Mortgage calculator

This calculator shows an estimate for your loan payment (principal + interest). In real life, most homeowners pay a little more each month because of a few “extras” that often get bundled into the payment.

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Common add-ons to plan for (rough ballparks):

• Property tax: In Contra Costa it’s typically around ~1.1%  of the home’s assessed value per year. Many areas in the county end up closer to ~1.2%–1.4% once local bonds are included, but it varies by neighborhood/TRA (Tax Rate Area). 

• Homeowners insurance: Often around $100–$200+ per month, depending on coverage and location (and premiums have been changing in CA).

• HOA dues (if applicable): Can range from several hundred dollars or higher per month depending on the community and amenities.

• PMI (if your down payment is under 20% on a conventional loan): Commonly 0.46%–1.50% of the loan amount per year (roughly $30–$70/month per $100,000 borrowed for many buyers).

• Sometimes you need flood or earthquake insurance, depending on the area

• Utility Expenses: You should consider an estimated monthly cost for essentials like electricity, gas, water, sewer, trash, and internet. Utility costs can vary by season, home size, and usage.

• Escrow: Escrow is a “savings bucket” your lender may collect each month to help pay property taxes and homeowners insurance when they come due. Instead of paying those bills in one big lump sum, escrow spreads them out across the year.

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