Colorado Accounting Firm with Global Expertise

S4 Accounting Services, based in Aurora, Colorado, delivers trusted accounting and bookkeeping solutions, combining 15+ years of international expertise with personalized care for businesses and individuals.

Our Services

At S4 Accounting Services, we don’t believe in one-size-fits-all solutions. Our strength lies in tailoring our expertise to meet the specific needs of small businesses, entrepreneurs, and individuals who want more than just compliance they want a partner who helps them grow with confidence. At the core, S4 specializes in combining global experience with a local touch, bringing more than a decade of international accounting knowledge into every service, while keeping relationships personal, reliable, and growth-focused.

Who we are

Provide financial expertise to small businesses in every industry.

Clients Served
0 k
Savings on taxes
$ 0 M
Years of Experience
0 +

Why choose us

3 Things That Makes Us Different.

  • Client Education First

    We don't just manage your books – we teach you to understand your financial position, empowering you to make informed business decisions and achieve long-term financial success.

  • Transparent Pricing

    Our service pricing is clearly defined and competitive, from $250-$350 monthly bookkeeping to comprehensive financial consultancy packages, with no hidden fees or surprises.

  • Hybrid Service Delivery

    We offer both in-person consultations in Aurora, Colorado and secure virtual services, giving you flexibility while maintaining the personal touch that builds lasting business relationships.

Small Business (Startups, Solopreneurs, Single-Owner LLCs, Early Stage Firms)

As a small business owner, your first few years are pivotal. The decisions you make early entity type, tax elections, bookkeeping systems, payroll arrangements will ripple through every future year. At S4, we build services to help you start smart, stay compliant, and grow with clarity.

What We Offer:

  1. Entity Formation & Smart Structure Selection

    • Guidance on choosing the right entity: LLC vs Professional Corporation vs C-Corp vs S-Corp. We assess liability, ownership needs, tax treatment, and expected growth. 

    • Preparation of required documentation: Articles of Incorporation/Formation, Operating Agreements (or Bylaws for corporations), EIN applications, and initial state/local registrations.

    • Advice on timing of elections (such as S-Corp election), including late election options. We help you weigh the benefits vs additional obligations.

  2. Bookkeeping + Financial Clarity

    • Regular bookkeeping (monthly or quarterly) including reconciliations, tracking revenue, expenses, cash flow.

    • Generation of statements (Profit & Loss, Balance Sheet, Cash Flow) with comparative trend analysis. We also build in Key Performance Indicators (KPIs) so you see metrics like margin, expense ratios, gross profit growth, etc.

    • “Analysis” services: we don’t just deliver numbers; we interpret what they mean, flag what’s off, and help you understand where to invest or cut back.

  3. Tax Strategy, Elections & Preparation

    • Evaluation of deductions, pass-through advantages (such as Section 199A), and self-employment tax burden. For example, we’ll help you analyze whether an S-Corp election could meaningfully reduce self-employment taxes.

    • Support with estimated tax filings to avoid surprises or underpayment penalties.

    • Year-end tax preparation: business returns (Schedule C, 1065, 1120S etc.), state filings, personal returns. Detailed checklist and timeline so everything is ready by deadline.

  4. Payroll & Owner Compensation Structuring

    • Payroll setup and processing services, including state and federal compliance, year-end forms (W-2, 1099).

    • For small businesses using S-Corp election: guidance on reasonable owner/shareholder salary, balancing distributions and salary to maximize tax benefit while staying IRS compliant.

  5. Periodic Business Reviews & Growth Planning

    • Scheduled reviews (quarterly or semi-annual) to assess performance vs goals, cash flow projections, budget vs actual variances.

    • Forecasting and scenario planning: what happens if you raise revenue by 20%, add a new employee, open another location, move into new states, etc.

  6. Specialized Contractor & 1099 Services

    • For contractors or businesses using independent contractors, calculation of tax implications, self-employment tax, and evaluation of whether an S-Corp election makes sense.

  • Avoid unnecessary costs from choosing the wrong entity or missing tax-saving elections.

  • Smooth compliance helps avoid penalties, state fines, or surprise audits.

  • Clarity in finances lets you make strategic decisions: hiring, investment, pricing.

  • Early adoption of clean systems makes growth and scaling much less painful.

Why It Matters

  • Avoid unnecessary costs from choosing the wrong entity or missing tax-saving elections.

  • Smooth compliance helps avoid penalties, state fines, or surprise audits.

  • Clarity in finances lets you make strategic decisions: hiring, investment, pricing.

  • Early adoption of clean systems makes growth and scaling much less painful.

Potential Deliverables

  • Entity Formation Package (articles, EIN, operating agreement)

  • S-Corp Election Decision Report (pros vs cons + actual dollar savings estimate)

  • Monthly Financial Dashboard (KPIs + commentary)

  • Contractor / 1099 Tax Planning Memo

Enterprise Businesses (Multi-Entity, Multi-State, Scaling Operations)

When your business scales, so do complexity and risk. Multiple entities, multi-state operations, intercompany flows, apportionment, regulatory compliance these all demand stronger structure, systems, and proactive planning. S4 supports enterprise clients with the tools, oversight, and strategy to keep all moving parts aligned.

What We Offer:

  1. Multi-Entity Structure & Corporate Architecture

    • Designing holding/operating company splits, subsidiaries, intercompany service entities, management companies. The goal: flexibility, legal liability containment, tax optimization.

    • Asset ownership vs operating entity structure: real estate, IP, etc. Proper design can help with cost segregation, easier exits, and risk separation.

  2. State Apportionment, Nexus & Regulatory Risk Management

    • Analysis of physical and economic nexus triggers in all states where the business operates. Determining whether and how much income, payroll, property, or sales needs to be apportioned.

    • Handling multi‐state filings: which states require resident/non-resident returns, which allow composite returns, etc. Minimizing burdens and potential double taxation.

  3. Advanced Reporting, Controls & Consolidation

    • Creation of consolidated financial statements for multiple entities, intercompany accounting, elimination entries.

    • Management dashboards that show segment results, margin by unit/division, geographic performance.

    • Internal control framework: policies, audit trails, separation of duty for larger teams, risk mitigation.

  4. Executive Compensation, Payroll, and Benefit Planning

    • Designing compensation models for leadership (salary, bonus, equity/distributions). Ensuring structure is defensible for tax, avoids unreasonable compensation risk.

    • Payroll at scale: multiple states, full compliance, benefit administration, retirement plan integrations.

  5. Transaction Advisory & M&A Support

    • Due diligence assistance: financial, tax, legal. Evaluating liabilities, entity status, historical tax elections (e.g. S-Corp, multi-state issues).

    • Integration planning: merging charts of accounts, consolidating systems, ensuring intercompany arrangements are documented.

    • Sale or exit planning, or raising capital: growth modeling, valuation support, tax structuring of exit.

  6. Tax Optimization & Compliance for Complex Jurisdictions

    • State business taxes beyond income: franchise taxes, excise taxes, annual reports, foreign entity registration (for states where doing business).

    • Mitigating exposure to penalties, audits, or surprise filings by staying ahead on changes in state law (economic nexus, PTET, etc.).

  7. Systems, Technology, Scaling Operations

    • Implementing or optimizing accounting/ERP systems that support multiple entities, automate intercompany reconciliation, multi-state payroll/tax handling.

    • Data dashboards, dashboards for CFOs / executives with real-time visibility into cash, burn rates, margins.

Why It Matters

  • Without properly designed structure, scaling businesses can suffer inefficiencies, paying more taxes than necessary, or be vulnerable to risk in new jurisdictions.

  • Transparency and consolidation are essential when you have multiple units or divisions. Clean reporting makes strategy and investment decisions much more reliable.

  • Regulatory compliance across states is increasingly strict. Mistakes in nexus or apportionment can lead to penalties and over-filing.

  • Proper executive compensation and benefit structuring avoid misclassification risks or IRS/state scrutiny.

Potential Deliverables

  • Nexus & Apportionment Audit Report (which states, what triggers, what exposures)

  • Multi-Entity Structure Map + Plan (legal entities, service entities, holding companies)

  • Consolidated Financial Pack for executive review (segments, forecasts, KPIs)

  • Tax Optimization Plan (franchise, excise, income, PTET or SALT workaround)

Nonprofits (501(c)(3), Charitable, Foundation & Mission-Driven Organizations)

Nonprofits are unique: mission comes first, but regulations, fund restrictions, tax-exempt status, donor reporting, and compliance with grant rules are just as critical. S4 tailors services for nonprofits to protect your mission while keeping financial health, transparency, and compliance in lockstep.

What We Offer:

  1. Formation, Governance & Tax-Exempt Status

    • Advice on setting up a nonprofit legal entity (state incorporation or equivalent), drafting bylaws, forming a board, conflict-of-interest policies, etc.

    • Assistance with IRS application (Form 1023 or 1023-EZ) for tax-exempt status, including filings, required documentation, and state charitable registrations where needed.

  2. Accounting & Fund / Program Accounting

    • Class, fund, and restriction tracking so that your books clearly separate restricted vs unrestricted funds, program vs administrative costs.

    • Regular financial statements including Statement of Financial Position, Statement of Activities, and cash flow; program-level reporting showing how funds are used vs budgeted.

    • Monthly or quarterly budget vs actuals reporting, variance analysis for programs, grants, events.

  3. Grant Management, Reporting & Compliance

    • Tracking grant revenue, expense, and ensuring that grantors’ requirements (reporting, allowed expenses, matching funds, etc.) are met.

    • Use of tools/checklists for timely reporting to funders. Ensuring documentation (receipts, timesheets, logs) is maintained for audits or funder reviews.

  4. Annual Filings & State/Local Compliance

    • Federal filings: forms such as Form 990 (990, 990-EZ, etc.), schedules, financial disclosures. State nonprofit registration, charitable solicitation compliance, and required local reports.

    • Addressing unrelated business income (UBIT) issues, ensuring that any business activity separate from mission is treated correctly for taxes.

  5. Payroll, Volunteers & Contractor Relationships

    • Payroll for paid staff; W-2 compliance; benefits. Handling 1099 for contractors, stipends, volunteer reimbursements, etc.

    • Ensuring that classifications are correct and that payroll tax/withholding issues are managed.

  6. Financial Sustainability, Planning & Governance

    • Building multi-year budgets, cash flow forecasts; planning for periods of variable funding or lean years.

    • Creating reserve policies; evaluating fundraising diversification; assessing program ROI.

    • Helping boards and leadership interpret financial statements, understand risk, make informed stewardship decisions.

  7. Audits, Controls & Transparency

    • Establishing internal control practices (segregation of duties, approval protocols, grant vs general fund integrity).

    • Preparation for audits (financial statement audits, compliance audits, grant audits): ensuring records are audit-ready.

    • Ensuring full transparency in financial disclosures for donors, stakeholders, and regulatory agencies.

Why It Matters

  • Donors and funders expect transparency and accountability. Clean financials build trust and help secure continued or new funding.

  • Restrictions on funds must be honored; misusing restricted funds or failing to report can risk tax-exempt status.

  • Nonprofits often face multi-state compliance (solicitation, registration, state filings), which can be overlooked until costly.

  • Good governance and planning help nonprofits focus on mission without being derailed by financial surprises.

Potential Deliverables

  • Nonprofit Startup Package (incorporation, bylaws, exemption filing)

  • Grant Reporting Tool / Template + Schedule

  • Annual 990 Prep Kit + State Filings Review

  • Board Dashboard and Financial Education Session

Client Testimonials

    S4 made starting my business so much easier. S4 transformed my books and gave me clarity. Now I can finally focus on growing my business with confidence.

    Julia Colins

    Former Director

      Professional, reliable, and always available to explain the numbers—S4 makes accounting simple and stress-free.

      Chase Adam

      Co-Founder Coach

        From tax planning to payroll, S4 handles it all. Their personal touch sets them apart from other firms I’ve tried.

        Scott Bromfied

        Co-Founder Shake