Mortgage · 2026-07-22

$300K vs $400K House: Which Home Can You Really Afford?

Compare a $300K vs $400K house using mortgage payments, down payment, taxes, insurance, maintenance, and total housing costs to determine which home may fit your budget.

A lender may approve you for a $400,000 home, but that does not necessarily mean a $400,000 home is the right choice for your budget. The real question is whether you can afford the complete cost of homeownership while still saving for emergencies, retirement, and other financial goals. As an illustration, assuming a 30-year fixed mortgage at 6.5% with 20% down, a $300,000 home requires a $60,000 down payment and an estimated $1,517 monthly principal-and-interest payment. A $400,000 home requires an $80,000 down payment and an estimated $2,023 monthly principal-and-interest payment. That is about $506 more per month before property taxes, homeowners insurance, HOA fees, maintenance, and other costs.

$300K vs $400K House: Quick Answer

If both homes meet your needs, the $300,000 home is generally the more financially conservative choice because it requires less cash upfront and creates lower monthly housing costs. The $400,000 home may still be affordable if your income is stable, your existing debts are manageable, your emergency savings are strong, and the higher housing costs do not interfere with your other financial priorities.

The Key Difference

The difference between a $300,000 and $400,000 home is not limited to the $100,000 difference in purchase price. With a 20% down payment, the more expensive home requires an additional $20,000 upfront and creates an additional $80,000 in mortgage debt. The higher property value may also increase property taxes, homeowners insurance, maintenance costs, and other ownership expenses.

$300K vs $400K at a Glance

| Factor | $300K Home | $400K Home | | :--- | :--- | :--- | | Purchase price | $300,000 | $400,000 | | 20% down payment | $60,000 | $80,000 | | Mortgage amount | $240,000 | $320,000 | | Example interest rate | 6.5% | 6.5% | | Loan term | 30 years | 30 years | | Approx. monthly P&I | $1,517 | $2,023 | | Monthly P&I difference | — | About $506 more | | Annual P&I difference | — | About $6,072 more | | Other costs | Taxes, insurance, maintenance, HOA | Typically higher than $300K home |

How Much Is the Monthly Payment on a $300K House?

Using a hypothetical 30-year fixed mortgage at 6.5% with a 20% down payment, a $300,000 home requires a $60,000 down payment and a $240,000 mortgage. The estimated monthly principal-and-interest payment is approximately $1,517. This figure does not include property taxes, homeowners insurance, HOA fees, mortgage insurance, or maintenance.

Estimated $300K Home Costs

- Purchase price: $300,000 - 20% down payment: $60,000 - Mortgage amount: $240,000 - Example rate: 6.5% - Loan term: 30 years - Estimated principal and interest: about $1,517 per month - Estimated annual principal and interest: about $18,204

Your Actual Housing Cost Will Be Higher

The mortgage payment is only one part of the housing budget. Your total monthly housing cost may also include property taxes, homeowners insurance, HOA fees, mortgage insurance if applicable, and a maintenance reserve. These costs vary significantly by location and property, so they should be estimated separately.

How Much Is the Monthly Payment on a $400K House?

Using the same hypothetical 30-year fixed mortgage at 6.5% with a 20% down payment, a $400,000 home requires an $80,000 down payment and a $320,000 mortgage. The estimated monthly principal-and-interest payment is approximately $2,023.

Estimated $400K Home Costs

- Purchase price: $400,000 - 20% down payment: $80,000 - Mortgage amount: $320,000 - Example rate: 6.5% - Loan term: 30 years - Estimated principal and interest: about $2,023 per month - Estimated annual principal and interest: about $24,276

The Difference Between the Two Homes

Under these assumptions, the $400,000 home requires $20,000 more for the down payment and $80,000 more in mortgage debt. The estimated principal-and-interest payment is about $506 higher per month, or approximately $6,072 more per year. The actual difference in total housing costs may be greater after property taxes, insurance, maintenance, and other expenses are included.

What Is the Real Cost of a $300K vs $400K House?

The purchase price alone does not determine affordability. A realistic comparison should include the mortgage payment, property taxes, homeowners insurance, HOA fees, mortgage insurance when applicable, maintenance, and the opportunity cost of the cash used for the down payment.

Property Taxes

Property taxes vary substantially by location and property value. A $400,000 home may have a higher annual property tax bill than a $300,000 home, although local tax rates and assessment rules determine the actual amount.

Homeowners Insurance

Insurance premiums depend on location, property characteristics, coverage limits, deductibles, and local risks. The more expensive home may have higher replacement costs and therefore higher insurance expenses, but actual premiums should be based on insurance quotes rather than a simple percentage assumption.

Maintenance and Repairs

Homeowners should budget for ongoing maintenance and unexpected repairs. A common planning guideline is to reserve around 1% of the home's value per year, but actual costs can be much higher or lower depending on the age, size, condition, and location of the property. This is a budgeting estimate, not a guaranteed expense.

Closing Costs and Cash Reserves

The down payment is not the only cash needed to buy a home. Buyers may also need money for closing costs, prepaid taxes and insurance, inspections, moving expenses, and immediate repairs. After closing, maintaining an emergency fund is also important. A home that consumes nearly all of your available cash may be less affordable than the mortgage payment suggests.

How Much House Can You Really Afford?

Home affordability should be based on your complete financial situation rather than the maximum amount a lender is willing to approve. A lender evaluates whether you meet its underwriting requirements, while your personal budget should also consider savings goals, retirement contributions, lifestyle expenses, emergency reserves, and financial risk tolerance.

Start With Your Gross Monthly Income

Convert your annual household income into gross monthly income. For example, a household earning $100,000 per year has gross monthly income of approximately $8,333. A housing budget of 25% to 30% of gross income would be approximately $2,083 to $2,500 per month. This is a general budgeting reference, not a universal affordability rule.

Include Your Existing Debt

Your mortgage is not your only financial obligation. Include car loans, student loans, credit card minimum payments, personal loans, and other recurring debt when evaluating affordability. Two households with the same income can have very different home-buying budgets because their existing debt obligations differ.

Protect Your Emergency Savings

A home purchase should not leave you with no cash reserves. Homeowners may face unexpected repairs, insurance deductibles, appliance replacement, and other costs. If buying the $400,000 home would consume most of your savings, the $300,000 home may provide greater financial resilience.

Example: Can Someone Earning $100K Afford a $300K or $400K House?

Suppose a household earns $100,000 per year before taxes, or approximately $8,333 in gross monthly income. A general housing budget of 25% to 30% of gross income would be approximately $2,083 to $2,500 per month. Whether that household can comfortably afford a $300,000 or $400,000 home depends on the complete housing payment and the household's other financial obligations.

The $300K Scenario

With the assumptions in this example, the $300,000 home has an estimated principal-and-interest payment of about $1,517 per month. After adding taxes, insurance, HOA fees if applicable, and maintenance, the total housing cost may approach or exceed the household's target budget depending on location and property characteristics.

The $400K Scenario

The $400,000 home has an estimated principal-and-interest payment of about $2,023 per month under the same assumptions. Once taxes, insurance, HOA fees, maintenance, and other costs are included, the total housing cost may be significantly above the mortgage payment alone. Existing debt obligations can make the higher-priced home substantially less affordable.

The Important Lesson

Income alone does not determine affordability. The same $100,000 household income could comfortably support one home and struggle with another depending on interest rates, down payment, property taxes, insurance, debt payments, and savings.

When Is the $400K House Worth the Extra Cost?

The $400,000 home may be worth the additional cost when the higher price provides meaningful long-term value and the payment remains comfortably affordable. The additional cost may be justified by a better location, more suitable size, lower expected maintenance, better access to work or transportation, or features that allow the household to stay in the property longer.

Choose the $400K Home If It Fits Your Full Budget

A $400,000 home may be reasonable if you can comfortably cover the higher payment while maintaining emergency savings, retirement contributions, and other financial priorities. The higher payment should not require you to rely on credit cards for normal expenses or stop saving for important long-term goals.

Choose the $400K Home If It Meets Long-Term Needs

Buying a home that meets your needs for a longer period may reduce the chance of moving again and paying additional transaction costs. However, this benefit should be weighed against the higher purchase price and ongoing ownership costs.

When Is the $300K House the Better Choice?

The $300,000 home is generally the better choice when the $400,000 option would make your budget tight, reduce your emergency reserves, or interfere with other important financial goals. The lower-priced home may also be preferable when income is variable or when you have significant existing debt.

Choose the $300K Home for Greater Cash-Flow Flexibility

Under the example assumptions, choosing the $300,000 home reduces principal-and-interest costs by about $506 per month compared with the $400,000 home. That difference could instead be directed toward emergency savings, retirement contributions, debt repayment, or other financial priorities.

Choose the $300K Home If You Are Near Your Budget Limit

If the $400,000 home only works when everything goes according to plan, it may be too expensive. A sustainable housing budget should leave room for income changes, unexpected expenses, and normal life events.

How Does the Down Payment Change the Comparison?

The 20% down payment example is useful for comparison, but it is not the only way to finance a home. A lower down payment preserves more cash but increases the mortgage balance and may result in mortgage insurance or other additional costs.

$300K Home With Different Down Payments

| Down Payment | Cash Down | Approx. Loan Amount | | :--- | :--- | :--- | | 5% | $15,000 | $285,000 | | 10% | $30,000 | $270,000 | | 20% | $60,000 | $240,000 |

$400K Home With Different Down Payments

| Down Payment | Cash Down | Approx. Loan Amount | | :--- | :--- | :--- | | 5% | $20,000 | $380,000 | | 10% | $40,000 | $360,000 | | 20% | $80,000 | $320,000 |

Lower Down Payment vs More Cash Reserves

A larger down payment reduces the amount borrowed and may reduce monthly costs, but it also ties more of your cash to the property. A smaller down payment preserves liquidity but may increase the mortgage payment and potentially add mortgage insurance. The right choice depends on your interest rate, mortgage insurance costs, emergency fund, and alternative uses for your cash.

How to Decide Between a $300K and $400K House

The best way to compare the two homes is to calculate the complete monthly cost for each scenario and then evaluate the impact on your overall financial plan. Do not compare the purchase prices alone or rely only on the lender's maximum approval amount.

Step 1: Compare Mortgage Payments

Calculate principal and interest using the actual loan amount, interest rate, and loan term. Then compare the results for both homes.

Step 2: Add the Complete Housing Cost

Add property taxes, homeowners insurance, HOA fees, mortgage insurance if applicable, and a reasonable maintenance reserve. This gives you a more realistic estimate of the cost of owning each home.

Step 3: Check Your Debt-to-Income Ratio

Include your proposed housing payment and existing recurring debt obligations. A higher-priced home can increase your debt-to-income ratio and reduce your financial flexibility.

Step 4: Check Your Cash Reserves

Make sure you will still have adequate savings after the down payment, closing costs, moving expenses, and other upfront costs. Avoid choosing a home that leaves you financially exposed immediately after closing.

Step 5: Consider the Opportunity Cost

The extra money spent on the $400,000 home could otherwise be used for investments, retirement savings, debt repayment, or other financial goals. Consider whether the additional space, location, or features are worth the long-term financial trade-off.

Final Answer: $300K vs $400K House

If you are deciding between a $300,000 and $400,000 home, the $300,000 home is generally the safer choice when both properties meet your needs and the lower payment gives you more financial flexibility. The $400,000 home may be the better choice when the additional cost is comfortably affordable and provides meaningful long-term value. The right question is not simply "Can I qualify for the $400,000 home?" but "Can I comfortably own it while continuing to save, invest, manage debt, and handle unexpected expenses?"

Simple Decision Rule

- Choose the $300K home if the lower payment materially improves your financial flexibility. - Choose the $400K home if the higher total housing cost is comfortably affordable and the additional value is important to your long-term needs. - If the $400K home requires you to drain your savings or stop other important financial goals, the $300K home is usually the more sustainable choice.

Calculate How Much House You Can Afford

Use a home affordability calculator to estimate a realistic purchase price based on your income, debts, down payment, and expected housing costs. Then use a mortgage calculator to compare monthly payments and total interest for different home prices and loan terms. Running both calculations gives you a clearer picture of what you may be able to afford and what the home will actually cost over time.

Find Out How Much House You Can Really Afford

Compare home prices, down payments, interest rates, and loan terms to estimate your monthly housing costs and find a home that fits your budget.

Use the Home Affordability Calculator

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Frequently Asked Questions

What affects a mortgage payment?

Mortgage payments are affected by loan amount, interest rate, repayment term, property taxes, and insurance costs.

Does a lower interest rate reduce mortgage costs?

Yes. A lower interest rate usually reduces monthly payments and total interest paid.

What is an amortization calculator?

An amortization calculator is a tool that creates a loan repayment schedule showing monthly payments, principal, interest, and remaining balance.

What is a home affordability calculator?

A home affordability calculator estimates how much home you may be able to afford based on income, expenses, down payment, and mortgage costs.