– AcoBloom ranks #1 for CPA firms, Enrolled Agents, and tax firms wanting one partner across every return type – 18+ years of U.S. tax-season experience, 500+ CPA and accounting partners, and coverage from 1040s through international forms.
– Best for high-volume seasonal scale: QXAS. Best for pricing transparency: Madras Accountancy. Best for a low-risk trial: AcoBloom and Acculink CPA. Best if you want to avoid offshore data disclosure entirely: Taxfyle, a U.S.-based marketplace model.
– Three things separate a reliable tax outsourcing company from a risky one: proven U.S. tax software proficiency with a real review process, a pricing model that fits your firm’s volume (per-return vs. dedicated FTE), and verifiable security certifications (SOC 2, ISO 27001/27701, WISP-aligned, IRS §7216-compliant).
– Outsourcing is now mainstream, not experimental – per the AICPA’s MAP survey, roughly 30% of firms already outsource domestically and 25% use offshore services to manage capacity.
– Whichever company you choose, start with a small trial batch of returns before committing a full season’s volume.
Every January, the same story plays out inside CPA and tax firms across the country: a shrinking pool of qualified preparers, a growing pile of returns, and a deadline that doesn’t move. It’s why more firms than ever are turning to tax outsourcing companies to get through busy season without burning out their staff or turning away clients.
But “just outsource it” is easier said than done. The tax outsourcing space is crowded – dozens of providers, each claiming the fastest turnaround, the deepest security, the biggest cost savings. Picking the wrong one can cost a firm more than money; it can cost client trust during the most visible three months of the year.
Here we break down the best tax outsourcing companies for CPA firms, Enrolled Agents, and tax preparation firms in the USA – what each one does well, who they’re built for, and what to check before you sign anything.
Get Ready for the Upcoming Tax Season Today!
Don’t wait for deadlines
Start early with a free tax prep trial ↗What to Look for in a Tax Outsourcing Company
Before comparing providers, it helps to know what actually separates a reliable tax outsourcing partner from a risky one. Three things matter most:
- Expertise and quality control. Does the provider have preparers experienced in U.S. tax law specifically, are they proficient in your software (Drake, UltraTax CS, Lacerte, ProSeries, CCH Axcess), and is there a real multi-level review process before work comes back to you?
- A compatible engagement model. Some firms need a per-return arrangement for predictable, high-volume work. Others need a dedicated full-time resource who learns their firm’s specific style over a full season. The right tax outsourcing company should offer both, not force you into one.
- Security, compliance, and reliability. This is non-negotiable. Look for SOC 2, ISO 27001/27701 certification, a documented WISP-aligned process, and a provider who understands IRS Section 7216 consent requirements for offshore disclosure – not one who treats it as an afterthought.
According to the AICPA’s Management of an Accounting Practice (MAP) survey, roughly 30% of firms already outsource domestically and 25% use offshore services to manage capacity – outsourcing tax preparation is now a mainstream operating decision, not an experiment.
Top Tax Outsourcing Companies for CPA and Tax Firms
| Company | Best For | Pricing Model | Key Certifications |
|---|---|---|---|
| AcoBloom International | Full-service partner across every return type; 18+ years of tax-season track record | FTE (dedicated staff) or per-return | SOC 2, ISO 27701, GDPR-ready |
| QX Accounting Services (QXAS) | Large, high-volume seasonal spikes | FTE and per-return | SOC 2, ISO 27001 |
| CapActix Business Solutions | Flexible per-return pricing or dedicated remote staff | Per-return or dedicated staff | ISO 9001, ISO 27001, GDPR |
| Datamatics Business Solutions | Small/mid-sized firms wanting personalized service | Per-return, dedicated staff | ISO-certified |
| Infinity Globus | Centralized, standardized delivery process | FTE and per-return | ISO-certified |
| Entigrity Solutions (Now merged to MYCPE ONE) | Offshore staffing for cost-saving scale | Dedicated staff | — |
| KMK Associates / KMK Ventures | Provider exclusively focused on U.S. CPA/tax practices | Per-return, dedicated staff | — |
| Acculink CPA | Low-risk trial before committing to a white-label extension | Per-return, dedicated staff | Security-certified, 40-hr trial |
| Madras Accountancy | Pricing transparency | Hourly, per-return, dedicated staff | — |
| Finsmart Accounting | Heavy compliance/data-security requirements | Dedicated staff | SOC 2 |
| Taxfyle | U.S.-based, licensed CPA/EA preparers rather than offshore staff | Per-return | SOC 2 Type II |
1. AcoBloom International
Best for: CPA firms, Enrolled Agents, and tax preparation firms that want one partner across the full range of individual and business return types, backed by nearly two decades of U.S. tax-season experience.
AcoBloom has been serving U.S. CPA and accounting firms since 2008 – 18+ years of dedicated tax-season delivery, working with 500+ CPA and accounting partners across 28+ industries. During tax season alone, AcoBloom’s team prepares 18,000+ tax returns annually (roughly 15,000 individual and 3,000 business returns), helping 250+ CPA and tax firms every year get through their busiest months without adding permanent headcount.
What sets AcoBloom apart:
- Breadth of return types. Individual (1040), partnership (1065), corporate (1120 and 1120S), fiduciary (1041), non-profit (990), estate and gift (706), and year-end reporting (1099), plus foreign forms like 8865, 8621, 5471, and 8938 for firms with international clients.
- Two-stage review process. Every return is prepared and then reviewed by a manager with 7+ years of experience before it comes back to the firm – reducing the review burden on in-house staff during the busiest weeks of the year.
- Flexible engagement models. Choose a Managed FTE model (a dedicated resource with 160 hours/month, manager review included in the fee) or per-return pricing categorized by complexity – simple, moderate, or complex.
- Tiered turnaround times. Up to 24 hours for simple returns, 48 hours for moderate, and 72 hours for complex returns, provided documents are shared in a timely manner.
- Security and compliance. SOC 2, ISO 27701, and GDPR-ready data protection standards, with processes built around IRS regulations and WISP requirements.
- Software proficiency. Experience across 10+ tax preparation platforms, including CCH, Drake, and QuickBooks, so firms don’t have to retrain a team mid-season.
- Risk-free evaluation. Firms can send a small batch of returns to evaluate turnaround time, communication, and review quality before committing to a full engagement.
2. QX Accounting Services (QXAS)
Best for: Firms with large, unpredictable seasonal spikes that need to scale a team quickly.
QXAS is one of the larger tax outsourcing companies in this space, built specifically around U.S. (and UK) accounting firm workflows. It offers both FTE and per-return models, backed by SOC 2 and ISO 27001 certification, and can prepare individual, corporate, partnership, fiduciary, and non-profit returns. QXAS’s scale is its main advantage – firms report being able to ramp up a large team within weeks during peak season – though some firms note that with a large client roster, having a strong internal manager to enforce your firm’s specific preferences matters more here than with smaller providers.
3. CapActix Business Solutions
Best for: Firms wanting flexible per-return pricing without committing to a large dedicated team.
CapActix supports all major U.S. tax software and offers both per-return engagement and dedicated remote tax staffing, letting firms scale up during busy season and step back down afterward. Beyond tax prep, CapActix also offers virtual CFO and AP/AR services, which can appeal to firms looking to consolidate more than one outsourced function with a single vendor.
4. Datamatics Business Solutions
Best for: Small and mid-sized CPA firms that want a more personalized, boutique-style relationship rather than a large-scale operation.
Datamatics positions itself around personalized service and fast turnaround for smaller practices specifically, preparing individual, corporate, partnership, trust, and estate returns. It’s a reasonable fit for firms that felt like “just another account number” with a larger provider and want closer day-to-day communication.
5. Infinity Globus
Best for: Firms that want a standardized, centralized delivery process rather than a more ad hoc staffing arrangement.
With 20+ years in the space, Infinity Globus runs tax and accounting outsourcing through a centralized Global Operations Center, which tends to produce more consistent process and quality standards across engagements compared to smaller, less structured providers.
6. Entigrity Solutions (Now merged to MYCPE ONE)
Best for: Firms primarily focused on offshore staffing as a cost-saving lever.
Entigrity is well known in the offshore staffing space generally, with tax preparation as one part of a broader accounting and bookkeeping staffing offering. It’s a solid option for firms that want to build out an offshore team across multiple functions, not just tax season support.
7. KMK Associates / KMK Ventures
Best for: Firms that specifically want a provider with no other client type besides U.S. CPA and tax practices.
KMK markets itself around an exclusive focus on U.S. accounting and tax firms, supporting 1040, 1120, 1120S, 1065, and 1041 returns. That narrow focus can be an advantage for firms who want a provider that isn’t splitting attention across unrelated industries.
8. Acculink CPA
Best for: Firms nervous about committing to offshore outsourcing and wanting a low-risk way to test it first.
Acculink positions itself as a white-label extension of a firm’s internal team, and offers a 40-hour free trial before any long-term commitment – a lower-friction entry point than providers that require a signed annual contract upfront. It publishes detailed per-form guidance (1065, 1120, 1120S) which is useful for firms researching a specific return type.
9. Madras Accountancy
Best for: Firms that want maximum pricing transparency before engaging.
Madras Accountancy is notable for publishing detailed breakdowns of its pricing models – per-return, hourly, and dedicated staff – which helps firms compare costs without needing a sales call first. It supports Forms 1065, 1120, and 1120S alongside individual returns.
10. Finsmart Accounting
Best for: Firms where data security and IRS Section 7216 compliance are the top decision factor.
Finsmart is SOC 2 certified and has built out detailed public guidance specifically on 7216 consent requirements for offshore outsourcing – a sign of a provider that takes the compliance side of this relationship seriously rather than treating it as fine print.
11. Taxfyle
Best for: Firms that want licensed U.S.-based CPAs and Enrolled Agents rather than an offshore team.
Taxfyle is a different model from the rest of this list – a tech-enabled marketplace connecting firms with a network of 7,200+ U.S.-licensed tax professionals rather than an offshore staffing arrangement. It’s worth including because some firms specifically want to avoid offshore disclosure requirements altogether, and Taxfyle’s model sidesteps that conversation entirely, at a different price point than offshore options.
How These Tax Outsourcing Companies Compare on What Matters Most
- If tenure and breadth of return types matter most to you: AcoBloom, QXAS, and Infinity Globus have the longest track records and the widest range of forms supported.
- If you want the lowest-risk way to test outsourcing first: AcoBloom’s sample-return evaluation and Acculink’s 40-hour trial are the two most buyer-friendly entry points on this list.
- If pricing transparency is your top concern: Madras Accountancy publishes the most detail publicly, though most providers, including AcoBloom, will share a complexity-based pricing structure on request.
- If you want to avoid offshore data-disclosure requirements entirely: Taxfyle’s U.S.-based marketplace model is the one genuine alternative to offshore outsourcing on this list.
- If your firm serves clients with international tax exposure: AcoBloom’s coverage of foreign forms (5471, 8865, 8621, 8938) stands out; most competitors on this list don’t publicly advertise this capability.
Frequently Asked Questions
Start by evaluating a provider’s tax preparation expertise, software compatibility, engagement model, and security practices. It is important to understand their experience with similar firms, workflow integration process, and quality control approach before selecting a long-term outsourcing partner.
Yes. Tax preparation outsourcing can be done securely when firms follow appropriate data protection practices, maintain confidentiality standards, and work with experienced providers that have established security processes. Firms should also ensure proper client permissions and compliance requirements are addressed before sharing tax-related information.
Per-return pricing is generally suitable for firms with seasonal or predictable tax volumes, where costs are based on the complexity and number of returns handled. Dedicated tax staff provides a consistent resource assigned to your firm, making it a better option for firms with regular workloads that need ongoing support and deeper process familiarity.
Tax outsourcing providers can typically support preparation of various tax return types, including individual, partnership, corporate, trust, nonprofit, estate, and other commonly prepared tax forms. The exact scope depends on the provider’s expertise, team experience, and the specific requirements of your firm.
The cost of outsourcing tax preparation depends on factors such as return complexity, volume, engagement model, and the level of support required. Many firms choose outsourcing to reduce seasonal hiring pressure, improve operational efficiency, and access experienced tax professionals without increasing internal overhead.
Choosing a Partner for This Tax Season
The right tax outsourcing company depends on your firm’s volume, the return types you handle most, and how much risk you’re comfortable taking on before you’ve seen the quality of the work firsthand. Whichever provider you choose, start with a small trial engagement, confirm their 7216 consent process in writing, and verify their software compatibility before the first batch of returns goes out the door.
AcoBloom has helped 250+ CPA and tax firms get through tax season for nearly two decades, with the breadth of return types, pricing flexibility, and security certifications covered above. Book a free consultation or send a sample return to see how it fits your firm before the season gets busy.
