San Francisco, CA Mortgage Calculator

Home prices and financing options can vary significantly, making it important to understand your monthly costs before buying. Our San Francisco Mortgage Calculator allows you to estimate your mortgage payment, compare different financing scenarios, and adjust key variables such as your down payment, loan term, interest rate, taxes, and insurance.

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Aberdeen WA (Grays Harbor)
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Home Price

Down Payment ($ or %)

Interest Rate

Loan Program (years fixed)

Property Tax (per year)

Home Insurance (per year)

HOA Dues (per month)

View full report

Payment breakdown

Amortization schedule

Payment breakdown

Monthly Payment

How is my monthly payment calculated?

Principal and Interest

Private Mortgage Insurance

Property Tax

Homeowners Insurance

HOA/Other

Amortization schedule

Principal Remaining Interest Paid Principal Paid

Estimated Payoff

Jul 2026

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Common Mortgage Calculator Terms

Sammamish Mortgage makes use of an innovative software platform that provides you with an instant rate quote. The system does this by comparing multiple lenders and investors from across the US, providing real-time results. All you need to do to get your rate quote is to input a few pieces of information, and within seconds, you’ll receive an accurate breakdown of the interest rates and costs available for you. You won’t have to supply any personal information to obtain this data, either. The mortgage experts at Sammamish Mortgage always work to ensure that the best interests of our clients are always met.

By Home Price

Work forward based on the price of the home you want to figure out your best loan term and potential monthly payment.

By Affordability

Use your down payment and monthly budget to discover how much home you can afford, then save up to $3000 by comparing top lender quotes.

By Monthly Payment

Input your monthly payment to discover what kind of loan will work best for you, then fill out an application with a lender to verify the estimate.

Bi-Monthly Payment

Pay every other week instead of once a month and save thousands over your loan term by reducing the principal amount quickly.

Home Price

You can input the amount you plan to offer for the home of your dreams or run the numbers based on the home list price.

Down Payment

Take your savings, deduct the amount you’ll need for closing costs, and what’s left will serve you as a down payment.

Interest Rate

Remember that your interest rate will vary depending on the lender you choose, your loan program, and your credit score.

Loan Program

Depending on the type of loan you get (FHA, VA, USDA, or conventional), your finances will be impacted differently.

Property Tax

The assessed value of the home multiplied by the local tax rate will give you the estimated amount of your property tax.

Home Insurance

Home value and location will both impact how much you will have to pay for home insurance to protect your investment.

Monthly Private Mortgage Insurance

You’ll need to pay PMI ranging from 0.5% to 2% of the loan amount if your down payment amounts to less than 20% of the home price.

HOA Dues

A homeowners association (HOA) will charge monthly or annual dues, so find out if your home is located in an affected neighborhood.

Additional Principal Payment

If you can make a larger than required payment every month, the additional funds can go to reduce your loan principal.

Annual Income

Divide your annual income by 12 months to arrive at the monthly income that will be used when determining your ability to repay.

Monthly Debts

Add all recurring expenses or payments that you owe every month (like credit card bills or auto loan payments) to arrive at your monthly debt.

DTI

Compare your monthly income and monthly debt to find out what your debt to income (DTI) ratio is, the lower this number is, the better.

Desired Monthly Payment

A bigger monthly payment means you’ll pay off your loan more quickly, cutting years and interest costs off your mortgage.

Biweekly Payments

If you make half of a mortgage payment every other week, it works out to a whole extra mortgage payment every year.

Estimated Payoff

Ask your mortgage company to provide you with your amortization schedule so you can learn your estimated payoff date.

Live Mortgage Rates by States

Compare today’s mortgage rates and get personalized rate quotes based on your location, loan type, and home financing goals.

Benefits of Using the San Francisco, CA Mortgage Calculator:

Dynamic Down Payment Adjustments: San Francisco’s diverse housing market demands flexibility. Our calculator empowers you to tweak your down payment, providing instant feedback on monthly obligations.
Versatile Purchase Value Modifications: Adapt the entire purchase sum in harmony with your budget or the kind of homes you’re contemplating in San Francisco’s eclectic neighborhoods, ensuring a thorough understanding of your imminent investment.
Strategic Financial Visualization: The calculator goes beyond mere numbers, laying out a clear trajectory of your mortgage payments, invaluable for your long-term fiscal planning amidst the city’s scenic bay views.

Estimate Your Monthly Mortgage Payment in San Francisco, CA

Getting started with our San Francisco, CA Mortgage Calculator is quick and straightforward:

Enter the estimated purchase price of your home in San Francisco, CA.
Choose your down payment amount or percentage.
Select your preferred loan term and estimated interest rate.
Include estimated property taxes, homeowners insurance, and HOA dues if applicable.
Review your estimated monthly mortgage payment and adjust the numbers to compare different financing scenarios.

Our San Francisco, CA Mortgage Calculator recalculates your payment instantly as you update each field, making it easy to explore different borrowing options and understand how changes in your financing affect your monthly housing costs. Whether you’re buying your first home, moving within San Francisco, CA, purchasing an investment property, or refinancing your current mortgage, this tool can help you plan with greater confidence.

Factors That Affect Your Mortgage Payment

Your monthly mortgage payment depends on several important factors. Understanding how each one affects your loan can help you estimate costs more accurately, compare financing options, and choose the mortgage that best fits your budget. Use our mortgage calculator to see how changes in these variables can influence your monthly payment and the total cost of your home loan.

Home Price & Down Payment

The more you put down upfront, the less you need to borrow. A larger down payment can lower your monthly payment and may help you avoid PMI.

Interest Rate

Your interest rate affects both your monthly payment and the total cost of the loan. Even a small rate difference can lead to significant savings over time.

Loan Term

A shorter loan term typically means higher monthly payments but less interest paid overall. A longer term offers lower monthly payments but increases total interest costs.

Taxes, Insurance & PMI

Property taxes, homeowners insurance, and PMI (if required) can add to your monthly mortgage payment and should be included when estimating housing costs.

Mortgage Payment Calculation Formula

Use the formula below to calculate your monthly mortgage payment and better understand how home loans are structured.

M = P · [ r(1 + r)ⁿ / ((1 + r)ⁿ − 1) ]

Estimated monthly mortgage payment.

Total loan principal, or the amount borrowed from the lender.

Monthly interest rate. To calculate it, divide the annual interest rate by 12. For example, an annual rate of 5% equals a monthly rate of 0.004167 (0.05 ÷ 12).

Total number of mortgage payments. Multiply the loan term in years by 12. For example, a 30-year mortgage results in 360 monthly payments (30 × 12).

Understanding Your Results

After clicking “View Full Report,” you’ll see a complete breakdown of your mortgage estimate, including your monthly payment, required upfront cash, and total interest costs. These insights can help you better understand the financial commitment of your home purchase and compare different loan scenarios with confidence.

Monthly Payment

Your estimated monthly mortgage payment includes the principal and interest based on the loan amount, interest rate, and loan term you selected. Depending on your loan and location, your payment may also include estimated property taxes, homeowners insurance, mortgage insurance (PMI), and HOA dues. Keep in mind that your final payment may vary based on lender requirements, escrow amounts, and your specific loan program.

Cash Required at Closing

This estimate shows the funds you’ll likely need to complete your home purchase. It typically includes your down payment, estimated closing costs, prepaid taxes and insurance, and other upfront expenses required at closing. The exact amount will depend on factors such as your loan program, property location, negotiated seller credits, and lender fees.

Total Interest Paid

This estimate represents the total interest you could pay over the life of your mortgage if you make all scheduled payments and keep the loan for its full term. Making extra principal payments, refinancing, or paying off your mortgage early can reduce the total interest you pay over time.

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How Much House Can You Afford?

Your monthly mortgage payment should fit comfortably within your overall budget. Many financial professionals use the 28/36 rule as a general guideline:

Spend no more than 28% of your gross monthly income on housing expenses.
Spend no more than 36% of your gross monthly income on total debt obligations, including your mortgage.

While these benchmarks can help estimate affordability, the right mortgage is one that supports your long-term financial goals and leaves room for savings, emergencies, and future expenses.

Compare Mortgage Loan Options Available in WA, OR, ID, CA & CO

30 Year Fixed Rate Mortgage

Jumbo Mortgage Loan

Cash Buyer Program

Bridge Loans

Diamond Homebuyer Program

Fixed Rate Mortgages

Investment Property Mortgage Loan

Second Home Mortgage Loans

Self-Employed Mortgage Loan

Our Reviews

Hannah Polterock

July 9, 2026

Working with Sammamish Mortgage has been incredible. The whole team was always fast to respond to any questions, and we felt supported through the process. Really appreciated the reassurance and work everyone put in to make sure we closed on time, even with a fairly tight closing timeline of three weeks. Shoutout to Christina Heaps and Barb Kite, they are the absolute best!

Patrick Stancil

July 7, 2026

Ryan and his team (shout out to Shelly) are nothing but professional and the absolute best! They were highly responsive and frequently in touch to make sure we were set to close on time. I can't recommend this team enough!

Shelby Hallford

July 6, 2026

I had never heard of Sammamish prior to this home purchase, and it's not my first home purchase. Im so glad we found them, Jessica and Shawn were incredible! Jessica was out a day on the weekend early on when still rate shopping and a teammate of hers gave a rapid response, which mattered to us and helped move the process when other companies wouldn't. She beat out competitors and was responsive. Shawn stepped in to work through the logistical side of things once we had decided to proceed, and without him, I dont think we would've closed on time due to some slow communication with other partners during the process. He was the one I leaned on most (between lending, title, and buying agent), even with questions not meant for him, due to his knowledge and responsiveness. Would 100% recommend to friends and family!

Zachary Deeds

June 30, 2026

Extremely communicative, fast to close and great rates. Couldnt be better for first time buyers like ourselves.

Robert MacDonald

June 25, 2026

Drew Ebner and his team were fantastic. Great communication, very prompt in their responses, and really helped guide us through every step of the process. Drew gave us spreadsheets to help us estimate mortgage amounts across a variety of interest rates and home values, which really enabled us to have confidence when viewing homes. The pre-approval process was another confidence-builder for the whole process as well. Drew was always quick to answer questions, kept me in-the-loop the whole way, and Shelly was a fantastic partner as well. They really made this extremely simple, something my wife and I are enormously grateful for through this, our first homebuying experience. Highly appreciative and will recommend the team to anyone else we know who is looking to buy!

J Hinshaw

June 25, 2026

Saved us money, time, and gave us peace of mind with their responsiveness and helpfulness. Got me a great interest rate! Would recommend to any and all

Cailen McDevitt

June 22, 2026

We used them for buying our first house. Very responsive, personable, helpful, good rate options, and they were able to help us close on our house in 21 days. We would certainly work with them again in the future.

FAQ

How can a mortgage calculator help me buy a home in San Francisco?

A San Francisco mortgage calculator helps you estimate your monthly mortgage payment before you begin your home search. By adjusting the purchase price, down payment, interest rate, and loan term, you can quickly see how different financing options affect your monthly budget and determine a comfortable price range.

Why is it important to estimate the full monthly cost of homeownership in San Francisco?

Your mortgage payment is only one part of your monthly housing expenses. It’s also important to account for property taxes, homeowners insurance, possible HOA dues, and PMI if your down payment is below 20%. Including these costs gives you a more realistic estimate of what owning a home in San Francisco may cost each month.

How does a larger down payment affect my mortgage?

Making a larger down payment reduces the amount you need to borrow. This can lower your monthly mortgage payment, reduce the total interest paid over the life of the loan, and may eliminate the need for Private Mortgage Insurance (PMI) on a conventional mortgage.

Can I compare different home prices with the San Francisco mortgage calculator?

Yes. You can easily adjust the purchase price to compare multiple properties and see how each one affects your monthly payment. This is especially helpful when evaluating homes across different San Francisco neighborhoods or deciding whether a higher-priced property fits your budget.

How much does the loan term affect my monthly payment?

The loan term has a significant impact on your payment. A 15-year mortgage generally comes with higher monthly payments but lower total interest costs, while a 30-year mortgage spreads payments over a longer period, resulting in lower monthly payments but more interest paid over time.

Does the San Francisco mortgage calculator include property taxes and insurance?

Yes. You can enter estimated property taxes and homeowners insurance to create a more accurate monthly payment estimate. These costs vary by property and location, so customizing them provides a better reflection of your expected housing expenses.

Can I use this calculator if I’m refinancing a home in San Francisco?

Absolutely. If you’re refinancing, simply enter your estimated loan amount, interest rate, and loan term to estimate your new monthly payment. Comparing different scenarios can help you evaluate whether refinancing aligns with your financial goals.

How does my credit score influence my mortgage payment?

Your credit score affects the interest rate a lender may offer. A stronger credit profile can help you qualify for a lower mortgage rate, reducing both your monthly payment and the total interest you’ll pay throughout the life of the loan.

Is this mortgage calculator useful for investment properties in San Francisco?

Yes. While the calculator estimates mortgage payments for any property, it’s also a useful tool for investors who want to compare financing scenarios and estimate monthly loan costs before purchasing a rental or investment property in San Francisco.

Is the San Francisco mortgage calculator accurate?

The calculator provides a reliable estimate based on the information you enter. Your final mortgage payment may differ depending on your approved interest rate, loan program, lender fees, property taxes, homeowners insurance, and other closing costs. For the most accurate figures, request a personalized mortgage quote from a lender.