LegibleTax
Annual tax worksheet

Contra Costa County

Enter your numbers in each section. Anything you leave blank stays an estimate.

Income tax

Annual income
Filing status
Kids at home

Federal Child Tax Credit — $2,000 per child under 17.

Federal income tax
$29,043
19.36% effective · 2024 · single

Computed on gross income, less the federal Child Tax Credit ($2,000 per child under 17, phasing out above $200k single / $400k married). Still simplified — it ignores the standard deduction, other credits, the refundable-credit cap, and payroll (FICA) taxes.

See the calculation →
California income tax
$10,602
7.07% effective · 2023 · single

An additional 1% Mental Health Services surcharge applies to taxable income over $1,000,000 (not modeled). Brackets shown are the 2023 tax-year single schedule; verify the current year at the source.

See the calculation →
Subtotal $39,645

Sales tax

Taxable purchases

Yearly spending subject to sales tax

California sales tax est.
$2,900
7.25% of purchases

Statewide base rate. Local district taxes (added on county pages) stack on top.

See the calculation →
Contra Costa district sales tax est.
$600
1.50% of purchases

Local district rate on top of California's 7.25% base — most Contra Costa locations land near 8.75% combined, though some cities reach 10.75%.

See the calculation →
Subtotal $3,500

Gasoline tax

Gas

Gallons of gas a year (~500 typical)

Federal gasoline excise est.
$92
18.4¢/gal

A flat federal excise, unchanged since 1993 and not indexed to inflation: 18.4¢ per gallon (18.3¢ to the Highway Trust Fund plus 0.1¢ for leaking underground storage tanks). It applies in every state; states add their own.

See the calculation →
California gasoline excise est.
$317
63.4¢/gal

California's motor vehicle fuel excise, adjusted every July 1 for inflation — 63.4¢ per gallon effective July 1, 2026 (up from 61.2¢). State/district sales tax on fuel and programs like Cap-and-Trade and the Low Carbon Fuel Standard add more at the pump but aren't modeled here.

See the calculation →
Subtotal $409

Property tax

Home value

Your home's market value

Property tax (Contra Costa County) est.
$5,423
1.10% of home value (after $7,000 off)

Nominal rate applied to assessed value. The 1% Prop 13 general levy is fixed statewide; local voter-approved debt varies by Tax Rate Area, so the countywide average (~1.10%) is used here. Proposition 8 allows a temporary reduction when market value falls below the factored assessed value.

See the calculation →

What's left

Federal incomeState incomeSalesGasolinePropertyTake-home
Total tax
estimate — add home & spending
$44,710–$56,330
Take-home$93,670–$105,290

32.65% of your income goes to taxes.

That's $48,977 to federal, state, and local governments this year; you keep $101,023. The gray slice of the bar is what's actually yours.

The same numbers elsewhere

Your inputs, other places — tap to see the breakdown.

About Contra Costa County

Contra Costa County, California

Contra Costa County anchors the northern East Bay of the San Francisco Bay Area. Here's what actually comes out of your pocket, and why.

What you pay

  • Property tax — about 1.10% of assessed value. The floor is the 1% Proposition 13 general levy; voter-approved bonds add a little more depending on where in the county you are.
  • Sales tax — about 8.75% combined (California's 7.25% base plus a ~1.5% local district rate). A few cities run higher.
  • Income tax — California's progressive state brackets, stacked on federal.

Property tax, specifically (Proposition 13)

Your assessed value is set at your purchase price and can rise at most 2% per year — it does not track the market upward. It only resets on a change of ownership or new construction.

The flip side matters when prices fall: under Proposition 8, if your home's market value drops below its factored assessed value, you can request a temporary reduction — a lower assessment means a lower tax bill. That's the opening LegibleTax helps recent buyers find and file.