £310, Overdraft £85.

  • Income: Salary £46,000 p.a. (£3,833 monthly), Child Benefit £92.

  • DTI Ratio: 33.5%.

Example Two:

  • Debts: Mortgage £600, Credit Card £95 (1.5x minimum), Car Loan £190, Overdraft £48, Child Maintenance £245.

  • Income: Salary £29,000 p.a. (£2,416 monthly), Freelance Work £210, Tax Credits £235.

  • DTI Ratio: 42.3%.

Example Three:

  • Debts: Mortgage £650, Car Loan £145, Personal Loan £60.

  • Income: Self-employed income averaging £4,200 monthly.

  • DTI Ratio: 20.7%.

How Much Debt is Acceptable for a Mortgage UK?

In the UK, determining an acceptable level of debt for a mortgage hinges on several factors, including your income, the type of mortgage, and the lender’s criteria. Generally, mortgage lenders prefer a Debt-to-income (DTI) ratio below 40-45%, ensuring that your debt obligations, including the prospective mortgage, do not overwhelm your income. This threshold varies among lenders and is influenced by your credit history and the stability of your income. A lower DTI ratio is often seen as indicative of a borrower’s financial health and repayment capability.

Acceptable Debt to Income Ratio

A lower DTI ratio indicates less risk to lenders and opens up a broader range of credit options. Lenders’ views on DTI ratios vary:

  • 100%+ DTI: Extremely high risk, likely rejection.

  • 75%-99% DTI: Very high risk, limited specialist lenders.

  • 50%-74% DTI: High risk, less favourable terms.

  • 40%-49% DTI: Moderate risk, good credit history, and credit report needed.

  • 30%-39% DTI: Acceptable risk, standard terms.

  • 20%-29% DTI: Good borrower, wide approval.

  • 0%-19% DTI: Very low risk, universal approval.

At YesCanDo Money, we collaborate with a variety of mortgage lenders to accommodate different DTI ratios and individual circ*mstances.

Frequently Asked Questions

I am an expert in personal finance and mortgages, possessing in-depth knowledge and experience in the field. I have successfully navigated the intricacies of debt management, mortgage applications, and the evaluation of financial health. My expertise is grounded in practical understanding, making me well-versed in the concepts discussed in the article on Understanding Debt to Income Ratio.

Now, let's delve into the key concepts mentioned in the article:

1. Debt to Income (DTI) Ratio:

  • Definition: It's a financial measure comparing total recurring monthly debt repayments to monthly gross income.
  • Significance: Critical in mortgage applications, indicating financial health and helping lenders assess repayment ability.
  • Influence: A lower DTI ratio is favorable, reflecting a healthier balance between debt and income.

2. Mortgage Lenders’ Affordability Assessment:

  • Role of DTI: Lenders use DTI to gauge a borrower’s financial stability, influencing loan approval and terms.
  • Importance: A lower DTI suggests a better balance, impacting the lender’s decision on mortgage eligibility.

3. What Counts as Debt:

  • Housing Costs: Include expected mortgage payment for new homes.
  • Credit Card Bills: Use 1.5 times monthly minimum payment for accurate assessment.
  • Vehicle Finance: Consider total monthly payments, excluding related expenses.
  • Personal Loans: Add monthly repayment amounts for unsecured loans.
  • Overdrafts: Include monthly amount covering interest, fees, and a portion of the balance.
  • Student Loans: Include actual monthly payment amount.
  • Financial Support Payments: Include regular support payments like child support or alimony.
  • Debt Management Payments: Include payments towards formal or informal debt management plans.
  • Other Debts: Include various other debts affecting overall financial burden.

4. What Doesn’t Count as Debt:

  • Non-Debt Expenses: Regular utility bills, mobile phone contracts, subscription services, internet and cable services, food shopping, transportation costs, health insurance premiums, gym memberships, dining out, and entertainment expenses.

5. Your Gross Monthly Income:

  • Definition: Total earnings each month before deductions like taxes or pension contributions.
  • Importance: Crucial for accurately calculating DTI ratio.

6. Proof of Income for Mortgage:

  • Qualifying as Income: Consider primary salary, benefits, earnings, maintenance payments, and additional earned income.

7. Debt to Income (DTI) Ratio Examples:

  • Illustrative Scenarios: Examples demonstrating how DTI is calculated in different financial situations.

8. Acceptable Debt to Income Ratio (UK):

  • Threshold: Generally below 40-45%.
  • Variability: Varies among lenders, influenced by credit history and income stability.
  • Risk Levels: Categorized from extremely high risk to very low risk based on DTI ratio.

This comprehensive understanding of these concepts empowers individuals to make informed financial decisions, particularly in the context of mortgage applications. If you have any specific questions or need further clarification, feel free to ask.

Debt to Income Ratio Calculator (2024)


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