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HEAD-TO-HEAD TAX COMPARISON · 2026

COUNTRY A South Dakota VS COUNTRY B Colorado

Side-by-side analysis of income tax, effective rates, and take-home pay for South Dakota and Colorado in 2026.

Daniel · CountryTaxCalc Updated June 2026 Tax Comparison 2026
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OVERVIEW
South Dakota and Colorado present a nuanced no-income-tax vs low-income-tax comparison, complicated by a significant property tax inversion. South Dakota has no income tax — prohibited by its state constitution — while Colorado imposes a 4.4% flat rate (reduced from 4.55% in 2022), partially offset by TABOR refunds of approximately $800 per filer annually. However, South Dakota's property tax averages approximately 1.14% — more than double Colorado's approximately 0.55%, which is one of the lowest in the US. At $100,000 income with a $300,000 home: South Dakota saves $4,400 in income tax but pays approximately $1,770 more in property tax, for a net SD advantage of approximately $2,630 before accounting for Colorado's TABOR refund (which adds another ~$800 back to Colorado residents). When TABOR is included, South Dakota's net income + property tax advantage is approximately $1,830/year at $100K. At higher incomes ($300K+), the income tax gap grows while the property tax differential stays constant — South Dakota's advantage becomes much larger. South Dakota also holds a sales tax edge: SD's combined average of ~6.4% vs Colorado's ~7.5%. For high earners and trust planning, South Dakota's income tax elimination and world-class trust laws make it the dominant choice over Colorado. For modest-income homeowners focused on total burden, Colorado's extremely low property tax and TABOR refunds reduce the gap significantly.
Section 01

The Big Picture

Top-line rates and effective take-home for a typical earner — including income tax, social contributions, and applicable surcharges.
🦅
COUNTRY A
South Dakota
TAX RATE
0%
No Income Tax — Premier Trust Jurisdiction With Moderate Property Tax
No income tax (constitutionally prohibited since 1889); no capital gains tax; 4.2% state sales tax (~6.4% combined average); property tax ~1.14% average; no estate or inheritance tax; nation's leading trust domicile with $600B+ in trust assets
🏔️
COUNTRY B
Colorado
TAX RATE
4.4%
Flat Income Tax — TABOR Refunds Partially Offset; Very Low Property Tax
4.4% flat income tax on all income; TABOR refunds ~$800/filer annually in recent years; 2.9% state sales tax (~7.5% combined average); property tax ~0.55% average (very low); no estate tax; capital gains taxed as ordinary income at 4.4%
TYPICAL ANNUAL DIFFERENCE
Moving from Colorado → South Dakota at Net annual South Dakota advantage vs Colorado at $100K–$500K (income tax saving minus property tax differential + sales tax saving; TABOR of ~$800 reduces net advantage at lower incomes)
$1,800–$14,000+ net
That's $150–$1,167/month net at $100K–$500K income back in your pocket
Section 02

Tax Savings by Income Level

Net take-home after all income tax, social contributions, and surcharges — for a single employee with no dependents.
GROSS INCOME
🦅 SD TAX
🏔️ CO TAX
SAVINGS
10-YEAR
$50,000
$0 income tax; ~$2,679 property (1.14% × $235K home); ~$1,280 sales (6.4% × $20K spending) = ~$3,959 total
~$2,200 income tax (4.4%); −~$800 TABOR = ~$1,400 net income tax; ~$1,293 property (0.55% × $235K home); ~$1,500 sales (7.5% × $20K) = ~$4,193 total
SD saves ~$2,200 income tax; pays ~$1,386 more in property; saves ~$220 in sales = ~$1,034 net SD advantage at $50K (before TABOR); ~$234 net SD advantage after TABOR
$2,340
$100,000
$0 income tax; ~$3,420 property (1.14% × $300K home); ~$1,920 sales (6.4% × $30K) = ~$5,340 total
~$4,400 income tax (4.4%); −~$800 TABOR = ~$3,600 net; ~$1,650 property (0.55% × $300K home); ~$2,250 sales (7.5% × $30K) = ~$7,500 total
SD saves ~$4,400 income tax; pays ~$1,770 more in property; saves ~$330 in sales = ~$2,960 gross SD advantage; ~$2,160 net after TABOR offset
$21,600
$200,000
$0 income tax; ~$5,700 property (1.14% × $500K home); ~$2,560 sales (6.4% × $40K) = ~$8,260 total
~$8,800 income tax (4.4%); −~$800 TABOR = ~$8,000 net; ~$2,750 property (0.55% × $500K home); ~$3,000 sales (7.5% × $40K) = ~$13,750 total
SD saves ~$8,800 income tax; pays ~$2,950 more in property; saves ~$440 in sales = ~$6,290 gross SD advantage; ~$5,490 net after TABOR
$54,900
$300,000
$0 income tax; ~$7,980 property (1.14% × $700K home); ~$3,200 sales (6.4% × $50K) = ~$11,180 total
~$13,200 income tax (4.4%); −~$800 TABOR = ~$12,400 net; ~$3,850 property (0.55% × $700K home); ~$3,750 sales (7.5% × $50K) = ~$20,000 total
SD saves ~$13,200 income tax; pays ~$4,130 more in property; saves ~$550 in sales = ~$9,620 gross SD advantage; ~$8,820 net after TABOR
$88,200
$1M capital gain
$0 state capital gains tax (South Dakota: no income or capital gains tax of any kind)
~$44,000 Colorado state capital gains tax (CO taxes capital gains as ordinary income at 4.4%; TABOR does not separately reduce capital gains tax)
SD saves ~$44,000 on a $1M capital gain event vs Colorado
Depends on frequency; $1,770–$4,130 additional property tax paid annually regardless
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South Dakota Pros & Cons

+ PROS
  • No income tax — South Dakota constitutionally prohibits personal income tax; residents pay $0 on wages, investment income, capital gains, and retirement distributions; Colorado charges 4.4% flat; at $200,000 income, SD saves approximately $8,800/year before property tax offset
  • Nation's premier trust jurisdiction — South Dakota offers dynasty trusts (no rule against perpetuities), Domestic Asset Protection Trusts (DAPTs), directed trust laws, and trust privacy protections; over $600B in trust assets are domiciled in South Dakota; trust income held in SD trusts is free from state income tax
  • Lower combined sales tax — South Dakota's combined average (~6.4%) is below Colorado's (~7.5%); on $40,000/year of taxable purchases, SD saves approximately $440/year
  • No estate or inheritance tax — South Dakota has no estate or inheritance tax; Colorado also has none; equal on this dimension, but SD's income tax advantage compounds wealth accumulation for trust beneficiaries
  • Strong income tax advantage at high incomes — the property tax differential ($1.14% vs 0.55%) becomes less significant relative to the income tax savings as income rises; at $500K income, SD saves $22,000/year in income tax while paying only ~$3,000–$5,000 more in property tax
− CONS
  • Higher property tax than Colorado — South Dakota's ~1.14% is more than double Colorado's ~0.55%; on a $500,000 home, SD costs approximately $2,950/year more in property tax; Colorado's very low property tax is a structural advantage for homeowners with high-value properties
  • TABOR refunds reduce Colorado's disadvantage — Colorado's constitutional TABOR mechanism returns approximately $800/filer annually; this narrows the SD income tax advantage at lower income levels; at $100K income, the net SD advantage after TABOR is approximately $2,160 vs $2,960 gross
  • Limited urban infrastructure — Sioux Falls and Rapid City offer moderate mid-size city amenities but cannot match Denver's career ecosystem, cultural offerings, and international airport connectivity
🏔️

Colorado Pros & Cons

+ PROS
  • Very low property tax — Colorado's ~0.55% effective rate is one of the lowest in the US; for homeowners with high-value properties, this partially or fully offsets Colorado's income tax burden at lower income levels
  • TABOR refunds reduce income tax net cost — Colorado's Taxpayer's Bill of Rights has returned approximately $800/filer per year in recent years, reducing the effective income tax burden; at $50,000 income, Colorado's net tax after TABOR approaches South Dakota's total tax bill
  • Denver career ecosystem — Denver's technology, aerospace, energy, and outdoor industry job market far exceeds what Sioux Falls or Rapid City can offer; for career-dependent professionals, Colorado's urban economy is a genuine financial argument
  • Equivalent sales tax range — Colorado's ~7.5% is above South Dakota's ~6.4%, but both are in a moderate range; the sales tax differential is secondary to the income and property tax comparison
− CONS
  • 4.4% flat income tax on all income — Colorado residents pay 4.4% from the first dollar; at $200,000, approximately $8,800/year; at $300,000, approximately $13,200/year; TABOR partially offsets this at ~$800/filer but does not eliminate the burden at high incomes
  • Capital gains taxed as ordinary income — Colorado taxes all capital gains at 4.4% with no preferential rate; South Dakota charges $0; a $1M capital gain costs approximately $44,000 in Colorado state tax
  • Higher combined sales tax — Colorado's ~7.5% combined average exceeds South Dakota's ~6.4%; on $40,000/year of spending, approximately $440/year more in Colorado
  • TABOR refund is not proportional at high incomes — the ~$800 TABOR refund becomes a tiny fraction of a high earner's income tax burden; at $300,000 income with $13,200 in income tax, TABOR returns only ~6%
FAQ

Frequently Asked Questions

Does South Dakota have an income tax?

No. South Dakota's state constitution has prohibited a personal income tax since statehood in 1889. Residents pay $0 state tax on wages, salaries, investment income, capital gains, and retirement distributions. South Dakota funds government through a 4.2% state sales tax (combined ~6.4%), property taxes (~1.14% average), and revenues from tourism and gaming.

How does South Dakota's property tax compare to Colorado's?

South Dakota's effective property tax rate averages approximately 1.14% of market value — more than double Colorado's approximately 0.55%. On a $400,000 home: South Dakota costs approximately $4,560/year; Colorado approximately $2,200/year — a difference of approximately $2,360/year. This property tax differential is the primary reason South Dakota's income tax advantage over Colorado is smaller than vs high-income-tax states.

What is Colorado's TABOR refund and does it affect this comparison?

Colorado's TABOR (Taxpayer's Bill of Rights) requires excess state revenues to be refunded to income tax filers, approximately $800/person in recent years. This reduces South Dakota's income tax advantage: at $100K income, the gross SD income tax saving is $4,400, but TABOR refunds $800 to Colorado residents, narrowing the net advantage to approximately $3,600 before property tax offset. At higher incomes ($300K+), the $800 TABOR refund represents an increasingly small proportion of Colorado's income tax bill.

Why does South Dakota have higher property taxes than Colorado?

South Dakota funds government services through sales taxes and property taxes, without an income tax. Colorado's unusually low property tax (~0.55%) reflects both TABOR-driven fiscal constraints and Colorado's relatively diverse revenue base. South Dakota's $1.14% rate is near the US national average, while Colorado's 0.55% is among the lowest nationally. For the South Dakota vs Colorado comparison, this property tax difference significantly reduces SD's income tax advantage at lower income levels.

Is South Dakota better than Colorado for trust planning?

Yes, significantly. South Dakota's trust laws are universally regarded as the most favorable in the US: no rule against perpetuities (dynasty trusts can last indefinitely), strong Domestic Asset Protection Trusts (DAPTs), directed trust legislation, trust privacy laws, and no state income tax on trust income. Colorado has no comparable trust law infrastructure. Wealthy families and advisors domicile trusts in South Dakota specifically to access these advantages — with over $600B in trust assets, South Dakota's trust ecosystem is unmatched.

How much does a Colorado resident save by moving to South Dakota?

At $100,000 income: SD saves $4,400 in income tax but pays ~$1,770 more in property tax on an equivalent $300K home, plus saves ~$330 in sales tax = approximately $2,960 gross ($2,160 after TABOR). At $200,000: approximately $5,490 net. At $300,000: approximately $8,820 net. For capital gains: a $1M gain saves approximately $44,000. The net advantage grows significantly at higher incomes where property tax becomes proportionally less significant.
From the brief
PT20%qualifying work, 10yr
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GR7%foreign income, 15yr
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