CPA Services for Consulting Firms and Service Businesses
Full-service tax, bookkeeping, payroll, and CFO advisory for consulting practices, agencies, professional service firms, and small consultancies.
Who This Is For
Solo consultants, small consulting partnerships, marketing and creative agencies, IT and management consulting firms, professional service LLCs and S-Corps with 1-50 employees or contractors.
Top Tax Issues for Consulting Firms
Specified Service Trade or Business (SSTB) limits on QBI
Consulting is classified as an SSTB under Section 199A. Above the income thresholds ($241,950 single / $483,900 joint for 2025, indexed annually), the 20% QBI deduction is fully phased out for SSTB owners.
Reasonable compensation for S-Corp owner-consultants
S-Corp consultants who pay themselves only minimal W-2 wages while taking large distributions face IRS audit and reclassification. Reasonable comp is benchmarked against role, region, hours, and revenue.
Multi-state nexus from remote consulting work
Performing consulting services in another state can create income tax nexus, sales tax nexus on certain digital services, or payroll registration obligations. Each state's rules differ.
Contractor vs employee classification
Sub-contracting consulting work to independent contractors must satisfy the IRS 20-factor test. Misclassification creates back-payroll-tax liability with penalties.
Strategies TS CPA Uses
Pass-Through Entity Tax (PTET) election
Roughly 36 states allow consulting LLCs and S-Corps to pay state income tax at the entity level, deduct it federally as a business expense, and credit it back on owner returns. This circumvents the $10K-$40K SALT cap.
Defined benefit / cash balance pension plans
High-income consulting partnerships and S-Corps can deploy defined-benefit or cash-balance plans that allow $200K-$300K+ in annual deductible contributions per partner: often the largest single tax deduction available to a consulting firm.
Accountable plan reimbursements
A formal accountable plan lets the firm reimburse owner-employees for home office, mileage, and business expenses tax-free instead of claiming them on the personal return: important after the TCJA elimination of W-2 employee unreimbursed business expense deductions.
Fractional CFO and quarterly tax review
Quarterly estimated tax planning, monthly bookkeeping, and CFO-level financial reporting (P&L, cash flow forecast, KPI dashboard) keep consulting firms ahead of growth-driven tax surprises.
Services for Consulting Firms
Business Tax Preparation
Expert and tailored business tax services, because your business deserves more than a generic filing.
Bookkeeping Services
Reliable, CPA-managed bookkeeping that keeps your financials clean, accurate, and tax-ready year-round.
Payroll Services
Never miss a deadline. Never face a penalty. Your payroll, handled completely.
CFO & Advisory Services
Strategic financial guidance to help your business grow with confidence and clarity.
Tax Planning & Strategy
Year-round, proactive tax planning that puts more money back in your pocket, not the IRS's.
Tax Forms Consulting Firms Should Know
Key Tax Terms for Consulting Firms
S Corporation
A pass-through tax election under Subchapter S of the Internal Revenue Code that avoids corporate double taxation while allowing shareholder-employees to reduce self-employment tax.
Partnership
A business entity owned by two or more persons who share in profits and losses, taxed as a pass-through with each partner reporting their share on their individual return.
Section 199A QBI Deduction
A federal deduction of up to 20% of Qualified Business Income for owners of pass-through entities and sole proprietorships.
Pass-Through Entity Tax (PTET) Election
A state-level tax elected at the entity level to allow pass-through owners to circumvent the federal SALT deduction cap.
Pass-Through Entity
A business entity that does not pay federal income tax at the entity level; instead, profits and losses pass through to owners who report them on their individual returns.
Estimated Tax
Quarterly tax payments made by self-employed individuals, investors, and others whose income is not subject to sufficient withholding.
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