California mortgage calculator for high-price markets, Prop 13 taxes, and wildfire-zone insurance
California home prices sit far above the national median, so a generic mortgage estimate almost always understates the real monthly budget. This California mortgage calculator helps buyers in Los Angeles, San Francisco, San Diego, San Jose, and Sacramento model principal and interest against the costs that actually define a California payment: Proposition 13 property taxes reassessed at purchase price, supplemental tax bills in year one, wildfire-zone homeowners insurance or California FAIR Plan coverage, HOA dues on condos and townhomes, and jumbo-loan pricing when the loan exceeds conforming limits in high-cost counties. Work through a realistic example — an $875,000 purchase with 20% down, roughly $580 per month in property tax, and about $290 per month in insurance — then adjust every input to match the county and neighborhood you are shopping in. Every estimate runs locally in your browser, and the educational guides below explain how Prop 13, Mello-Roos districts, and high-cost conforming limits change the math before you talk to a lender.
mortgage calculator california
California mortgage calculator
California home loan calculator
Interactive mortgage calculator
%
Real-time results
Monthly Principal & Interest
$2,781
Total Monthly Payment
$3,481
Total Interest Paid
$561,196
Total Loan Cost
$1,253,196
Monthly Breakdown
$700
Payment breakdown
Principal & Interest$2,781
Property Tax$420
Insurance$160
HOA$0
PMI$120
Los Angeles, San Francisco, and San Diego: why the same loan looks different in each city
A $700,000 loan at the same rate produces the same principal-and-interest payment everywhere, yet the all-in monthly cost diverges fast across California metros. In Los Angeles, buyers often face Mello-Roos or special-assessment districts in newer developments around Irvine and the Inland Empire, plus HOA dues on the condos that dominate entry-level inventory near job centers. San Francisco and San Jose buyers deal with the state's highest prices, where even conforming high-cost limits are routinely exceeded and jumbo pricing adds a premium, while HOA dues on city condos can rival a car payment. San Diego sits between the two, with strong VA-buyer demand near military bases and wildfire-zone insurance surcharges in inland suburbs like Poway and Escondido. Sacramento offers the closest thing to middle-market California, where a conforming loan still buys a single-family home and the tax-plus-insurance load is lighter. Use the calculator three times — once per metro with local tax, insurance, and HOA figures — and the cheapest sticker price is rarely the cheapest monthly payment.
Proposition 13 property taxes: the 1% rule, reassessment, and supplemental bills
California's Proposition 13 caps the base property tax rate near 1% of assessed value with annual assessment growth limited to about 2%, which sounds simple until you buy. On purchase, the home is reassessed to what you paid, so your tax base resets to the current market price while longtime neighbors keep older, lower assessments. Voter-approved local bonds and parcel taxes then stack on top of the 1% base, pushing the effective rate to roughly 1.1%–1.25% in many counties, and newer communities can add Mello-Roos special taxes of several thousand dollars a year for decades. Expect a supplemental tax bill in the first year covering the gap between the seller's old assessment and your new one. For calculator purposes, a sound starting assumption on an $875,000 purchase is about $580–$730 per month in property tax, and buyers in Mello-Roos districts should add the district's annual levy divided by twelve on top. Always confirm the exact effective rate with the county assessor before finalizing a budget.
Homeowners insurance in wildfire zones and the California FAIR Plan
Insurance is the California cost buyers underestimate most. Carriers have repriced wildfire risk aggressively, so homes near brush, canyons, or forested foothills — from the Oakland Hills to San Diego's backcountry to Riverside County — can face premiums two to four times the statewide average, frequent non-renewals, and requirements to carry California FAIR Plan coverage paired with a supplemental wrap policy. Even urban buyers feel the spillover as admitted carriers raise rates statewide. A reasonable calculator starting point is about $290 per month for a typical suburban home, rising to $400–$600 per month in designated high fire-severity zones, with brush-clearance and hardening discounts worth asking about. Because lenders escrow insurance with the mortgage payment, an insurance quote that arrives late can blow up a carefully planned debt-to-income ratio. Get an insurability quote at the same time as pre-approval, not after going under contract, and model the pessimistic premium in this calculator so the payment still works if the first quote is the one you keep.
Sacramento and inland markets: where conforming loans still work
Sacramento, Fresno, Bakersfield, and the Inland Empire are where California's conforming loan limits still cover typical purchases, which changes strategy. When the loan fits under the high-cost conforming ceiling for the county, buyers access standard conventional pricing, 3%-down conventional options for first-time buyers, and streamlined refinances later — none of which apply once a loan goes jumbo. In these markets, the calculator debate shifts from loan structure to escrow load: Central Valley buyers should weight property tax plus insurance heavily, since summer heat, aging roofs, and distance from fire stations all move premiums. Investors comparing Sacramento rentals against Bay Area appreciation plays should run both scenarios here with realistic vacancy and HOA inputs rather than best-case rents. The payment that matters is the escrowed one, and inland California rewards buyers who budget it honestly from the first showing.
Jumbo loans, high-cost conforming limits, and first-time buyer programs in California
Much of coastal California is a high-cost area where the conforming loan ceiling runs well above the national baseline — verify the current county figure with the FHFA before you shop, since 2026 limits reset annually and coastal counties like Los Angeles, Orange, San Francisco, San Mateo, and Santa Clara each publish their own ceiling. Loans above that line are jumbo: expect larger down payments, deeper reserve requirements, and rates that price slightly above conforming. First-time buyers have a genuine alternative path through CalHFA programs, which pair below-market first mortgages with down-payment assistance structured as deferred or forgivable second loans, plus the Mortgage Credit Certificate for qualifying households. FHA loans also remain relevant in lower-priced inland counties where the FHA ceiling covers the purchase. Model each path in the calculator — jumbo with 20% down versus conforming with assistance — and compare total monthly cost plus cash-to-close, because the lowest rate is not always the lowest burden.
Refinance math for California homeowners sitting on equity
California owners who bought before the rate cycle often hold substantial equity, which makes three refinance questions worth modeling: a rate-and-term refinance that lowers the payment, a cash-out refinance that funds renovations at mortgage rates instead of credit-card rates, and the break-even month where cumulative savings pass closing costs. Closing costs in California typically run 2%–5% of the loan amount, with title, escrow, and recording fees above national averages, so divide total costs by the monthly saving to find the break-even horizon — if you may sell or move before that month, the refinance loses money. Proposition 13 adds a wrinkle: refinancing never triggers reassessment, but cash-out appraisals and junior liens deserve the same scrutiny as any new debt. Run your current payment against the proposed one in the calculator with honest tax and insurance figures, and continue to the dedicated refinance page linked below for the full break-even framework.
FAQ
How much house can I afford in California with today's rates?
Start from the escrowed payment, not the loan amount: on an $875,000 purchase with 20% down, roughly $580 per month in property tax and $290 in insurance are typical planning figures before HOA. Lenders generally cap housing costs near 28% of gross income, so map that total payment to income on the affordability page before falling in love with a listing.
Does Proposition 13 keep my property taxes low when I buy?
No — Proposition 13 limits growth for existing owners, but your purchase reassesses the home to the price you paid. Budget from the purchase price at roughly 1.1%–1.25% effective including local bonds, plus any Mello-Roos levy, and expect a supplemental bill in year one.
Why are California homeowners insurance quotes so high in some areas?
Wildfire risk repricing means homes in high fire-severity zones can cost multiples of the state average to insure, sometimes requiring FAIR Plan plus wrap coverage. Get quotes during pre-approval and model the high quote in the calculator so your debt-to-income ratio survives the real premium.
Do I need a jumbo loan in Los Angeles or the Bay Area?
Only if your loan exceeds the county's high-cost conforming ceiling, which runs well above the national baseline in coastal counties. Check the current FHFA county limit first — staying under it unlocks standard conventional pricing and easier refinances, which is worth modeling against jumbo terms here.
Can first-time buyers get help with a California down payment?
Yes. CalHFA pairs first mortgages with down-payment assistance for qualifying buyers, and FHA loans with 3.5% down work in lower-priced counties. Compare the assisted monthly payment against a standard 20%-down quote in this calculator, including MIP or second-loan payments, before choosing.
When does refinancing make sense for a California homeowner?
When the monthly saving repays closing costs before you expect to sell — divide 2%–5% closing costs by the monthly saving for the break-even month. Refinancing never triggers Prop 13 reassessment, so the decision is purely about rate, costs, and how long you will hold the loan.
Mortgage Calculator California is a free, browser-based mortgage & home loans tool that gives you accurate mortgage calculator california results in seconds — with no account and no data uploaded to any server.
This particular page focuses on the california workflow of mortgage calculator california; use it alongside the related tools below to cover adjacent scenarios without switching sites.
Every input you enter is processed locally, so results appear instantly and your figures stay private. Preset examples give you a fast starting point, and the output updates live as you refine your numbers.
Last updated September 2026 · Reviewed by the LoanPay Logic editorial team
