SD Tax & Accounting Services
Kurt Simmons CPA provides comprehensive tax and financial services to individuals and businesses throughout South Dakota (SD). With its no state income tax and trust-friendly asset protection, we understand the unique financial landscape that comes with doing business in South Dakota.
Under the CPA Mobility Act, our CPA — licensed in Maryland, Delaware, and Florida — is authorized to provide the full range of attestation, tax, and advisory services to South Dakota clients without the need for an additional state license. This means South Dakota individuals and businesses receive the same comprehensive service as our home-state clients: financial statement audits, tax strategy, IRS representation, virtual CFO services, and every other service we offer — delivered through our technology-forward, virtual-first practice model.
CPA Services Available in South Dakota (SD)
SD Individual Tax Preparation
Comprehensive federal and South Dakota state tax return preparation, including complex returns with investments, rental properties, and self-employment income.
Learn More →SD Business Tax Services
Tax preparation and planning for South Dakota-based businesses including S-Corps, C-Corps, partnerships, LLCs, and sole proprietorships.
Learn More →SD Cryptocurrency Tax
Specialized crypto tax services for South Dakota investors and traders. DeFi, NFTs, staking rewards, and exchange reporting handled with expertise.
Learn More →SD Trader Tax Services
Mark-to-market elections, wash sale tracking, and tax optimization strategies for active traders in South Dakota.
Learn More →SD IRS Resolution
Professional representation before the IRS for South Dakota taxpayers facing audits, collections, liens, levies, or offers in compromise.
Learn More →SD 83(b) Elections
Equity compensation planning and 83(b) election filing for South Dakota startup employees and founders receiving restricted stock.
Learn More →SD Financial Statement Audits
Full-scope GAAS-compliant financial statement audits for businesses, nonprofits, and organizations requiring independent assurance.
Learn More →SD Review Engagements
Limited assurance engagements providing meaningful confidence in financial statements for lender requirements and stakeholder reporting.
Learn More →SD Compilations
Professionally prepared financial statements from management-provided data for internal reporting, small business needs, and bank presentations.
Learn More →SD Agreed-Upon Procedures
Targeted, customized engagements designed to address specific areas of concern with flexible scope tailored to stakeholder needs.
Learn More →SD Employee Benefit Plan Audits
DOL-compliant audits for 401(k), pension, and employee benefit plans meeting ERISA filing requirements and fiduciary obligations.
Learn More →SD Tax Strategy & Advisory
Proactive, year-round tax planning that identifies savings opportunities. Entity structure optimization, multi-state planning, and strategic initiatives.
Learn More →SD Cost Segregation Studies
Engineering-based analysis to accelerate depreciation deductions on commercial and residential rental properties, maximizing cash flow.
Learn More →SD Virtual CFO Services
Fractional CFO capabilities including financial modeling, cash flow management, KPI dashboards, and strategic financial leadership.
Learn More →SD Business Consulting
Operational assessments, process improvement, internal control design, and strategic planning to drive efficiency and profitability.
Learn More →SD Estate & Succession Planning
Comprehensive estate planning, business succession strategies, and wealth transfer optimization for business owners and high-net-worth individuals.
Learn More →SD Capital Markets Advisory
Securities compliance, FINRA regulatory guidance, and capital markets advisory for businesses navigating public offerings, private placements, and broker-dealer requirements.
Learn More →South Dakota Audit Services in Detail
South Dakota businesses, nonprofits, federal contractors, tribal entities, and benefit plan sponsors typically need an independent audit when state law, federal rules, lenders, grantmakers, or boards require external assurance. We perform GAAS-compliant attest engagements scoped to the specific assurance need — most commonly:
Ellsworth AFB & SD Federal Contractor Audits
South Dakota hosts Ellsworth Air Force Base (Box Elder, near Rapid City — home of the 28th Bomb Wing operating B-1B Lancer bombers; one of the U.S. Air Force's two B-1 bases; selected as a future B-21 Raider base). Ellsworth anchors a substantial federal contractor ecosystem in western SD. We support SD federal contractors with GAAS-compliant audits, indirect rate calculations and DCAA-compliant accounting systems, Cost Accounting Standards (CAS) compliance, and audits prepared for security-cleared business operations.
South Dakota Tribal Audits (Pine Ridge, Rosebud, Standing Rock, Cheyenne River)
South Dakota is home to nine federally recognized tribes, including the Oglala Sioux Tribe (Pine Ridge Reservation — among the largest reservations in the U.S.), the Rosebud Sioux Tribe, the Cheyenne River Sioux Tribe, the Standing Rock Sioux Tribe (extending into ND), the Lower Brule Sioux Tribe, the Crow Creek Sioux Tribe, the Sisseton-Wahpeton Oyate, the Yankton Sioux Tribe, and the Flandreau Santee Sioux Tribe. Many operate Class III gaming under tribal-state compacts requiring NIGC MICS audits. We perform tribal gaming audits, tribal-government enterprise audits, and federal subrecipient audits for tribal entities.
South Dakota Trust & Trust Company Audits
South Dakota has built one of the most favorable U.S. trust environments through legislative reforms over several decades — no state income tax on trust income, perpetual (no rule against perpetuities) dynasty trusts, robust asset-protection trust legislation (SD allows self-settled spendthrift trusts), discretionary support trusts, decanting flexibility, directed trust provisions separating fiduciary roles, strong privacy/secrecy provisions, and a respected SD trust company industry centered in Sioux Falls. SD trust assets are among the largest of any U.S. jurisdiction. While we do not serve as a trustee or audit SD trust companies directly, we coordinate income-tax planning between non-SD-resident grantors/beneficiaries and SD trust company arrangements, and prepare federal Form 1041 trust returns and beneficiary K-1s for SD-situs trusts.
South Dakota Nonprofit & Healthcare Audits
Audited financial statements for SD charities are routinely required by major SD funders — including the Helmsley Charitable Trust (substantial SD healthcare investments), the Bush Foundation (regional MN/ND/SD), the South Dakota Community Foundation, the Sioux Falls Area Community Foundation, the Sanford Health Foundation, the United Way affiliates, and federal subrecipient grantors.
South Dakota 401(k) & Employee Benefit Plan Audits
South Dakota plan sponsors filing Form 5500 generally require an ERISA-compliant audit when the plan has 100 or more participants with account balances at the start of the plan year. We perform full-scope and §103(a)(3)(C) limited-scope benefit plan audits for 401(k), 403(b), and defined-benefit plans across South Dakota, including plans sponsored by Sanford Health (Sioux Falls — one of the largest rural health systems in the U.S.), Avera Health (Sioux Falls), Citibank/Citi Cards (Sioux Falls — credit card operations relocated to SD in 1981 under SD's interest-rate deregulation), Wells Fargo (Sioux Falls credit card operations), U.S. Bank, First Premier Bank/First Premier Bankcard, Daktronics (Brookings — large LED scoreboards and displays), POET (Sioux Falls — one of the world's largest ethanol producers), Raven Industries (CNH/Case IH agricultural technology), and SD's substantial agricultural cooperative network.
South Dakota Single Audits (Uniform Guidance)
South Dakota nonprofits, counties, school districts, tribal entities, and pass-through subrecipients that expend $1,000,000 or more in federal awards in a fiscal year are subject to the Single Audit requirements of 2 CFR Part 200.
South Dakota Reviews & Compilations
Where a full audit is not required, we deliver review engagements (limited assurance) and compilations (no assurance) — both routinely accepted by South Dakota lenders (First Bank & Trust, BankWest, Plains Commerce Bank, First PREMIER Bank) and stakeholders requiring CPA-prepared financial statements.
South Dakota (SD) Tax & Business Landscape
Key South Dakota Tax Numbers. Personal income tax: none — SD is one of nine states with no broad personal income tax. Corporate income tax: none — SD is one of only two states (with Wyoming) without both an individual and a broad corporate income tax. Sales and use tax: 4.2% state (reduced from 4.5% effective July 2023; subject to sunset under recent legislation), plus city sales tax; combined typically 5%–6.5%. Bank franchise tax: SD imposes a franchise tax on banks operating in SD. Estate tax: none. Pass-through entity (PTE) elective tax: none — SD has no individual income tax for the workaround to address.
Filing Mechanics. SD residents and businesses generally file only federal returns (Form 1040 individuals, Form 1120 C-corps, Form 1065 partnerships, Form 1120-S S-corps) plus any other state returns where the taxpayer has nexus. SD itself has no individual or corporate income tax filing. SD businesses must register for sales tax (Form ST-1) and bank franchise tax where applicable.
South Dakota Trust Law — A National Wealth Planning Hub. South Dakota has built one of the most favorable U.S. trust environments through decades of focused legislative reform: no state income tax on trust income (substantial advantage for grantor-trust planning), perpetual dynasty trusts (SD abolished the rule against perpetuities), robust asset-protection trust legislation (SD permits self-settled spendthrift trusts, joining a small group of states with strong APT statutes), discretionary support trusts with strong creditor protection, broad decanting authority, directed trust provisions allowing separation of investment and distribution roles, strong privacy and seal-court provisions, and a respected SD trust company industry centered in Sioux Falls. SD trust assets exceed several hundred billion dollars, attracting wealth-planning work from clients nationwide. We coordinate planning between non-SD-resident grantors/beneficiaries and SD trust company arrangements, prepare federal Form 1041 returns for SD-situs trusts, and address the SD Section 643(f) and ING (incomplete non-grantor) trust questions.
Sioux Falls — A National Credit Card Center. Sioux Falls became a major U.S. credit card and financial services center after Citibank moved its credit card operations to South Dakota in 1981, taking advantage of SD's interest-rate deregulation that allowed banks chartered in SD to charge higher rates than home-state usury laws permitted. Other major Sioux Falls financial services employers include Wells Fargo, U.S. Bank, First Premier Bank and First Premier Bankcard, and historical Capital One operations. Combined with the SD trust industry, Sioux Falls hosts a substantial financial services workforce. We support executive compensation, RSU/PSU vesting, NQDC plans, and ESPP planning for Sioux Falls financial services professionals.
SD Healthcare — Sanford and Avera. Sanford Health (Sioux Falls — one of the largest rural health systems in the U.S.; named after T. Denny Sanford) and Avera Health (Sioux Falls) anchor SD's healthcare sector and serve a multi-state Upper Midwest patient base. We support physician, NP, and healthcare executive tax planning, including the unique federal-only state-tax structure that benefits SD-resident healthcare providers.
South Dakota Tourism & the Black Hills. SD's tourism economy spans Mount Rushmore National Memorial, the Crazy Horse Memorial, Custer State Park, the Badlands National Park, Wind Cave, the Black Hills, Deadwood (limited gaming), Wall Drug, and the iconic Sturgis Motorcycle Rally (annually the world's largest motorcycle rally). We serve SD lodge/resort operators, Black Hills tourism operators, and Sturgis-event vendors.
South Dakota Economy & Who We Serve. SD's economy spans financial services and trust administration (Sioux Falls — the largest SD economic sector by output: credit card, banking, trust companies), healthcare (Sanford, Avera), agriculture (cattle ranching across western SD; corn, soybeans, wheat, sunflowers; ethanol — POET headquartered in Sioux Falls), tourism (Mount Rushmore, Black Hills, Sturgis Rally, Custer State Park), tribal economic enterprises (9 federally recognized tribes), military (Ellsworth AFB B-1/future B-21), manufacturing (Daktronics LED displays — Brookings; Raven Industries — agricultural technology), and education (USD, SDSU). Our typical SD clients include trust company professionals and SD-situs trust beneficiaries, Sioux Falls credit card / Citi / Wells Fargo professionals, ranchers and SD farm operators, Black Hills tourism operators, real estate investors, Sanford and Avera healthcare professionals, Ellsworth AFB military families, and high-net-worth families using SD as a domicile or trust situs.
CPA Mobility in South Dakota. South Dakota has adopted CPA mobility provisions under the Uniform Accountancy Act. Kurt Simmons holds active CPA licenses in Maryland, Delaware, and Florida, and we confirm all applicable South Dakota Board of Accountancy mobility and firm registration requirements before commencing any engagement.
Cities and Communities We Serve. Our virtual-first practice serves clients across all of South Dakota, including Sioux Falls (largest city; credit card industry; Sanford Health; trust companies), Rapid City (Black Hills; Mount Rushmore gateway; Ellsworth AFB), Aberdeen, Brookings (SDSU; Daktronics), Watertown, Mitchell (Corn Palace), Pierre (state capital — smallest U.S. state capital by population), Yankton, Huron, Vermillion (USD), Spearfish, Box Elder (Ellsworth AFB), Sturgis, the Pine Ridge, Rosebud, Standing Rock, Cheyenne River, and Lower Brule reservations, the Black Hills, the Badlands, and every South Dakota county.
Why South Dakota Clients Choose Us
- GAAS-compliant audit, review, and compilation experience for nonprofits, federal contractors (Ellsworth AFB), tribal entities, benefit plans, and privately held businesses
- Deep expertise in SD-specific issues: SD's federal-only tax structure (no state individual or corporate income tax), SD dynasty trust and asset-protection trust coordination, SD-situs Form 1041 trust returns, Sioux Falls credit card / Citibank / Wells Fargo / U.S. Bank / First Premier executive compensation, Sanford and Avera Health professional tax, SD ranching and agriculture (Schedule F, livestock MACRS, §1031 ranch land exchanges), Sturgis Rally vendor accounting, and Ellsworth AFB SCRA/MSRRA military residency planning
- Capital markets background — Kurt Simmons has passed the Series 65 examination (Passed; not currently held as an active license) in addition to holding the CPA
- Specialized practices in cryptocurrency taxation, active trader tax, and 83(b) elections for SD Sioux Falls/Rapid City startup employees
- Technology-forward, virtual-first delivery — secure client portal, e-signature, and video consultations
- Transparent, fixed-fee engagements where possible — no surprise hourly invoices
South Dakota CPA — Frequently Asked Questions
Do I need a South Dakota-licensed CPA?
South Dakota has adopted CPA mobility provisions under the Uniform Accountancy Act. Kurt Simmons holds active CPA licenses in Maryland, Delaware, and Florida, and we confirm any applicable South Dakota Board of Accountancy firm-registration requirements before commencing attest engagements.
Does South Dakota have a state income tax?
No. South Dakota is one of nine U.S. states with no personal income tax and one of only two states (with Wyoming) that also has no corporate income tax. The state imposes a 4.2% sales tax (reduced from 4.5% in 2023) plus local sales tax, a bank franchise tax, and various excise taxes — but no broad-based income or corporate tax. SD residents file only federal returns and any other states where they have nexus.
Why is South Dakota a leading dynasty trust jurisdiction?
South Dakota has built one of the most favorable U.S. trust environments through legislative reforms over several decades: no state income tax on trust income, perpetual (no rule against perpetuities) dynasty trusts, robust asset protection trust legislation (SD allows self-settled spendthrift trusts), discretionary support trust statutes, decanting flexibility, directed trust provisions separating fiduciary roles, strong privacy/secrecy provisions, and a respected SD trust company industry centered in Sioux Falls. SD trust assets exceed several hundred billion dollars. We coordinate planning between non-SD residents and SD trust company arrangements, prepare federal Form 1041 returns for SD-situs trusts, and address Section 643(f) and ING (incomplete non-grantor) trust questions.
I work at a Sioux Falls credit card or financial services company. What special tax issues apply?
Sioux Falls became a major U.S. credit card center after Citibank moved its credit card operations to SD in 1981 (taking advantage of SD's interest-rate deregulation that allowed banks chartered in SD to charge higher rates than home-state usury laws permitted). Major Sioux Falls credit card and financial services employers include Citibank/Citi Cards, Wells Fargo, U.S. Bank, First Premier Bank/First Premier Bankcard, and Capital One historical operations. We handle the executive compensation issues common to financial services professionals: RSU and PSU vesting, NQDC plan elections under §409A, ESPP qualifying vs. disqualifying disposition, and the multi-state issues facing financial services executives with operations in multiple jurisdictions.
I'm a South Dakota rancher. What special tax issues apply?
South Dakota ranching involves specialized federal tax issues: Schedule F farm reporting, livestock depreciation under MACRS (cattle held for breeding/dairy purposes generally 5-year MACRS), conservation easements under IRC §170(h), Section 1031 like-kind exchanges of ranch land, IRC §1301 farm income averaging, Section 2032A special-use valuation for estate tax purposes, and federal farm-program payment treatment. SD's no-state-income-tax structure simplifies the planning compared to most states.
When does my South Dakota nonprofit need an audit?
South Dakota does not impose a strict state-mandated audit threshold for charities under its registration framework, but many SD funders require audited statements regardless — including the Helmsley Charitable Trust (substantial SD healthcare investments), the Bush Foundation (regional MN/ND/SD), the South Dakota Community Foundation, the Sioux Falls Area Community Foundation, the Sanford Health Foundation, and federal subrecipient grantors. Federal Single Audit requirements (2 CFR Part 200) apply when federal expenditures reach $1,000,000 — particularly relevant for tribal entities and rural healthcare.
Do you serve South Dakota clients outside Sioux Falls?
Yes. Our practice is virtual-first, so we serve clients across all of South Dakota — including Sioux Falls (largest city; credit card industry; Sanford Health), Rapid City (Black Hills; Mount Rushmore gateway; Ellsworth AFB), Aberdeen, Brookings (SDSU; Daktronics), Watertown, Mitchell (Corn Palace), Pierre (state capital), Yankton, Huron, Vermillion (USD), Spearfish, the Pine Ridge / Rosebud / Standing Rock / Cheyenne River / Lower Brule reservations, the Black Hills, the Badlands, and rural South Dakota's ranching communities.