A CPA & EA Firm vs DIY Tax Software

DIY software is cheap and fine for simple situations. Once you have a business, an LLC, foreign ownership or multi-state activity, the math changes. Here is an honest comparison.

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What you get

CPA & EA-led · vs software

Licensed professional signs your return
Represents you before the IRS
Catches deductions software misses
Year-round support, not just April

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DIY tax software is cheap and perfectly fine for simple situations. Once you have a business, an LLC, foreign ownership, or multi-state activity, the math changes. Here's an honest comparison.

When DIY software is genuinely the right call

If you have a single W-2, take the standard deduction, and have no business, DIY software is fast and cheap — and we'll tell you so honestly.

Simple W-2 returns with the standard deduction
No business, rental, foreign, or multi-state income
You're comfortable doing data entry and self-checking

What a licensed CPA & EA adds

The moment you add an LLC, S-corp, rental, foreign ownership, or multi-state income, the risk of an expensive mistake outweighs the savings.

A licensed professional signs your return
An EA or CPA can represent you before the IRS
A second reviewer catches what you'd miss
Year-round planning — entity choice, S-corp timing, estimated taxes

Not sure who should file? See CPA vs EA vs preparer.

Key takeaway: Use software for a simple W-2 return; bring in a CPA & EA the moment a business, rental, or foreign or multi-state income enters the picture.

Explore related help

US tax filing service · CPA vs EA vs preparer · Quarterly tax estimator · US tax filing checklist.

FAQ

Frequently asked questions

Is DIY tax software good enough for me?

If you have a simple W-2 return and no business, yes. Once you add an LLC, S-corp, rentals, or foreign or multi-state income, a CPA & EA usually pays for itself.

Can tax software represent me in an IRS audit?

No. Software may offer limited add-on support, but only a licensed CPA, EA, or attorney can represent you before the IRS.

Will a CPA find deductions software misses?

Often, yes. Software only captures what you enter, while a professional reviews your full situation and applies planning you might not know to ask about.

How much more does a CPA & EA cost than software?

More than software's flat fee, but the difference is usually small relative to the tax, penalties, or missed deductions a professional helps you avoid on a complex return.

Not sure which fits you?

Tell us your situation and we will give you an honest answer and a flat quote.