WiseCalcs

How Much House Can I Afford? Calculate Your Budget

Determining how much house you can afford is crucial for making sound financial decisions when buying property. Our calculator helps you estimate your maximum home price and monthly costs based on your income, expenses, and current mortgage rates, ensuring you find a property within your comfortable budget range.

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House Affordability Calculator

Calculator

How Much House Can I Afford?

Estimate your maximum home price and monthly costs. Based on 2026 rates (skat.dk, finansdanmark.dk).

Income & finances

Loan details

%
years
Maximum home price
2,400,000 kr
Mortgage: 2,100,000 krDown payment: 300,000 kr
Monthly payment
10,640 kr
Principal & interest
Payment-to-income
21.3%
of gross monthly income
Loan-to-value
87.5%
Above 80% — bank loan required for excess

Estimated monthly costs

Mortgage payment10,640 kr
Property value tax (ejendomsværdiskat)1,840 kr
Interest deduction (rentefradrag ~26%)−2,048 kr
Estimated net monthly cost10,433 kr

Based on 2026 Danish rates (skat.dk). Ejendomsværdiskat: 9.2‰ base + 20.8‰ above 9,706,000 DKK. Interest deduction: ~26% tax value.

Loan summary

Total interest over term1,730,541 kr
Total cost of mortgage3,830,541 kr
Debt-to-income ratio (gældskvote)3.50x
Limiting factorIncome ceiling (3.5× rule)

Estimates only — based on 2026 rates (skat.dk, finansdanmark.dk). Actual affordability depends on credit profile, specific municipality, and lender assessment. Consult a mortgage adviser.

What is House Affordability?

House affordability refers to your financial capacity to purchase and maintain a home without overextending your budget. This calculation considers your gross income, existing debts, available deposit, and ongoing homeownership costs to determine a realistic price range for your property search.

Most financial advisors recommend that your total housing costs should not exceed 28-30% of your gross monthly income, though this can vary based on your overall debt-to-income ratio and financial circumstances. Understanding your affordability helps prevent financial strain and ensures you can comfortably meet mortgage payments while maintaining your desired lifestyle.

The affordability calculation goes beyond just the mortgage payment, incorporating property taxes, insurance, maintenance costs, and utilities to provide a comprehensive view of homeownership expenses.

The House Affordability Formula

The fundamental house affordability calculation uses the debt-to-income ratio approach:

Maximum Monthly Housing Payment=Gross Monthly Income×0.28−Monthly Debt Payments1\text{Maximum Monthly Housing Payment} = \frac{\text{Gross Monthly Income} \times 0.28 - \text{Monthly Debt Payments}}{1}

For the maximum house price calculation:

Maximum House Price=Maximum Monthly Payment×12Annual Mortgage Rate×[1−1(1+Rate12)Term in Months]+Available Deposit\text{Maximum House Price} = \frac{\text{Maximum Monthly Payment} \times 12}{\text{Annual Mortgage Rate}} \times \left[1 - \frac{1}{(1 + \frac{\text{Rate}}{12})^{\text{Term in Months}}}\right] + \text{Available Deposit}

This formula accounts for the present value of mortgage payments over the loan term. The 28% rule represents the front-end ratio, while lenders also consider the back-end ratio (total debt payments should not exceed 36-40% of gross income). These ratios help ensure borrowers can manage their mortgage payments alongside other financial obligations without defaulting.

Step-by-Step Affordability Example

Consider Sarah, who earns $75,000 annually ($6,250 monthly) with $400 in monthly debt payments and $50,000 saved for a deposit. Current mortgage rates are 4.5% for a 25-year term.

First, calculate her maximum monthly housing payment: $6,250 × 0.28 = $1,750. Subtracting existing debts: $1,750 - $400 = $1,350 available for housing costs.

Assuming $200 monthly for property taxes and insurance, she has $1,150 for mortgage payments. Using mortgage calculation tables or formulas, this payment supports approximately $210,000 in borrowing at 4.5% over 25 years.

Adding her $50,000 deposit, Sarah can afford a house priced up to $260,000. This example demonstrates how income, existing debts, and available deposit all influence your maximum affordable house price.

How to Use the House Affordability Calculator

Enter your annual gross income before taxes and deductions. This forms the foundation for calculating your maximum housing budget using standard lending ratios.

Input all monthly debt obligations including credit cards, personal loans, car payments, and student loans. The calculator uses this information to determine your remaining capacity for housing expenses.

Specify your available deposit amount and preferred mortgage term. A larger deposit reduces borrowing requirements and may qualify you for better interest rates. The calculator incorporates current market rates to provide accurate affordability estimates.

Review the results showing your maximum house price, monthly mortgage payment, and total monthly housing costs including estimated property taxes and insurance.

Additional Costs to Consider

Beyond the basic mortgage payment, homeownership involves several ongoing expenses that affect affordability. Property maintenance typically costs 1-3% of the home's value annually, covering repairs, replacements, and preventive upkeep.

Utility costs vary significantly based on property size, age, and local rates. Budget for electricity, gas, water, internet, and council rates. Energy-efficient homes may have lower utility costs but might require higher purchase prices.

Stamp duty, legal fees, building inspections, and moving costs represent significant upfront expenses beyond your deposit. These can add 3-5% to your purchase price, so ensure adequate savings beyond your deposit amount.

Pre-Approval and Budget Flexibility

Obtaining mortgage pre-approval provides a more accurate affordability assessment than online calculators alone. Lenders evaluate your complete financial picture, including credit history, employment stability, and assets, to determine your actual borrowing capacity.

Consider building a buffer into your budget for unexpected expenses or interest rate increases. Variable rate mortgages can fluctuate, potentially increasing your payments. A conservative approach ensures you can manage payment increases without financial stress.

Remember that maximum affordability doesn't always equal comfortable affordability. Consider your lifestyle goals, family plans, and career stability when setting your house hunting budget. Many buyers find happiness purchasing below their maximum capacity, leaving room for other financial goals and unexpected opportunities.

Frequently Asked Questions

Financial experts typically recommend spending no more than 28-30% of gross monthly income on housing costs. This includes mortgage payments, property taxes, insurance, and maintenance. Some lenders may approve higher ratios, but staying within this range helps ensure comfortable affordability and financial flexibility for other expenses and savings goals.
Deposit requirements vary by lender and loan type, but typically range from 5-20% of the purchase price. A larger deposit often secures better interest rates and avoids mortgage insurance premiums. First-time buyers may access schemes requiring smaller deposits, while investment properties usually require larger deposits of 20% or more.
Yes, mortgage pre-approval is highly recommended before serious house hunting. Pre-approval provides an accurate borrowing capacity based on your complete financial profile, strengthens your position when making offers, and helps focus your search on affordable properties. The process typically takes 1-3 days and gives you confidence in your budget.
Beyond the purchase price and deposit, budget for stamp duty, legal fees, building inspections, and moving costs. Ongoing expenses include council rates, insurance, utilities, and maintenance (typically 1-3% of property value annually). These additional costs can add 3-5% to your purchase price upfront, plus ongoing monthly expenses.
Interest rates significantly impact affordability - each 1% rate increase can reduce borrowing capacity by approximately 10-12%. Higher rates mean larger portions of payments go toward interest rather than principal. When rates are rising, consider fixed-rate mortgages for payment certainty, and always factor potential rate increases into your budget planning.
Yes, but existing debts reduce your borrowing capacity. Lenders typically require total debt payments (including the new mortgage) to stay below 36-40% of gross income. Paying down high-interest debts before applying can improve your affordability. Consider debt consolidation or delayed purchase if current obligations significantly limit your housing budget.
Self-employed borrowers face stricter documentation requirements and typically need 2-3 years of tax returns and financial statements. Lenders may average income over multiple years or apply conservative estimates. Maintaining detailed financial records, minimizing business deductions that reduce declared income, and working with experienced mortgage brokers can improve approval chances and affordability assessments.