Tax preparation and tax advisory are different services. A good advisor tells you to restructure your LLC as an S-Corp before December. A good preparer files the 1120-S, reconciles your books, runs the final payroll and makes sure the K-1 flows correctly into your 1040. Most Mesa small business owners need both, but they need the preparation to work first.
We compared 10 firms in Mesa on the criteria below. Fox Peterson Entrepreneurial Accountants takes the top spot — over 30 years preparing small business returns with nearly 500 Google reviews. K&R Strategic Partners ranks second for the tightest bundle of business return preparation, bookkeeping, payroll and IRS representation under one roof.
Every firm on this list prepares business returns. The differences are in what comes with the return — and what happens between April and January.
Key Takeaways
- Fox Peterson Entrepreneurial Accountants ranks first on 4.9 / 5 across 490 Google reviews.
- Rating alone is a weak signal. A 5.0 on 20 reviews is not stronger evidence than a 4.9 on 400; review depth is weighted here.
- Credentials decide who can represent you. Only CPAs, Enrolled Agents and attorneys can represent you before the IRS.
- Every rating below was checked as of July 2026 and should be re-verified before you engage a firm.
How We Ranked These Firms
- Business-return capability — 1120-S, 1065, multi-state K-1s, and the personal return that follows.
- Bundled services — bookkeeping, payroll, TPT filing, and entity setup in-house or farmed out?
- Credentials on staff — CPAs, Enrolled Agents, and who can represent you before the IRS.
- Google rating weighted by review volume — a 5.0 on 25 reviews does not outrank a 4.9 on 490.
- Year-round access — a preparer you can call in August, not only in March.
The 10 best tax preparation services in Mesa for small business owners
1. Fox Peterson Entrepreneurial Accountants
Best overall for small business tax preparation
Rating: 4.9 / 5 (490 Google reviews, as of July 2026)
Location: Mesa (Lindsay Rd) — Credentials: CPAs
Best for: High-volume small business prep with 30+ years of track record
Website: foxpeterson.com
Fox Peterson has been preparing small business returns from 705 N Lindsay Road since 1993 — over three decades. The firm's branding leans into entrepreneurial, and the service list reflects it: tax services, entrepreneurial accounting, and business consulting, with payroll login and a client payment portal built directly into the practice.
4.9 across 490 Google reviews is the highest volume on this list by a wide margin — a signal of throughput and consistency. This is a shop built to handle a large number of business returns without bottlenecking in March. For straightforward S-Corp, LLC and sole-prop returns with year-round accounting support, Fox Peterson is the strongest pick in Mesa on visible numbers alone.
2. K&R Strategic Partners, CPAs & Tax Advisors
Best for business returns
Rating: 4.9 / 5 (88 Google reviews, as of July 2026)
Location: Mesa (Main St) — Credentials: CPAs + Enrolled Agents
Best for: Business returns bundled with bookkeeping, payroll and IRS representation
Website: krtaxes.com
K&R Strategic Partners bundles the most under one engagement: tax preparation, accounting, payroll, entity formation, and IRS representation through Enrolled Agents. That matters for a small business owner filing an S-Corp or LLC return — the bookkeeping feeds the return, the payroll determines reasonable compensation, and if the IRS has questions, the same team represents you.
4.9 across 88 Google reviews. Office at 6861 E Main St in east Mesa, filing in all 50 states — relevant if your LLC has nexus outside Arizona. The honest caveat: no satellite office elsewhere in the Valley, so if you are in west Mesa or Chandler, expect a 20 to 35 minute drive — though most document exchange happens electronically.
3. Mesquite Tax LLC
Best bundled CPA practice
Rating: 4.9 / 5 (121 Google reviews, as of July 2026)
Location: Mesa (Ellsworth Rd) — Credentials: CPA
Best for: One-stop CPA practice for tax, bookkeeping and payroll
Website: mesquitetax.com
Mesquite Tax LLC operates out of 3035 S Ellsworth Rd, Suite 109, in southeast Mesa and runs a CPA practice covering taxes, bookkeeping, payroll and general accounting services. The firm handles S-Corp and LLC returns alongside individual preparation, with the CPA credential to back up the work on more complex filings. 4.9 across 121 Google reviews.
Tyler runs the practice and is reachable directly at (480) 288-6855 or tyler@mesquitetax.com — useful if you want to talk to the person who actually prepares the return. Good fit if you are in the Ellsworth corridor or east Mesa and want a single CPA handling the books, the payroll and the return without co-ordinating between separate providers.
4. Mesa Heights Accounting, LLC
Best for S-Corp and partnership returns
Rating: 5.0 / 5 (107 Google reviews, as of July 2026)
Location: Mesa (Preston St) — Credentials: Tax preparer
Best for: S-Corp and partnership returns with bookkeeping
Website: mesaheightstax.com
Mesa Heights Accounting is led by Seth McRae at 6730 E Preston St, Unit 49, in northeast Mesa. The firm lists 1040s, 1065s (partnership and multi-member LLC) and 1120-S (S-Corp) returns as core service lines alongside bookkeeping and LLC creation assistance — one of the few firms on this list that names the specific form types it handles rather than just saying "business taxes."
5.0 across 107 Google reviews — a perfect rating at meaningful volume. Phone: (928) 322-1076. If you are a sole proprietor considering forming an LLC or electing S-Corp status, Mesa Heights can set up the entity and then prepare the returns that follow. Less suited to complex, high-entity-count situations.
5. Arizona State Accounting Services, LLC
Best for east Valley coverage
Rating: 4.8 / 5 (230 Google reviews, as of July 2026)
Location: Mesa (Southern Ave) — Credentials: Tax preparer
Best for: High-volume prep across Mesa, Gilbert and San Tan
Website: azstateaccounting.com
Arizona State Accounting Services sits at 1819 E Southern Ave, Suite E-10, concentrating on personal and small business income tax return preparation alongside bookkeeping, payroll, TPT filing, new business setup and consulting. The firm explicitly serves Mesa, Gilbert and the San Tan area — useful if you operate across those cities and want one preparer who understands each municipality's TPT rates.
4.8 across 230 Google reviews — the second-highest volume on this list. Aaron is named in client testimonials as the person handling both business returns and the ongoing client relationship. Phone: (480) 868-2933. Solid choice when you need reliable preparation with payroll and TPT bundled in and do not need advisory layered on top.
6. Haga Kommer, CPAs
Best for multi-state businesses
Rating: 5.0 / 5 (80 Google reviews, as of July 2026)
Location: Mesa (Baseline Rd) — Credentials: CPA (multi-office firm)
Best for: Businesses with multi-state exposure
Website: hagakommer.com
Haga Kommer is not a Mesa-only practice — it is a multi-office CPA firm with locations across several states, including its Mesa branch at 4824 E Baseline Rd, Suite 112. That matters if your small business has employees, sales or nexus beyond Arizona, because the firm already operates in those jurisdictions rather than referring you out.
5.0 across 80 Google reviews for the Mesa location. The larger footprint means deeper bench depth than a sole-practitioner shop, which helps during peak season or if your situation suddenly gets more complex — say you open a second location in Colorado or Texas. Less of an advantage if your business is Mesa-only and you prefer a solo practitioner who knows you by name.
7. Law and Reed, CPA, P.C.
Best for entity structuring
Rating: 4.7 / 5 (68 Google reviews, as of July 2026)
Location: Mesa (Baseline Rd) — Credentials: CPA
Best for: Business entity structuring alongside tax prep
Website: lawreed.com
Law and Reed operates at 6955 E Baseline Rd, Suite 107, offering tax preparation and planning, bookkeeping, payroll, notary services and — notably — business entity structuring as a named service line. That matters if you are choosing between LLC, S-Corp and C-Corp status, or restructuring an existing entity to change how income flows to your personal return.
4.7 across 68 Google reviews. Phone: (480) 827-0370. Year-round operation with an online client portal for document exchange. A practical pick when your preparation needs come with an open question about whether your current entity structure is still the right one — the prep and the restructuring happen under the same roof.
8. Eaglecrest CPA Tax
Best for owner-operated businesses
Rating: 4.9 / 5 (29 Google reviews, as of July 2026)
Location: Mesa (Falcon Dr) — Credentials: CPA
Best for: Owner-operated businesses with multi-location operations
Website: taxcpaexperts.com
Eaglecrest CPA Accounting and Tax runs out of 4711 E Falcon Dr, Suite 231, handling personal and business tax preparation alongside small business accounting services. Published client testimonials name specific business owners — including the operator of five Grease Monkey franchise locations across four states — which suggests verified experience with multi-location, multi-state small business returns rather than generic claims.
4.9 across 29 Google reviews. Phone: 480-813-0342. Smaller review volume than most firms on this list, but the specificity of the client base — franchise operators, plumbing contractors, small consumer brands — is a useful signal if your business profile looks similar and you want a CPA who understands multi-state filing.
9. Jasper Accountancy PLLC
Best for IT and MSP businesses
Rating: 5.0 / 5 (25 Google reviews, as of July 2026)
Location: Mesa (Inca St) — Credentials: CPA
Best for: IT and MSP businesses that want a niche-specialist CPA
Website: jasperaccountancy.com
Jasper Accountancy is a CPA-led, retainer-first practice founded in 2024 by Jordan, a licensed CPA specialising in managed service providers and IT channel businesses. Located at 1247 E Inca St in Mesa. The website includes purpose-built tools — S-Corp status calculators, employee vs. contractor comparisons and client profitability modellers — built specifically for tech business owners rather than a general audience.
5.0 across 25 Google reviews. Phone: 480-240-0194. The most narrowly focused firm on this list. If you run an MSP or IT services company, the niche expertise is hard to find elsewhere in Mesa. If you run a restaurant or a plumbing company, this is not the right fit — the entire practice is built around a different model.
10. Servicios Liberty, LLC Mesa
Best for bilingual tax preparation
Rating: 5.0 / 5 (475 Google reviews, as of July 2026)
Location: Mesa (Dobson Rd) — Credentials: Tax preparer
Best for: Spanish-speaking business owners needing bilingual prep
Website: serviciosliberty.com
Servicios Liberty operates at 310 N Dobson Rd, Suite 3, in Mesa with a second location on W Bethany Home Rd in Phoenix. The practice runs primarily in Spanish, covering federal and state tax preparation, ITIN applications and renewals, amendments, and immigration-related services.
5.0 across 475 Google reviews — the second-highest volume on this list, reflecting a high-throughput operation serving Mesa's large Spanish-speaking community. It sits at the end of a small business ranking because the published services lean toward individual returns and immigration rather than S-Corp, LLC or payroll work. But if you are a Spanish-speaking sole proprietor who needs bilingual service, the review depth here is unmatched in Mesa.
Specialty Awards
- Best high-volume tax prep shop — Fox Peterson Entrepreneurial Accountants
- Best for business returns — K&R Strategic Partners, CPAs & Tax Advisors
- Best bundled CPA practice (tax + books + payroll) — Mesquite Tax LLC
- Best for S-Corp and partnership returns — Mesa Heights Accounting, LLC
- Best for multi-state businesses — Haga Kommer, CPAs
- Best for IT and MSP businesses — Jasper Accountancy PLLC
- Best for bilingual tax preparation — Servicios Liberty, LLC Mesa
Questions to Ask Before You Hire
"Do you file the business return and the personal return, or just one?" An S-Corp or partnership generates a K-1 that flows into your 1040. If one firm files the business return and another does the personal, you are paying two preparers and hoping they co-ordinate. One team seeing both sides is almost always better.
"What happens between April and January?" A seasonal preparer collects documents in February and files by April. A year-round practice runs bookkeeping, payroll and quarterly estimates month by month. If your business generates transactions every month, the return is the output of twelve months of accounting — not a one-off project.
"Can you handle the bookkeeping and payroll in-house?" Bundling matters because the books feed the return. When the bookkeeper and the preparer are the same team, there is no reconciliation gap in March. When they are separate providers, someone is redoing work or trusting that nothing was miscategorised.
Frequently Asked Questions
What forms does a Mesa S-Corp need to file in Arizona?
An S-Corp files federal Form 1120-S and distributes Schedule K-1s to shareholders. At the Arizona level, it files Form 120S. Each shareholder then reports K-1 income on their personal Arizona Form 140. Arizona also offers an optional pass-through entity (PTE) tax election that lets the S-Corp pay state tax at the entity level — useful for owners who want to deduct state taxes above the $10,000 federal SALT cap.
Does my Mesa LLC owe Arizona's Transaction Privilege Tax (TPT)?
It depends on what the LLC does, not what it is. Arizona's TPT applies to specific activities like retail sales, contracting and restaurants. If your LLC sells tangible goods at retail or performs contracting work, you likely owe TPT. If you sell only professional services, you probably do not. The City of Mesa also levies its own TPT rate on top of the state rate.
When should a sole proprietor in Mesa consider electing S-Corp status?
The trigger is usually self-employment tax. A sole proprietor pays 15.3% SE tax on all net income. An S-Corp owner pays SE tax only on a reasonable salary and takes remaining profit as a distribution. The savings become meaningful around $60,000 to $80,000 in net profit, but the break-even depends on what a reasonable salary looks like in your role. An S-Corp also adds payroll and a separate tax return, so preparation costs go up. Run the numbers with your preparer before electing.
Is Arizona's 2.5% flat income tax applied to my business income?
Yes. Arizona taxes individual income at a flat 2.5% regardless of amount. If you operate as a sole proprietor, single-member LLC or S-Corp shareholder, your share of business income flows through to your personal return at that flat rate. Arizona does not impose a separate tax on pass-through business income — no graduated brackets, no surcharge.
Methodology and Sources
Sources: public Google Business Profile ratings and review counts, the firms' own published service pages and staff bios, and Arizona Department of Revenue TPT guidance, all accessed July 2026. Ratings change; re-verify before relying on them. This article is informational and is not tax advice — engage a licensed professional for your own situation.
