Buydown Calculator

Explore savings on mortgage payments with our Buydown Calculator. It shows cash needed for reduced payments in WA, CA, OR, ID, and CO. Easy to use, it offers clear insights for homebuyers. Simply input your numbers and choose options to understand potential savings and upfront costs.

Buydown
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Payment breakdown
Amortization schedule
Payment breakdown

The total buydown fee for this loan is

See your lower monthly payment for the first years of the loan.

Select year:
/for year 1
Monthly Payment
Interest Rate
Monthly Savings
Principal and Interest
Taxes
HOA
Buydown Contribution
Insurance
Amortization schedule

Over years you'll pay and this is based on an estimated monthly payment of .

Your total principal payment is and your total interest payment is .

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

Common Buydown Calculator Terms

A buydown calculator helps estimate how a reduced interest rate—either temporary or permanent—can lower your monthly mortgage payment. The terms below explain the key inputs used to calculate buydown savings and payment changes over time.

Buydown Type

Defines whether the interest rate reduction is temporary (such as a 2-1 or 1-0 buydown) or permanent. Temporary buydowns reduce payments for a limited period, while permanent buydowns lower the rate for the full loan term.

Buydown Period

The length of time the reduced interest rate applies. For temporary buydowns, this is usually one to three years before the loan adjusts to the standard rate.

Initial Interest Rate

The lowered interest rate applied at the start of the loan during the buydown period. This rate directly impacts the reduced monthly payment shown in the calculator.

Standard Interest Rate

The regular interest rate the loan will return to after the buydown period ends. This rate is used to calculate future monthly payments once the buydown expires.

Buydown Cost

The upfront amount paid at closing to fund the buydown. This cost may be paid by the borrower, seller, builder, or lender, depending on the loan structure.

Monthly Payment Adjustment

The difference between the reduced payment during the buydown period and the standard mortgage payment. The calculator uses this to show how payments change over time.

Total Buydown Savings

The estimated amount saved during the buydown period compared to making standard payments from day one.
Rate Quote Expected

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

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.
Esteban Victorio
June 19, 2026
Sandra Harrison Brown and Shelly Nguyen Jefferson were both exceptional. They communicated extremely well to let us know what they needed from us to get our loan approved quickly. Our transaction was smooth and low stress and we would highly recommend Sammamish.
Pallavi Shrestha
June 18, 2026
10/10 experience! Shelly Nyugen and Sandra Brown were so professional, knowledgeable, and incredibly responsive throughout the entire process. They made everything smooth and stress-free, answered all my questions promptly, and ensured we closed on time. I truly appreciate their dedication and would highly recommend them to anyone looking for a reliable mortgage professional.

FAQ

How can Sammamish Mortgage offer such low rates and fees?

Since 1992 Sammamish Mortgage has offered excellent service at very competitive rates and fees. Over this time, our proven track record and quality loans have helped us build exceptional relationships with the lenders that provide you with home loans. These relationships have been built on trust, integrity, and most of all, exceptional business practices. Our long standing business partnerships allow us the ability to offer unrivaled pricing on home mortgages. This pricing, in addition to utilizing top of the line technology and low overhead, enables us to pass the savings on to you, our clients.

We do not have a large team of loan officers that require us to pay out large commissions. Instead we have a small team of highly experienced and trained professionals to handle your home loans.

When you show no points, does that also mean there are no additional charges like origination or broker fees?

Yes. At Sammamish Mortgage, when we advertise no points, it also means there are no hidden charges like origination fees. Many banks, credit unions, and mortgage companies may promote no-point loans, only to reveal later in the process or in the fine print that a minimum 1% fee is added to the loan. While this practice is legal, we believe it is misleading and does not align with transparent lending standards.

Do you guarantee your closing costs?

Yes. At the time of your pre-approval, we can guarantee all lender and 3rd party costs associated with your loan. Your costs may change if there is a valid change in circumstance such as a lower than expected appraised value, or if you decide to change your loan amount as your loan to value is a key factor in pricing your loan. Your loan specialist can go over all the different scenarios with you if you are unsure of your value on a refinance. We rarely have issues with the value on a purchase.

Who would benefit from choosing a loan with no points vs. paying points and/or origination fees?

Choosing a loan with 0 points/origination fees generally benefits the borrower for the first 4 to 7 years of the loan. This is because you exchange lower up front closing costs for a slightly higher interest rate and monthly payment. This is a great option for people that do not have excess liquid cash or emergency funds and people that are not sure how long they are planning on keeping the loan. Since most people either refinance or sell their home every 3 to 5 years, this plan can be of great value. When determining whether a no point and/or no mortgage broker fee loan would work for you, you have to carefully consider the following:

• How long you plan on staying in the property?

• Do you think that you might refinance in the near future?

• Do you have enough emergency funds saved to warrant paying higher up front costs?

If you are uncertain as to which is right for you, one of our loan specialists can assist you in making the decision that suits your needs.

What are the main factors that can affect my interest rate?

There are several key points that can affect your rate. Below is a detailed breakdown of some attributing factors that may apply:

• Credit Score: Your credit score is one of the most important factors that will determine your rate.
• Loan to Value: Your down payment in a purchase transaction or your equity in a refinance transaction also plays a key role in determining your rate. The lower your loan to value (LTV), the better your rate may be.
• Rate/term refinance vs. Cash out refinance: A rate/term refinance has a loan amount that is just enough to repay the balance of your existing mortgage. You may include all third party fees, taxes, insurance and interest into the loan amount. A cash-out refinance, on the other hand, has a loan amount that exceeds your current mortgage balance.
• Purchase vs. Refinance: There are times when lenders offer purchase specials, which allow us to offer even lower rates than we already do.
• Property type: Often times there can be pricing adjustments for condos and multi-family properties.
• Escrow Reserve: Paying your property taxes and homeowners insurance on your own rather than having them included in your house payment may cost you an additional fee. Most lenders charge a onetime fee for the impound waiver.

• Loan amount: Your loan amount can affect your pricing. If you have a large loan amount (over $417,000) there will be pricing adjustments. If your loan amount is low, there can also be pricing adjustments generally starting at $165,000 and lower.

• Subordinate financing: Having a second mortgage or Home Equity Line of Credit tied to the property can impact the terms of the first mortgage even if no money is owed on the equity line. The line is still considered a lien against your property and impacts your Combined Loan to Value.

What can cause my loan to be considered a cash-out refinance?

The obvious trigger for a cash-out refinance is borrowing more than your existing loan balance; however, consolidating debt that was not obtained as part of the original purchase is also considered a cash-out refinance. This includes second mortgages or Home Equity Line of Credits opened after you purchased the property.

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