Mortgage Calculator California

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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
Dec 2025

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Whether you’re buying a home or ready to refinance, our professionals can help.

 

Purchasing a home in California is a remarkable financial journey. Deciphering potential monthly payments and various costs can seem intricate. This is where the Mortgage Calculator for California home buyers steps in—a dedicated tool to assist you in adjusting your down payment and purchase figures, guiding you towards a monthly payment that complements your financial plan.

Advantages of Using the Mortgage Calculator in California:

  • Tailored Down Payment Adjustments: Deciding on the optimal down payment can be a puzzle. Our calculator offers the flexibility to modify this figure, instantly reflecting changes in your monthly obligations.
  • Alter Purchase Values: Adjust the entire purchase value in line with your set budget or based on the homes you’re considering in the Golden State. This ensures a 360-degree view of your forthcoming investment.
  • Forward-Thinking Financial Planning: Beyond mere calculations, our tool sketches your mortgage payment trajectory, proving instrumental for your future financial strategy.

How the Mortgage Calculator Operates:

  1. Feed in Fundamental Details: Start by providing the home’s price, your preferred down payment, the loan’s tenure, and the interest rate.
  2. Refine as Desired: Use the adaptable sliders or fields to fine-tune your down payment and purchase value.
  3. Immediate Outcome: Witness real-time updates, offering a renewed monthly payment estimate and a comprehensive cost breakdown.

The Mortgage Calculator for California home buyers is engineered to demystify the home acquisition process for Californians. It grants the leeway to tweak pivotal financial metrics, allowing you to make decisions rooted in clarity and insight.

If you’re looking for financing in California, we can help. Call us today to have your mortgage questions answered or visit our website to get an instant rate quote.

Common Mortgage Calculator Terms

You can use our mortgage payments calculator to provide yourself with information about the estimated monthly mortgage payments you’ll make on a new home, with the option to include your anticipated tax, insurance and PMI costs. The following types of information can be entered into the mortgage calculator to give you the best results:

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.

Rate quote isn’t what you expected?

If your instant rate quote isn’t what you expected, we can provide counsel on how to potentially transform your quote into something more acceptable. Sammamish Mortgage is a family-owned mortgage company with over 30 years of experience in the industry. We proudly serve customers in the Pacific Northwest region. We serve WA, ID, OR, CO and CA. If you’re looking to buy a home in one of these states, we can help!

Our Reviews

David Brauhn
December 10, 2025
Straightforward, honest, personal, flexible, and fast service. They kept me informed along the way and gave me options that other lenders tried and failed to match. They treated me like a valued customer.
Cynthia Eichner
November 21, 2025
Working with the team at Sammamish was extremely positive. They care and help you navigate all the details required with grace, professionalism and care. highly recommend the team to anyone!
Liz Frazer
November 17, 2025
Very easy to work with -- Ryan was always available if we had any questions. Highly recommend
Susan Williams
November 16, 2025
Excellent. Kevin was fabulous to work with. Professional, communicative and a true joy. He found a solution to my needs that many others could not.
Noriyasu Li
November 14, 2025
Nick and Tonya were absolutely fantastic to work with! From start to finish, the process was incredibly smooth and stress-free. Super competitive rates, and every single person we interacted with - from the loan officer to the processor and even the owner - was professional, friendly, and genuinely helpful. Went through 7-8 quotes and rates and they still came out on top. Highly recommend them to anyone looking for a great mortgage experience!
Rayna Ji
November 14, 2025
We had a fantastic experience working with Sammamish Mortgage! From start to finish, the team was incredibly responsive, transparent, and efficient. They offered one of the best interest rates we found during our mortgage shopping process without charging any processing or junk lender fees a huge plus that made a real financial difference. They were also very flexible and accommodating, especially as we adjusted our down payment structure a few times throughout the process. Despite the changes, they stayed on top of everything and helped keep us on track for a smooth and quick closing. If youre looking for a lender whos professional, competitive, and truly client focused, Id highly recommend them. Were so glad we chose them and would happily work with them again in the future.
Jeff Boekelman
November 12, 2025
Christine and Barb were excellent to work with throughout the process.

FAQs

How is the mortgage rate I'm offered determined in California?

Rates vary by loan type, term, credit score, down payment and the lender. 

How much does my credit score affect the rate I receive?

Your credit score is one of the key determinants of the interest rate. A higher credit score signals lower risk to the lender, which often results in a lower rate. If your score is lower, you may face higher rates or need a larger down payment.

What is the difference between a 30-year fixed-rate and a 15-year fixed-rate mortgage?

A 30-year fixed-rate mortgage means your rate stays the same, and you pay over 30 years; your monthly payments tend to be lower, but you pay more interest over the life of the loan. A 15-year fixed-rate mortgage means higher mortgage payments, but you pay off the loan faster and save significantly on interest.

Can adjustable-rate mortgages (ARMs) be a good option in California?

Yes, but with caveats. ARMs typically start with a lower rate for an initial period (e.g., 5 years) and then adjust up or down based on market conditions. In a market with uncertainty or rising rates, ARMs carry more risk of payment shock when the rate adjusts. You should assess how high your payments could go.

How much does down payment size affect my rate?

A larger down payment often means lower risk to the lender, which can lead to a better rate or more favorable terms. Also, if you put down at least 20%, you generally avoid private mortgage insurance (PMI), which improves overall monthly cost. In California’s competitive market, a stronger down payment may help secure better terms or more lender options.

Are closing costs significant in California?

Yes. In addition to interest rate, you’ll encounter closing costs (appraisal, origination fees, title insurance, escrow, etc.). California closing costs can amount to 2–5% of the purchase price in many cases. 

Can I buy down the rate in California?

Yes, you may pay “points” to buy down your rate (each point = 1% of loan amount). Paying up front for a lower rate is a trade-off depending on how long you’ll stay in the home.

Should I refinance if rates drop?

Refinancing makes sense if your new rate is significantly lower, and you can recoup the closing costs in a reasonable timeframe (typically a few years). 

How do property taxes and homeowners' insurance affect my rate or payment?

These don’t affect the interest rate directly, but they affect your total monthly payment (principal + interest + taxes + insurance). If home ownership costs get too high (including taxes/insurance), lenders may reduce how much you can borrow because your debt-to-income ratio rises.

 

 

 

How can I improve my rate offer before applying?

Before applying, consider improving your credit score, increasing your down payment, shopping around, keeping your debt low, and choosing a loan term that fits your budget.

Does Sammamish Mortgage offer rate-lock or pricing advantages?

Yes — we offer custom rate-lock options and transparent, upfront pricing with no hidden fees, helping borrowers secure the best available rate for their credit and loan type.

More Online Tools That Matter

Our additional mortgage calculator tools are also free, and use data from your unique loan situation to give you a better idea of your estimated monthly mortgage payments. You can update the amount of your budgeted home price, your down payment, the expected interest rate, and your anticipated loan term to make adjustments to your projected monthly payment.


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