Gaithersburg, MD vs San Diego, CA: Cost of Living

Which city costs less?

San Diego, CA has a modeled overall cost index 0.3% lower than Gaithersburg, MD.

Gaithersburg, MD · modeled 2BR rent: $2,140 / month
San Diego, CA · modeled 2BR rent: $3,360 / month

These are saved estimates, not current rental listings. Some cities use adjusted regional data. Your household budget can differ from the overall index. Sources and assumptions

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Cost of Living Comparison 2026

Compare Gaithersburg, MD and San Diego, CA using saved regional data and explicit budgeting assumptions. Rent estimates are not live listings. Change the salary below, then check the source notes before applying a result to your household.

Saved regional estimates · Sources and assumptions

Current salary in Gaithersburg, MD

Numbers update automatically as you type

Estimated extra cost: $25.51/month in San Diego, CA

$150,000 in your current city has a modeled equivalent of $150,306 in San Diego, CA

Regional cost estimates: Gaithersburg, MD uses Washington, DC. San Diego, CA uses San Diego-Chula Vista-Carlsbad, CA Metropolitan Area. Available city ZIP rent estimates are shown separately.

Overall Cost

↓ 0.3%

Less expensive

Monthly Impact

$25.51

Extra cost

Annual Impact

$306

Per year

Assumes 60% of current gross income goes to living costs. The headline uses the category budget below; taxes, moving costs and savings goals are excluded.

Gaithersburg, MD

Population:70K

Cost Index:

144.4

100 = national average

Typical Home:$428K

San Diego, CA

Population:1387K

Cost Index:

144.0

100 = national average

Typical Home:$980K

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Gaithersburg, MD

The Old Line State

70K

Population

State Tax

Yes

Located in Maryland, this city has a population of 70K residents.

San Diego, CA

The Golden State

1.4M

Population

State Tax

Yes

Climate

Semi-arid Mediterranean

Notable Facts

•Year-round perfect weather
•Major military presence
•Biotech hub

Major Industries

MilitaryTechnologyTourismBiotechnology

Cost Breakdown by Category

Estimated monthly spending: Gaithersburg, MD vs San Diego, CA

Assumes 60% of your current gross income is spent on these categories. The headline and totals use this same budget. Rent estimates below are separate reference data. Rounded amounts may differ by $1.

Category	Gaithersburg, MD	San Diego, CA	Difference	Change
Transportation	$1,221/mo	$1,071/mo	↓ $150less	12.3%
Other	$1,182/mo	$1,290/mo	↑ $108more	9.1%
All Utilities	$338/mo	$432/mo	↑ $94.43more	28.0%
Housing	$3,622/mo	$3,562/mo	↓ $60.00less	1.7%
Groceries	$717/mo	$736/mo	↑ $18.56more	2.6%
Healthcare	$420/mo	$435/mo	↑ $15.09more	3.6%

Transportation

↓ 12.3%

Gaithersburg, MD

$1,221

San Diego, CA

$1,071

Difference

$150

less

Other

↑ 9.1%

Gaithersburg, MD

$1,182

San Diego, CA

$1,290

Difference

$108

All Utilities

↑ 28.0%

Gaithersburg, MD

$338

San Diego, CA

$432

Difference

$94.43

Housing

↓ 1.7%

Gaithersburg, MD

$3,622

San Diego, CA

$3,562

Difference

$60.00

less

Groceries

↑ 2.6%

Gaithersburg, MD

$717

San Diego, CA

$736

Difference

$18.56

Healthcare

↑ 3.6%

Gaithersburg, MD

$420

San Diego, CA

$435

Difference

$15.09

🏠Rent Comparison

Studio

From$1,860

To$2,565

↑ $705

1 Bed

From$1,920

To$2,755

↑ $835

2 Bed

From$2,140

To$3,360

↑ $1,220

3 Bed

From$2,705

To$4,475

↑ $1,770

Gaithersburg, MDZIP-level data

1BR range: $1,870–$1,970/mo

San Diego, CAZIP-level data

1BR range: $1,980–$3,690/mo

💡 Note: HUD Fair Market Rents estimate 40th-percentile gross rents, including most tenant-paid utilities. City ZIP summaries are medians of those estimates, not market median rents. Actual prices vary by neighborhood, amenities, and condition. Source: HUD Small Area Fair Market Rents FY2026.

$7,500

Monthly in Gaithersburg, MD

$7,526

Monthly in San Diego, CA

$25.51

Difference

Home Values

Gaithersburg

San Diego

$428K

Median Value

$980K

↓ -1.1%

YoY Change

↓ -3%

↑ +22.2%

5-Year Change

↑ +37.4%

$384K - $472K

Price Range

$598K - $2.01M

Homes in San Diego are 129% more expensive than Gaithersburg

Calculate payment - Gaithersburg Calculate payment - San Diego

Source: Zillow Home Value Index (ZHVI), January 2026

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings

↓ $3.4K

More taxes

Monthly Difference

$281

Less take-home

Effective Rate Diff

2.2%

Rate difference

Gaithersburg, MD

Federal Income Tax

Effective: 18.9%

$25.5K

Maryland State Tax

Effective: 4.8%

$7.3K

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 29.5%

$44.3K

Take-Home Pay

$8,811/month

$105.7K

San Diego, CA

Federal Income Tax

Effective: 18.9%

$25.5K

California State Tax

Effective: 7.1%

$10.6K

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 31.8%

$47.6K

Take-Home Pay

$8,530/month

$102.4K

Additional Tax Information

Gaithersburg, MD Tax Rates

Sales Tax:6.0%

Property Tax:1.1%

San Diego, CA Tax Rates

Sales Tax:10.5%

Property Tax:0.8%

💡 Note: Tax calculations are estimates based on 2024/2025 tax brackets for single filers with standard deduction. Actual taxes may vary based on filing status, deductions, credits, and local variations.

🚶 Walkability

Modeled road attributes, not a safety assessment. Methodology and limitations

Gaithersburg, MD: No data yet

San Diego, CA

21/100

4.9% sidewalk tags · 12.5% cycling tags

Environment

Gaithersburg

San Diego

45 Good

Air Quality

71 Moderate

63.7%

Good Air Days

12.8%

98 High

Climate Risk

100 Very High

🌊🌀🌡

Top Hazards

🔥🌊🌡

▲+2.9°F

2050 Outlook

▲+2.1°F

27 days

Heat Days >95°F

1 days

▲+2.9°F

2050 Outlook

▲+2.1°F

27 days

Heat Days >95°F

1 days

Before moving from Gaithersburg, MD to San Diego, CA

Use this comparison to shortlist a move, then check the costs that depend on your household.

Compare actual homes. Get current quotes in San Diego, CA for the same bedroom count and included utilities as your home in Gaithersburg, MD. Add parking, deposits, insurance and any overlapping leases. The rent estimates above are a starting point, not available listings.
Confirm your income. Check your expected pay with your employer, including any location adjustment. Use “Different salary at destination?” above to compare two incomes. The budget model excludes taxes and one-time moving costs; it is not a take-home-pay calculation.
Price your daily routine. Check the commute from a specific address to work, school or childcare. Add household expenses missing from this model, such as childcare, debt payments and medical needs. Verify local services before signing a lease.
Plan the transition. Get moving quotes and budget for travel, setup costs and time off. Open your Gaithersburg to San Diego moving checklist to organize the tasks and timing.

Still choosing a destination? Explore cities similar to San Diego, CA by cost, housing, population and region.

Frequently Asked Questions: Gaithersburg, MD vs San Diego, CA

How do the cost estimates for Gaithersburg, MD and San Diego, CA compare?

San Diego, CA has a modeled overall cost index 0.3% lower than Gaithersburg, MD. This is a broad model comparison, not a survey of today's prices or a forecast of your household spending. Some cities use adjusted regional fallback data.

What does the equivalent salary mean?

At a $150,000 salary in Gaithersburg, MD, the model estimates $150,306 in San Diego, CA. It allocates 60% of gross income to the origin city’s category budget and applies each destination category’s relative cost. The equivalent salary adds the total category difference to your income. The monthly difference is the same category difference divided by 12; it is not take-home pay or guaranteed savings. Household size, childcare and your actual lease are not inputs to this calculation.

What rent estimates are available for Gaithersburg, MD and San Diego, CA?

The modeled two-bedroom rents are $2,140/month in Gaithersburg, MD and $3,360/month in San Diego, CA. Where available, the source is a city median of HUD FY2026 ZIP-level estimates; otherwise a saved metro table is used. City adjustments may also apply. These are not asking rents or available listings. Compare actual properties with the same bedroom count and included utilities.

How should I use this comparison before moving?

Use it to shortlist locations, then replace modeled costs with a current housing quote, employer-confirmed income, commute costs, insurance and your household's other expenses. Add one-time moving costs separately. Source years differ and the saved datasets are not a live price feed. Read the methodology for the formulas and fallback rules.

💰 See how taxes change too — compare take-home pay between Maryland and California on TaxTakeHome.com