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How Much to Set Aside for Small Business Taxes in San Diego? (Trades & Construction Guide)

If you’re a contractor, plumber, electrician, HVAC company, or trade business owner in Carlsbad, Vista, Oceanside, or anywhere in San Diego County, one of the most common questions is:

“How much should I be setting aside for taxes?”

If you don’t plan ahead, tax season can wipe out your cash flow — especially in construction where income is inconsistent and large project payments hit all at once.

Let’s break this down simply and practically.


1️⃣ The Short Answer: Start With 25%–35%

For most small businesses in the trades structured as:

  • Sole Proprietor
  • LLC
  • S-Corporation

You should generally set aside:

✅ 

25%–35% of your net profit

Not revenue.

Not total deposits.

Net profit (after expenses).

Why such a big range? Because it depends on:

  • Your total income (business + personal)
  • Whether you’re an S-Corp
  • California state taxes
  • Self-employment taxes
  • Whether you have payroll
  • Other deductions and credits

If you’re in California, your tax burden is higher than many other states — which is why planning matters even more here in San Diego.


2️⃣ What Taxes Are You Actually Paying?

If you’re in construction or the trades, you’re typically paying:

Federal Taxes

  • Income tax
  • Self-employment tax (15.3%) if not on payroll

California Taxes

  • State income tax
  • $800 minimum franchise tax (LLCs & Corps)

Payroll Taxes (if you have employees)

  • Employer portion of Social Security & Medicare
  • California EDD taxes

For many trade business owners in San Diego County earning between $150K–$400K in profit, the effective combined tax rate often lands in that 28%–35% range.


3️⃣ Real Example: San Diego Contractor

Let’s say you run a remodeling company in Carlsbad:

  • Revenue: $1,200,000
  • Expenses: $850,000
  • Net Profit: $350,000

If you’re an S-Corp paying yourself:

  • $120,000 W-2 salary
  • $230,000 distributions

You could easily owe:

  • $60,000–$100,000+ in total federal + CA taxes

That’s why tax planning is critical in the trades — especially when jobs close at different times of the year.


4️⃣ The Smart Way to Set Money Aside

Here’s what we recommend for construction and trade businesses in San Diego:

Step 1: Open a Separate “Tax Savings” Account

Every time money hits your operating account:

  • Transfer 25–35% of net profit to taxes
  • Do it automatically if possible

Step 2: Pay Quarterly Estimated Taxes

Due:

  • April 15
  • June 15
  • September 15
  • January 15

Quarterly payments prevent penalties and avoid a massive April surprise.

Step 3: Don’t Wait Until Year-End

In construction, income is uneven. A big December project completion can spike taxable income dramatically.

We recommend reviewing:

  • Profit & Loss monthly
  • Cash flow monthly
  • Tax projections quarterly

5️⃣ Why Trades & Construction Businesses Get in Trouble

In San Diego construction, we see the same patterns:

  • Owners spend based on bank balance
  • Large material deposits distort profit
  • Payroll fronting eats cash
  • No separation between operating cash and tax money
  • No mid-year tax projection

Profit ≠ Cash

And Cash ≠ What You Can Spend

If you’re not job-costing properly in QuickBooks, your tax planning will always be reactive.


6️⃣ Should You Be an S-Corp?

Many contractors and trade business owners in North County San Diego benefit from an S-Corp election once profit exceeds ~$80K–$100K.

Why?

  • It can reduce self-employment tax
  • Creates cleaner payroll structure
  • Improves tax efficiency

But it must be structured properly — including reasonable compensation and clean books.


7️⃣ Local Tax Planning Matters in San Diego

California is not Texas or Nevada.

Between:

  • High state income tax
  • Franchise tax
  • Payroll compliance
  • Sales tax considerations (for certain materials)

Local expertise matters — especially for construction and service-based businesses operating in Carlsbad, Vista, Oceanside, Encinitas, and surrounding areas.

8️⃣ A Simple Rule of Thumb for 2026

If you’re a trade business in San Diego County:

SituationRecommended Set-Aside
New business under $100K profit25%
$100K–$300K profit28–32%
$300K+ profit32–35%

If unsure — start high.

It’s better to have extra in your tax account than not enough.


Final Thoughts

If you’re a plumber, electrician, GC, HVAC company, or remodeling contractor in San Diego and you’re asking:

“Why do I make good money but feel broke at tax time?”

It’s usually one of three things:

  1. No tax reserve system
  2. No job costing
  3. No quarterly planning

Setting aside the right percentage is step one.

Having clean, accurate bookkeeping is step two.

Strategic tax planning is step three.


If you’re a construction or trade business in Carlsbad or North County San Diego and want help building a predictable tax plan, that’s exactly what we do at Accounting Fresh.

Reliable. Responsive. Local.


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