Side by side

NTO Software vs Sigma Tax Pro

Both stand on small business tax software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

NTO Software

Paid WebWindows

NTO Desktop covers many individual, corporate, fiduciary, and nonprofit filing forms, with e-filing and paperless document handling. Its refund-transfer partnerships and retention reporting add operational tools for tax practices, while pricing is paid.

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Sigma Tax Pro

Paid Web

Sigma Tax Pro offers tools for individual and business tax preparation, with desktop and web options for 1040-TW and 1040-SR. Preparers handling Forms 1120 or 1065 should account for the desktop requirement when selecting either product.

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The facts

	NTO Software	Sigma Tax Pro
Free plan	No	No
Open source	Not published	Not published
Runs on	Web, Windows	Web
Lowest paid plan	See the plans	Sigma 1040-SR: $495, paid once
Plans published	1	3
Maker	Not published	Not published
Website	nationaltaxoffice.com	sigmataxpro.com
On small business tax software	#16 of 30	#20 of 30

NTO Software: what it does well

Broad business entity support
Federal and state e-file
Prior-year import
E-signature and paperless workflow
Refund transfer options

What to know first

No free plan
Pricing starts from $599
Desktop plan lists price on request
Windows and web platforms only

Sigma Tax Pro: what it does well

Covers individual 1040 and business 1120 and 1065 forms.
Federal and state e-filing are available.
1040-TW includes diagnostics and instant calculations.
Mobile app supports document uploads, messages, and remote signatures.
Clients receive a dedicated account manager during tax season.

What to know first

No free plan.
Forms 1120 and 1065 require the desktop version of 1040-TW or 1040-SR.
1040-DR is listed at $895, paid once.
Some listed refund options use prepaid cards.

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