Comparison · updated monthly
Online Taxman is a boutique US-CPA firm for expats and businesses. It's a done-for-you service — there's no self-serve product and no free draft.
Online Taxman presents CPA-led expat and business tax services; verify its current credentials, scope, and quote directly. Atamatax is self-serve software with flat per-package pricing: supported on-screen PFIC calculations are free and draft-package generation is paid.
Who Online Taxman is for
Online Taxman fits expats who want a real CPA to handle everything for them — especially business owners with foreign corporations, complex multi-year situations, or anyone who'd rather hand it off than touch a form. If you want a human to own the return end to end, that's their genuine strength.
Side-by-side
Delivery model
- Atamatax
- Self-serve software you drive yourself.
- Online Taxman
- Done-for-you preparation by a CPA.
Pricing
- Atamatax Winner
- $299 / $499 / $799 flat per return, shown upfront.
- Online Taxman
- Quote-based / per-service; varies by complexity.
Free on-screen summary before paying
- Atamatax Winner
- Yes — see computed draft numbers before purchasing the package.
- Online Taxman
- No free draft; engagement starts on quote acceptance.
Form 8621 (PFIC)
- Atamatax Winner
- Built-in; up to 25 per return.
- Online Taxman
- Handled by the CPA as part of the engagement.
FBAR + FATCA (Form 8938)
- Atamatax
- Generated in the same flow.
- Online Taxman
- Prepared by the firm.
Treaty positions (Form 8833)
- Atamatax
- Dedicated FR / UK / DE / CA / AU desks.
- Online Taxman
- Handled case-by-case by a CPA.
Turnaround speed
- Atamatax Winner
- Same-session draft; generate the package on your schedule.
- Online Taxman
- Depends on firm capacity and back-and-forth.
Business / foreign-corp complexity
- Atamatax
- Refers complex cases to independent CPAs.
- Online Taxman Winner
- Core strength — CPAs handle business filings.
Human CPA judgement on edge cases
- Atamatax
- Software; refers truly complex cases out.
- Online Taxman Winner
- Real CPAs on every return.
The marked column indicates which product handles the feature more completely as of July 2026. We update this page when their offering changes — tell us if it's out of date.
Bottom line
Atamatax supports a narrower self-serve foreign-account and PFIC workflow; it does not prepare foreign-business forms, promise an independent CPA referral, or complete and file the return. Verify Online Taxman's current services, reviewer, timing, and fees directly.
Try it free
The on-screen draft is free. You pay when you generate the PDF package.
Start the wizard, see your real numbers, and decide from there.