Don't Forget State Income Taxes

Long-term investors often focus exclusively on federal taxation, calculating after-tax returns using the federal 20% long-term capital gains rate. However, most states layer additional income taxes on top—sometimes dramatically. A Californian in the top bracket faces 37% federal + 13.3% state = 50.3% combined tax on capital gains. A New Yorker faces 37% + 10.9% = 47.9%. Even in moderate states like Pennsylvania, 20% + 3.07% = 23.07% applies.

For wealthy investors with decades-long holding periods, state tax differences can represent hundreds of thousands of dollars in cumulative lifetime taxes. Understanding state-tax rules and planning strategically—including considering relocation for tax harvesting years—is essential for maximizing after-tax wealth.

Quick definition: State income taxes are levied by individual states on resident income, including capital gains, dividends, and interest. Some states have no income tax (Texas, Florida, Nevada); others tax all income equally (California, New York); and a few have preferential capital gains rates (North Carolina, South Carolina). State taxes dramatically affect after-tax returns, particularly for high-income residents of high-tax states.

Key Takeaways

• State income tax rates range from 0% (no-income-tax states) to 13.3% (California), potentially doubling the combined federal+state tax burden on capital gains.
• Combined federal (37%) + state (13%) = 50%+ effective tax rate in high-tax states; a $1 million gain costs $500,000 in taxes.
• Some states tax capital gains as ordinary income (California, New York, Oregon); others apply preferential rates or have no income tax.
• Timing relocation strategically—moving before a gain-harvesting year or before retirement—can save $50,000–$100,000+ in cumulative taxes.
• Even within states, local income taxes (Pennsylvania, Ohio, Indiana) add an additional 0.5–3.5% layer of taxation.
• Tax-loss harvesting value is 25-50% higher in high-tax states, making it a priority for residents of California, New York, and similar states.

State Tax Rate Variation

The U.S. has extreme variation in state income taxation:

No income tax (0%):

• Texas, Florida, Nevada, Wyoming, South Dakota, Tennessee, New Hampshire (interest and dividends only), Alaska

Low state income tax (1-5%):

• Colorado (4.6%), Arizona (3-4.5%), Pennsylvania (3.07%), Tennessee (0% on investment income), Utah (up to 4.95%)

Moderate state income tax (5-10%):

• Illinois (4.95%), Massachusetts (5% + 5.75% on capital gains), North Carolina (4.99%), Michigan (4.25%)

High state income tax (10%+):

• California (13.3% top rate, no preferential capital gains rate), New York (10.9%), Hawaii (11%), Vermont (8.75%), Washington DC (10.75%)

Unusual structure:

• Washington and Oregon: No income tax, but separate capital gains taxes (7% in Washington, 9.9% Oregon on long-term gains above $250,000)
• Massachusetts: 5% ordinary rate, 5.75% on capital gains (slightly preferential)
• North Carolina and South Carolina: Preferential rates on capital gains (lower than ordinary rates)

A resident of California earning $1 million in capital gains pays $372,000 in federal tax (37%) + $133,000 in state tax (13.3%) + $37,800 in NIIT (3.8% on investment income) = $542,800 total (54.3% combined rate).

The same person in Texas earning $1 million in capital gains pays $372,000 federal + $0 state + $37,800 NIIT = $409,800 total (40.98% combined rate).

Tax savings from living in Texas: $133,000 on a single $1 million gain, or 3.2 percentage points of return.

Over a 25-year career with multiple gain-harvesting events, this difference compounds to $500,000–$2 million in additional wealth.

Long-Term Capital Gains Treatment Across States

States vary in how they tax long-term capital gains:

Same rate as ordinary income (California, New York, Oregon, Illinois):

• Capital gains face the full state income tax rate, no preferential treatment.
• High-income residents face combined federal (37%) + state (10%+) = 47%+ rate.

Preferential rates (Massachusetts, North Carolina, South Carolina):

• Long-term capital gains taxed at a lower rate than ordinary income.
• Example: North Carolina's ordinary rate is 4.99%, but capital gains are taxed at 4.75% (slightly lower).

Exemptions or special treatment (Washington, Oregon):

• Washington: No income tax, but 7% capital gains tax on long-term gains over $250,000.
• Oregon: No capital gains tax for most; 9.9% only on high earners (income >$125,000 + gains >$250,000 household threshold).

Carve-outs for specific gains (New Hampshire, Tennessee, Alaska):

• New Hampshire: No income tax on wages, but 5% tax on interest and dividends (not capital gains).
• Tennessee: No income tax on wages, but 5% on dividends and interest (not capital gains).

For a long-term investor realizing capital gains, living in a state with preferential or no capital gains taxation is significantly advantageous. The difference between a 37% federal rate and a 37% + 13% combined rate is 3.2 percentage points annually—compounding into massive wealth differences over decades.

Local Income Taxes

In addition to state income taxes, several states allow local (city or county) income taxes:

Pennsylvania: 0.5–3.5% local income tax (varies by municipality), plus 3.07% state tax.

Ohio: 0.5–2.5% local income tax, plus state income tax.

Indiana: Up to 3.8% local income tax, plus state income tax.

Kentucky and Maryland: Small local income taxes in some jurisdictions.

A resident of Pittsburgh, Pennsylvania might face:

• Federal: 37%.
• State: 3.07%.
• Local (Pittsburgh): 3.1%.
• NIIT: 3.8%.
• Combined: 47.0% on capital gains.

Combined, state and local taxes can add 5-10% to federal rates, substantially reducing after-tax returns.

Strategic Relocation for Tax Harvesting

One advanced strategy is temporarily relocating to a low-tax state during a planned gain-harvesting year. If you're planning to realize $200,000 of capital gains, moving to Texas or Nevada for that year saves $15,000-$25,000 in state taxes (depending on where you came from).

Example:

A California resident (13.3% state rate) plans to harvest $200,000 of gains in Year 1.

Without relocation:

• Federal tax: $200,000 × 37% = $74,000.
• State tax: $200,000 × 13.3% = $26,600.
• Total tax: $100,600 (50.3% effective rate).
• After-tax proceeds: $99,400.

With one-year Nevada relocation:

• Federal tax: $200,000 × 37% = $74,000.
• State tax: $0 (Nevada has no income tax).
• Total tax: $74,000 (37% effective rate).
• After-tax proceeds: $126,000.
• Tax savings: $26,600.

This requires:

1. Establishing Nevada residency (rental home, driver's license, voter registration).
2. Timing the relocation to include the harvest year.
3. Returning to California afterward.

For high-net-worth investors harvesting $500,000+ in gains, this strategy can save $50,000–$100,000+ per year, justifying the administrative cost of temporary relocation.

Tax-Loss Harvesting Value in High-Tax States

The value of tax-loss harvesting is amplified in high-tax states. A $20,000 loss is worth:

• In Texas (0% state): $20,000 × 37% federal = $7,400.
• In California (13.3% state): $20,000 × (37% + 13.3%) = $10,060.
• Difference: $2,660 more valuable in California.

Over a 30-year investment career, a California investor can accumulate $100,000+ in loss harvests, translating to $30,000–$40,000 in tax savings vs. a Texas investor harvesting the same losses.

This is why California residents particularly benefit from disciplined tax-loss harvesting and robo-advisors that automate the process.

Real-World Examples

Scenario 1: State Tax Impact Over a Lifetime

Two identical twins, each earning $1 million in career income (wages) and accumulating a $2 million portfolio of appreciated securities (average 10% annual gains for 30 years).

Twin A: Lives in California

• Average annual capital gains realized: $200,000 (from rebalancing and distributions).
• Average annual tax: $200,000 × (37% federal + 13.3% state) = $100,600.
• Over 30 years: $100,600 × 30 = $3,018,000 in cumulative taxes.

Twin B: Lives in Texas

• Same $200,000 in annual capital gains realized.
• Average annual tax: $200,000 × 37% federal = $74,000.
• Over 30 years: $74,000 × 30 = $2,220,000 in cumulative taxes.

Difference: Twin B pays $798,000 less in cumulative taxes purely due to state tax differences, or approximately 27% more after-tax wealth.

Over 30 years at 7% compounding, this $798,000 difference compounds into $3-5 million of additional terminal wealth difference.

Scenario 2: Relocation Before Retirement

A 60-year-old California resident with $1 million in appreciated securities plans to retire at 65, realizing $100,000-$150,000 in annual gains for five years.

She relocates to Nevada at age 60 (before retirement), establishing residency.

Over five years:

• Unrelocated (CA): 5 years × $125,000 average gains × 50.3% tax = $314,375 in taxes.
• Relocated (NV): 5 years × $125,000 average gains × 37% tax = $231,250 in taxes.
• Tax savings: $83,125 over five years.

The administrative cost of relocation (temporary housing, legal fees, etc.) is ~$15,000-$25,000, netting $60,000-$70,000 in tax savings.

Scenario 3: Tax-Loss Harvesting Priority in California

A California investor with a $500,000 taxable portfolio experiences a 20% market decline in Year 1, creating $100,000 in unrealized losses.

They harvest the losses strategically:

• Tax savings at California rates (37% federal + 13.3% state): $100,000 × 50.3% = $50,300.

Compare this to a Texas investor with the same portfolio and losses:

• Tax savings at Texas rates (37% federal): $100,000 × 37% = $37,000.
• Difference: California investor's loss harvest is worth $13,300 more.

This underscores why California residents should prioritize tax-loss harvesting; the value per dollar of loss harvested is 36% higher than in Texas.

Common Mistakes

1. Ignoring state taxes when calculating after-tax returns. If you only account for federal 20% capital gains rate, you're missing 10%+ in states like California. This understates true after-tax costs by 50%+.

2. Not harvesting losses aggressively in high-tax states. The after-tax value of a loss harvest is 50%+ higher in California than Texas. Prioritize harvesting if you live in a high-tax state.

3. Failing to relocate before a major gain-realization event. If you're planning a Roth conversion, business sale, or concentrated-stock sale, relocating temporarily can save $50,000–$200,000+ in state taxes. Most people don't even consider this.

4. Not accounting for local income taxes. A Pittsburgh resident focusing only on Pennsylvania state tax (3.07%) and federal (37%) misses local tax (3.1%), resulting in a 43.2% combined rate, not 40%. Small mistakes multiply.

5. Assuming Social Security and other income won't be taxed by the state. Some states (Tennessee, New Hampshire, Alaska) have low or no income tax on wages but do tax investment income or retirement withdrawals differently. Understanding your state's specific rules is critical.

FAQ

Q: If I move to Texas to establish residency, when am I actually a Texas resident for tax purposes? A: Generally, the year you establish residency (rental home, driver's license, voter registration, intention to remain). The IRS looks at substance, not just form. If you move to Texas, establish ties, and intend to stay, you're a resident immediately. However, if you're going to be gone 6+ months per year, your former state may contest your residency. Document your intent carefully.

Q: Can I move to a no-tax state just for gain harvesting, then move back? A: Yes, as long as you establish genuine residency in the new state (at least part of the year, documented ties). However, your former state may challenge your departure date and may still claim you as a resident. The challenge is most common if you maintain property, family ties, or employment in the old state. Consult a cross-border tax attorney before major relocations.

Q: How do local income taxes work if I move states? A: Local income taxes apply where you live and work. If you live in Pittsburgh but work in Philadelphia, different rules apply. Generally, your state of residence for the year determines which state and local taxes apply. Document your residence carefully.

Q: Can I claim state tax credits in my new state if I paid state tax in my old state? A: In some cases, yes, through reciprocal tax agreements or credits. However, this is state-specific. If you relocate mid-year, you may owe taxes to both states and can claim a credit in one for taxes paid in the other. Consult a CPA.

Q: Does the step-up in basis apply to state taxes? A: No. The step-up in basis is federal. Some states do not recognize the step-up and may tax inherited gains based on the deceased's original cost basis. This is rare but critical to understand in high-tax states like California. Consult an estate attorney.

Q: Should I time my Roth conversion to a low-income year if I live in a high-tax state? A: Yes. A Roth conversion is taxable in the year converted. If you're in a 0% or 12% federal bracket and a 0-3% state bracket (total 0-15%), converting is extremely favorable. In California, the same conversion faces 37% + 13.3% = 50.3%, making the decision to convert marginal. Consider timing conversions in low-bracket years.

Related Concepts

• State income tax: Tax levied by a state on income of residents and nonresidents earning income in the state.
• Capital gains tax: State tax on long-term capital gains; some states tax at ordinary income rates, others at preferential rates.
• Local income tax: Tax levied by a municipality or county on residents' income; varies by jurisdiction.
• Tax residency: Domicile for tax purposes; determines which state has primary tax jurisdiction on your income.
• Tax reciprocity: Agreement between states allowing residents of one state to claim credits for taxes paid to another (rare).

Summary

State and local taxes dramatically affect long-term after-tax returns, with combined federal+state rates ranging from 37% (Texas) to 50%+ (California). For investors with significant capital gains or early-retirement plans, understanding state tax rates and planning strategically is essential.

Options include:

1. Living in a low-tax state permanently (saves $500,000–$2 million over a lifetime).
2. Temporarily relocating during gain-harvesting years (saves $20,000–$100,000+ per year).
3. Prioritizing tax-loss harvesting (higher value in high-tax states).
4. Timing major income realization (Roth conversions, business sales) to low-tax-bracket years.

Long-term investors who ignore state taxes are leaving hundreds of thousands of dollars on the table over a lifetime. Make state taxes part of your comprehensive tax strategy.

Next

Read the next article: Planning Around Changing Tax Laws