Mortgage Calculator - Estimate Your Monthly Mortgage Payment
Calculate your real monthly home loan payment: principal, interest, property taxes, insurance, PMI, and HOA. This Silicon Valley mortgage calculator uses live Freddie Mac rate data, updated weekly. Built for Silicon Valley buyers by Don Orason, 25+ years of local expertise.
What this calculator covers: Enter a purchase price, down payment, loan term, interest rate, property tax, insurance, PMI, and HOA fees to see an estimated monthly payment broken into its components. The calculator uses live Freddie Mac rate data updated weekly. Conforming loan limits reflect current FHFA figures for Santa Clara County. All estimates are illustrative; consult a licensed lender for your specific scenario.
Rates sourced weekly via Freddie Mac PMMS®, loading…
| Year | Annual Payment | Principal | Interest | Remaining Balance |
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How to Use This Silicon Valley Mortgage Calculator
This calculator accepts six inputs and updates payment estimates in real time. Work through each field in order: start with the home price, set your down payment, confirm the interest rate, choose a loan term, adjust the property tax and insurance to your situation, then add any HOA or Mello-Roos fees that apply.
Type the purchase price of the home you are considering. The default reflects a typical Silicon Valley purchase. Adjust to any price point.
Drag the slider or type a dollar amount. The percentage updates automatically. Dropping below 20% adds a PMI estimate to the total.
The rate auto-populates from the latest Freddie Mac weekly average. Replace it with your lender's quoted rate for a precise estimate.
Loan term options: 30, 20, 15, or 10-year fixed. Property tax defaults to 1.25% as an illustrative starting point, not your actual rate. Tax rates vary by property and county. Adjust the insurance and HOA or Mello-Roos fields to match your situation; verify your actual tax rate with your county records.
Use the Extra Monthly Principal field to see how much interest you save and how many years you shave off the loan. It is one of the most powerful financial levers available to homeowners.
What Goes Into a Monthly Mortgage Payment?
Every mortgage payment is built from the same four core components, commonly referred to by lenders and financial planners as PITI. In practice, knowing what each piece covers helps you evaluate whether a home fits your budget before you ever make an offer. Know each piece before you bid.
Based on $1.5M home, 20% down, current 30-year rate. Adjust the calculator above to your scenario
Principal & Interest
The principal pays down the amount you borrowed. Interest is the lender's charge for the loan. In the early years of a 30-year mortgage, most of each payment goes toward interest, a ratio that gradually inverts over time. The amortization schedule above shows this shift year by year.
Property Taxes & Insurance
Property taxes are assessed annually by your county and typically collected monthly through your lender's escrow account. Homeowners insurance protects against covered losses. Together, these can add substantially to monthly costs in Silicon Valley.
What Is PMI?
Private Mortgage Insurance is required on conventional loans when the down payment is less than 20%. PMI typically costs 0.5–1.0% of the loan amount annually and protects the lender (not you) in case of default. The calculator automatically estimates PMI when your down payment drops below 20%. Verify your lender's exact PMI rate.
Once your equity reaches 20%, you can request PMI removal. Learn more in the FAQ below.
The Mortgage Payment Formula
The principal-and-interest portion uses the standard amortization formula: M = P × [r(1+r)ⁿ] ÷ [(1+r)ⁿ – 1], where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is total payments (years × 12). The calculator handles this math instantly. Plug in your numbers and results update in real time.
The buyers who feel most prepared at close are the ones who modeled property taxes, insurance, and Mello-Roos alongside principal and interest from the start.
What Are Mortgage Rates Right Now?
The rate ticker at the top of this page pulls Freddie Mac Primary Mortgage Market Survey data, updated every Thursday and widely considered the industry benchmark. The 30-year and 15-year fixed averages shown represent the national weekly average for conforming loans. Your actual rate will differ. Credit score, loan-to-value ratio, property type, and lender all factor in.
Even small rate differences have an outsized impact on total cost. For example, on a large loan typical of Silicon Valley, the difference between a competitive rate and a mediocre one can mean hundreds of dollars per month and tens of thousands over the life of the loan. Shopping multiple lenders and locking at the right time is not optional. Few financial decisions carry more weight.
What Drives Mortgage Rates?
What actually moves mortgage rates? Not the Fed's benchmark rate, at least not directly. Mortgage rates actually track the yield on the 10-year Treasury note, which bends with investor expectations around inflation and economic growth.
When inflation expectations soften, yields fall and mortgage rates tend to follow. The Fed shapes that environment through monetary policy, but the connection is indirect.
How Much House Can You Afford?
Most financial advisors and lenders use the 28/36 rule as a starting guideline: spend no more than 28% of your gross monthly income on total housing costs, and no more than 36% on all debt payments combined, including car loans, student loans, and credit cards.
To stress-test a price range, enter it above and set your actual down payment. The resulting monthly payment should land at or below 28% of gross monthly income. That threshold is what most lenders use during pre-approval.
Over it? Pull the price down until it fits.
What Does Extra Principal Payment Save You?
The math surprises most buyers. Even a modest extra principal payment each month chips away at the balance faster than expected. As a result, total interest drops substantially, and the payoff date moves closer in ways that compound over time. The Extra Monthly Principal field above shows your specific numbers.
How Do You Choose the Right Mortgage?
The right mortgage depends on how long you plan to stay, how much payment flexibility you need, and whether your income qualifies for a shorter payoff horizon. In practice, four loan structures cover most Silicon Valley purchase scenarios, each with a distinct trade-off between monthly cost and total interest paid. No single term fits everyone.
30-Year Fixed
The most popular mortgage in the United States. Payments remain constant throughout the term, which makes long-term budgeting predictable. However, the trade-off is a higher rate than shorter terms and considerably more total interest paid over time.
15-Year Fixed
A lower interest rate and dramatically less total interest, but the monthly payment is significantly higher. That said, it's ideal for buyers with strong cash flow who want to build equity rapidly and own their home outright sooner.
FHA Loans
FHA loans are government-backed and designed for buyers who need a lower barrier to entry. Credit scores as low as 580 qualify with 3.5% down. That said, mandatory mortgage insurance premiums stay for the life of the loan. Common in Silicon Valley's entry-level markets.
VA Loans
Available to eligible veterans, active-duty service members, and surviving spouses, with no down payment required and no monthly mortgage insurance. VA loans consistently offer some of the lowest rates available. Learn more at VA.gov.
30-Year vs. 15-Year Fixed: Which Costs More on a $1.2M Loan?
A 30-year mortgage delivers lower monthly payments but accumulates significantly more total interest. The 15-year alternative carries a lower rate and cuts the repayment timeline in half. Which is right for you depends on monthly cash flow and how long you plan to stay. Figures below update with the live rate.
These figures use the current live rate above. Adjust the calculator for your loan amount →
Conforming vs. Jumbo Loans in California
The Federal Housing Finance Agency sets annual loan limits, and where that ceiling falls determines which loan product a buyer needs. A conforming loan stays within the FHFA limit. Designated high-cost areas, including Santa Clara County, San Mateo County, and most Bay Area counties, have a higher ceiling. Exceed that ceiling and the loan automatically becomes a jumbo mortgage.
Jumbo loans typically require a credit score of 700 or higher, a down payment of at least 10–20%, substantial cash reserves, and thorough income documentation. However, in Silicon Valley, where home prices in many cities exceed $1.5 million, jumbo financing is extremely common, not the exception. Jumbo rules vary by lender.
What Are Closing Costs in California?
Expect to set aside money beyond your down payment. In California, buyers typically cover 1–3% of the purchase price in one-time closing fees: loan origination, appraisal, title insurance, escrow, and recording fees among them. On a higher-priced Silicon Valley transaction, that 1–3% adds up fast.
- Loan origination fee: 0.5–1.0% of the loan amount, charged by your lender for processing the mortgage.
- Appraisal fee: $500–$1,500 depending on property size and complexity, required by the lender.
- Title insurance: Protects against ownership disputes. Both a lender's and owner's policy are standard in California.
- Escrow fees: Split between buyer and seller, covering the neutral third party that handles fund transfers and document recording.
- Prepaid items: Property taxes, homeowners insurance, and per-diem interest prorated to your closing date.
Sellers in California also pay transfer taxes and typically cover the real estate commission. Additionally, some cities, including San Jose, Mountain View, and Palo Alto, levy city transfer taxes that can add thousands to the seller's cost. Ask your agent about these before you negotiate your offer price. Verify totals before you list.
On a $1,500,000 purchase, for illustration only; actual costs vary by lender and transaction
What Does It Really Cost to Buy a Home in Silicon Valley?
Few housing markets compare to Silicon Valley on price. Buyers stay active throughout the year, while inventory has remained persistently constrained. As a result, multiple offers are common, sales routinely close above asking, and homes move fast. Expect competition at most price points.
For buyers considering this market, this calculator is built with Silicon Valley defaults: a $1,500,000 home price, 1.25% property tax rate, and the current high-cost conforming loan limit. With over 25 years of experience serving buyers and sellers across Santa Clara County and the greater Bay Area, Every type of market cycle in Silicon Valley has a pattern. The right preparation always makes the difference. See what my clients say about working with our team.
Property Taxes & Proposition 19
California property tax rates are not uniform. State law sets the baseline; local voter-approved assessments layer on top, and both can change. The California Board of Equalization notes that effective rates shift across Tax Rate Areas, counties, and individual parcels.
For the most current information specific to any property you are considering, verify directly with the appropriate county office: Santa Clara County Controller or San Mateo County Controller. If you are purchasing in another county, search for that county's Assessor or Controller office directly. Each maintains its own current tax rate information. We always recommend consulting a licensed CPA or tax attorney for guidance specific to your situation.
Proposition 19, effective April 2021, allows eligible homeowners (age 55+, severely disabled, or disaster victims) to transfer their existing property tax base to a replacement home anywhere in California, up to three times. Prop 19 also changed inherited property rules. The parent-child exclusion now requires the child to use the property as a primary residence.
Consult a Tax Professional
Proposition 19 carries significant complexity and the financial impact varies considerably by situation. Visit boe.ca.gov/prop19 for official guidance. Consult a licensed CPA and tax attorney before making any decisions based on tax implications.
Mello-Roos Special Tax Assessments
Newer developments in Silicon Valley, particularly in Milpitas, Morgan Hill, parts of South San Jose, and some Sunnyvale neighborhoods, often carry Mello-Roos special tax assessments on top of regular property taxes. These fund local infrastructure such as schools, roads, parks, and utilities in Community Facilities Districts. Ask about it before you offer.
Mello-Roos can add meaningfully to your monthly housing costs, and this amount is not reflected in the standard property tax rate. Additionally, always ask about Mello-Roos before purchasing in any newer subdivision. To factor it in, add the monthly amount to the HOA / Mello-Roos field in the calculator above. Budget for it from the start.
Mello-Roos is one of the most frequently overlooked costs by buyers new to Silicon Valley. Always verify the full tax burden on any property before making an offer.
Price ranges are illustrative of typical single-family home activity, per most recent MLS data
Explore Silicon Valley Communities
Each city offers a distinct character, school system, and price range. Use the calculator to compare monthly costs across price points before narrowing your search. Compare before you commit.
How Much Is a Mortgage Payment in Each Silicon Valley City?
The table below shows approximate single-family home price ranges and estimated monthly payments for each city we serve. Estimated payments use the current live rate from the ticker above with 20% down on a 30-year fixed loan, 1.25% property tax rate, and $2,400/year insurance, updating automatically whenever the rate changes. Use the calculator above to model any specific scenario.
| City | Typical Price Range | Est. Monthly Payment* | Income Needed (28%)* |
|---|---|---|---|
| Atherton | $5M – $12M+ | – | – |
| Los Altos Hills | $4M – $8M+ | – | – |
| Palo Alto | $2.5M – $5M | – | – |
| Los Altos | $2.5M – $4.5M | – | – |
| Saratoga | $2.5M – $5M | – | – |
| Cupertino | $2M – $3.5M | – | – |
| Los Gatos | $1.8M – $4M | – | – |
| Mountain View | $1.8M – $3M | – | – |
| Sunnyvale | $1.6M – $2.8M | – | – |
| Campbell | $1.4M – $2.2M | – | – |
| Santa Clara | $1.4M – $2M | – | – |
| San Jose | $1M – $2M | – | – |
| Fremont | $1.2M – $2.2M | – | – |
| Milpitas | $1.1M – $1.7M | – | – |
| Morgan Hill | $900K – $1.5M | – | – |
* Estimated payment and income figures calculated dynamically using the current live 30-year fixed rate from the Freddie Mac PMMS® ticker above, 20% down, 1.25% property tax rate, $2,400/year insurance, no HOA. Payment uses the midpoint of each price range. Income uses the 28% guideline. Figures update in real time when the rate changes, per most recent MLS data. Past market conditions do not guarantee future results.
Is It Better to Rent or Buy in Silicon Valley?
Tech professionals relocating to the Bay Area ask this constantly: "Does it make more sense to rent or buy?" No clean answer fits everyone. Timeline matters, and so does your financial picture, but the comparison really hinges on how ownership costs in Silicon Valley stack up against what you are currently paying to rent. Timeline is everything here.
Month to month, renting often looks cheaper. That changes over time. Every mortgage payment builds equity; Silicon Valley home values have shown meaningful appreciation over extended holding periods, and ownership carries tax advantages (the mortgage interest deduction, property tax deduction subject to SALT caps) that compound the financial case when the holding period is long enough.
A useful starting point: five or more years of planned residency, combined with the ability to carry the payment, has historically made buying the stronger financial move. Under three years? Renting usually makes more sense after accounting for closing costs and transaction fees. Use the mortgage calculator above to compare your projected monthly ownership cost against your current rent.
* Equity estimate based on principal paydown plus historical appreciation, for illustration only. Past performance does not guarantee future results.
What First-Time Buyer Programs Exist in California?
Price levels across Santa Clara and San Mateo counties put ownership out of reach for many first-time buyers without assistance. Even so, California runs several state-administered programs aimed at closing that gap, including deferred down payment loans and shared appreciation structures, for buyers who meet income and purchase price thresholds. Eligibility criteria vary by county.
CalHFA MyHome Assistance Program
The California Housing Finance Agency offers the MyHome program, providing deferred-payment down payment assistance as a junior loan. The loan carries no interest with no monthly payments. It becomes due when you sell, refinance, or pay off your first mortgage.
Income limits apply and vary by county. Visit CalHFA.ca.gov for current program details.
California Dream For All
The Dream For All program offers substantial down payment assistance through a shared appreciation loan structure. In exchange, you share a portion of future appreciation when you sell or refinance. Check CalHFA.ca.gov for current availability and application windows. Worth noting, the program opens for limited enrollment periods.
Reality Check for Silicon Valley
Not every buyer qualifies. Income limits frequently exclude higher-earning tech workers, and purchase price caps in many CalHFA programs sit below median prices in Sunnyvale, Santa Clara, or Mountain View. Worth knowing: Morgan Hill, Milpitas, and parts of South San Jose tend to fall within range more often.
A lender with CalHFA experience can run the numbers quickly. Use the calculator above to model what a reduced down payment does to your monthly payment first.
Silicon Valley Mortgage Calculator FAQ
How is a monthly mortgage payment calculated?
Lenders call it PITI: principal, interest, property taxes, and homeowners insurance. Those four pieces make up every payment. The principal-and-interest portion uses the standard amortization formula based on your loan amount, monthly rate, and total payment count. Taxes and insurance fold in monthly, with PMI and HOA added when applicable.
What is PMI and how do I avoid it?
Private Mortgage Insurance is required on conventional loans when the down payment is less than 20%. PMI typically costs 0.5–1.0% of the loan amount annually. However, avoid it by making a 20% or larger down payment, choosing a VA loan, or requesting removal once your equity reaches 20%.
What are closing costs in California?
Buyers in California typically set aside a few percent of the purchase price in one-time closing fees. That covers loan origination, appraisal, title insurance, escrow, and recording fees. On a Silicon Valley transaction, that range adds up fast. Budget for it alongside your down payment.
What is Mello-Roos and how does it affect my payment?
Mello-Roos is a special tax assessment common in newer Silicon Valley developments that funds local infrastructure. It can add meaningfully to monthly costs on top of regular property taxes. As a result, always ask before purchasing in any newer subdivision. Add it to the HOA field above.
What salary do I need to buy a home in Silicon Valley?
Required income varies significantly by city and current interest rates. Using the standard housing-cost ratio guideline, entry-level Silicon Valley markets require household incomes well into six figures, while premium cities push that number considerably higher. See the city comparison table above for live estimates across 15 cities, updated from the current Freddie Mac rate.
Should I choose a 30-year or 15-year mortgage?
A 30-year gives lower monthly payments and maximum cash-flow flexibility. A 15-year carries a lower rate and builds equity faster, but the payment is substantially higher on a large Silicon Valley loan. Still, the best choice depends on your income stability, goals, and planned ownership duration. Income stability makes the 15 viable.
What is the difference between conforming and jumbo loans?
Conforming loans stay within current FHFA limits, with a higher ceiling for high-cost areas like Santa Clara County. Exceed that ceiling and the loan becomes a jumbo mortgage, requiring stronger credit, a larger down payment, and more thorough income documentation. In Silicon Valley, jumbo financing is the norm. Full comparison above.
How do property taxes work in California under Proposition 19?
According to the California Board of Equalization, property tax rates are governed by state law and local voter-approved assessments, and can change. Estimated effective rates vary by property and location. California law also allows eligible homeowners to transfer their property tax base to a replacement home anywhere in the state.
Verify current rules and eligibility at boe.ca.gov. Always confirm current rates and programs with your county's Assessor or Controller office: Santa Clara County or San Mateo County. For other counties, search directly for that county's official Assessor or Controller website.
Should I refinance my mortgage?
Refinancing makes sense if you can secure a meaningfully lower rate, plan to stay past the break-even point, or want to switch from adjustable to fixed. From there, divide your closing costs by monthly savings to find the break-even timeline in months.
Is it better to rent or buy in Silicon Valley?
Five or more years and can you carry the payment? Buying has historically built significant equity in this market. Under three years, renting usually makes more financial sense once you factor in closing costs and transaction fees on both sides. Timeline drives the math; see the full analysis above.
What are CalHFA first-time buyer programs?
Two state programs reduce your down payment burden. MyHome Assistance provides deferred down payment help as a junior loan with no monthly payments due until you sell or refinance. Dream For All shares your future equity instead. Income limits and price caps vary by county and program cycle, so check CalHFA.ca.gov for current availability windows and the full program details above.
What credit score do I need to buy a house?
Conventional loans generally require 620 or better. FHA loans go down to 580 with 3.5% down, and as low as 500 with 10% down, though few lenders go that far. VA loans carry no official floor, though most lenders still want to see 620. Score matters beyond qualification: a higher number typically means a lower rate, which compounds into real savings over a 30-year loan.
How does extra monthly principal payment affect my loan?
Making additional principal payments each month reduces your balance faster, cuts total interest paid substantially, and shortens your payoff timeline. Additionally, use the Extra Monthly Principal field in the calculator above to see exactly how much you save and how many years you gain. Even small extra amounts matter.
Serving Santa Clara County, San Mateo County & the Greater Bay Area · 25+ Years of Local Expertise
This page is for informational purposes only and does not constitute financial, tax, or legal advice. Mortgage estimates are illustrative. Consult a licensed lender for accurate figures.
MLS data used for illustrative estimates only. Not guaranteed.
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