Best Professional Tax Software for 2026

AICPA members preparing 2025 returns still skew toward three names. UltraTax CS holds a 22.3% share, Lacerte 16.7%, and Drake Tax 14.3%, according to The Tax Adviser's 2026 survey of 1,808 members. That is a snapshot of market share, not a buying guide. The real decision axis for a firm is pricing structure plus firm size. Features matter, but most of these packages cover the same core federal and state forms. What separates them is how you pay: a flat annual license, a per-return fee that gets cheaper with volume, or a custom quote with no public number at all.

This article covers the full professional suites that firms install or run as their primary preparation engine, including desktop-capable programs. For simpler needs, a separate guide on browser-only cloud tax prep is coming. Start with the pricing model, then work through each product. If you are also evaluating AI tools for your firm, the wider AI-tools-for-accountants guide is the hub for that.

Pricing model buckets

Professional tax software splits into three pricing structures. The first is a flat unlimited license. You pay one annual fee and prepare as many returns as you want, with no per-return charge. Drake Tax and TaxSlayerPro sit here. The second is per-return pricing, where the cost per return drops as volume climbs. Lacerte Pay-Per-Return, ProConnect Tax, and Juno fall into this bucket, though Juno is an AI data-extraction layer rather than a full preparation engine. The third is a fully custom quote. UltraTax CS and Onvio publish no public price; Thomson Reuters sizes the quote to your firm's users, return mix, jurisdictions, and modules.

This structure is the first filter. A solo preparer doing 200 returns a year will read a flat unlimited license differently than a 20-preparer firm doing 4,000 returns. Keep the bucket in mind as you go product by product.

Lacerte Tax software

Lacerte is Intuit's desktop workhorse for firms, a Windows install with an optional paid remote hosting add-on. The Pay-Per-Return tier costs $599 a year for the license, then $105 per 1040 with one state and $148 per business return for 1120, 1120-S, 1065, 1041, or 990, according to Intuit's pricing page. Gift tax returns 706 and 709 run $99 each. Extra states add $103 for individual returns, $98 for business, and $146 for consolidated corporate returns.

An Unlimited tier exists, but Intuit publishes no price for it; you request a custom quote. Bundle pricing starts around $1,495 per user per year, and the current TY2026 promo takes 35% off bundles with free 2025 extension returns. Lacerte's scale is real: 7,200+ forms, 25,000+ diagnostics, Intuit Link client portal, Intuit Tax Advisor, Intuit Sign, automated K-1 delivery, and Quick Employer Forms.

Drake Tax

Drake Software sells Drake Tax as a desktop install or a cloud variant called Drake Tax Online. The TY2026 promo pricing through November 30, 2026 breaks into tiers. Pro multi-user is $3,295 a year for unlimited individual and business returns. The 1040 multi-user tier is $2,445 a year for unlimited individual returns, with business returns at $74.99 each. Pay-Per-Return multi-user is $379.99 including 10 individual returns, then $49.99 per individual and $74.99 per business return, all from Drake's pricing page. All 50 states are included at every tier, and Drake includes free data conversion from competing software.

The AICPA survey backs Drake's positioning. Drake Tax and Lacerte tied for the highest overall satisfaction rating at 4.4 out of 5. Drake led update quality at 4.7 and price satisfaction at 86% top-like. Among sole practitioners, Drake Tax and ProSeries together account for roughly half of all users.

UltraTax CS

UltraTax CS is Thomson Reuters' flagship for the CS Professional Suite, a desktop install that covers 1040, 1120, 1120-S, 1065, 1041, 706, 709, 990, and 5500 forms, with 371+ e-file jurisdictions. The workflow is built around single-entry data sharing, so a client's information entered once flows across their related returns, and the interface supports a four-monitor layout for preparers who want everything visible at once. Integrations include 1040SCAN, SPbinder, Onvio, and SafeSend One. Cloud add-ons exist for e-filing (CS Connect) and hosting (Virtual Office CS), but the core is a desktop program.

Thomson Reuters publishes no price for UltraTax CS anywhere. You request a quote sized to your users, return types, jurisdictions, and modules. The AICPA data shows why big firms accept that: UltraTax CS is the only product that holds a share above 30% at firms with 500+ preparers, and its usage is distributed more evenly across firm sizes than any competitor.

ProConnect Tax

ProConnect Tax is Intuit's cloud-only professional suite, browser-based with no install and a separate codebase from Lacerte. It covers 5,700+ forms across 1040, 1120, 1120-S, 1065, 1041, and 990, and includes Intuit Sign and Intuit Tax Advisor. One detail sets it apart from every other product here: the vendor names each tier by the number of returns it includes per year, rather than selling a flat license.

The Essentials 50 tier lists at $3,700, discounted to $2,478. Essentials 100 lists at $5,957, discounted to $3,842. Plus, a two-user tier, lists at $8,802, discounted to $5,868. Advanced, multi-user, lists at $12,792, discounted to $8,462. Firms doing 400+ returns a year move to Enterprise at a custom quote. Pay-as-you-go individual returns run $109.95 list, $82.46 discounted, dropping to $32.21 at 200+ volume. Business returns run $129.95 list, $97.46 discounted, dropping to $35.21 at 200+ volume. A User Access License is $210 per user per year, or $2,100 flat for 10+ users, all per Intuit's pricing page.

Onvio

Onvio is not a competing return-preparation engine, despite how many generic roundups frame it. Thomson Reuters positions Onvio as firm management software: document management, client portal, project tracking, and time and billing. Vendor copy describes it as a document flow companion to UltraTax CS, not a standalone prep replacement. A prior Onvio Tax beta reference could not be confirmed still live.

Pricing is demo-request only, with zero public price. If you are comparing prep engines, Onvio belongs in a different column. It does not compete with UltraTax CS; it feeds documents into it.

TaxSlayerPro

TaxSlayerPro is TaxSlayer's preparer line, separate from the consumer product. Classic is the desktop version, and Web is the browser version with no install. Premium adds business entities. Classic includes 3,500+ forms. Pricing here is secondary-sourced because TaxSlayer's site returned an error on direct fetch; two independent aggregator lookups agreed on the figures, but treat them as approximate rather than exact vendor-confirmed numbers.

Classic runs $1,395 a year, promo $1,195, with unlimited 1040-series federal and state e-file and no per-return fee. Web runs $1,595, promo $1,395. Premium runs $1,695, promo $1,495, adding 1065, 1120, 1120-S, 990, 1041, 706, 709, and 5500 forms plus document management and client texting. All 50 states plus DC are included at every tier, with no per-return charges. Third-party reviews often position TaxSlayerPro as the budget alternative to Drake and Lacerte for small firms and solo preparers.

Juno Tax software

Juno is a different kind of product. It is an AI data-extraction layer that sits alongside an existing preparation engine rather than replacing it. Juno works alongside Drake, Lacerte, ProConnect, and CCH Axcess. It has three modules: Preparer, Reviewer, and Advisor. The tool reads client source documents, extracts the data, and feeds it into whichever engine the firm already runs, targeting 90 to 95 percent automation of data entry and handling K-1 processing.

Pricing is a flat per-return fee with no complexity surcharge; the vendor charges one rate whether the return is a simple 1040 or a multi-K-1 partnership. The site has an interactive price slider but no fixed published number, and custom or volume pricing applies above roughly 2,500 to 3,500 returns a year. A free trial includes five preparations with no card required. Juno raised a $12 million seed round announced April 13, 2026, led by Bonfire Ventures with Impression Ventures and X Fund participating, per CPA Practice Advisor. Founder and CEO is David Haase.

The buyer for Juno is someone who has already selected one of the other six packages. It is not a first purchase; it is an efficiency layer on top of an engine you already run.

Firm-type decision framework

Start with what you already are, not what you want to become.

A solo preparer or very small firm starting out should look hard at the flat unlimited bucket. Drake Tax's 1040 multi-user tier at $2,445 a year with unlimited individual returns is the simplest economics in this list. TaxSlayerPro Classic at roughly $1,395 a year is cheaper still, though the pricing is secondary-sourced. Both cover all 50 states with no per-return charge, which removes the mental math from every new client. The AICPA satisfaction data supports Drake here: highest update quality and price satisfaction, tied with Lacerte for overall satisfaction.

A small firm with growing volume, say 500 to 2,000 returns a year, should do the arithmetic on per-return pricing. Lacerte Pay-Per-Return at $105 per individual return and $148 per business return looks expensive on its face, but the $599 yearly license is trivial, and the per-return cost gets manageable as volume climbs. ProConnect Tax's tiered pricing is even more explicit: Essentials 100 at $3,842 discounted covers 100 returns, which works out to about $38 per return before adding states and users. At 200+ pay-as-you-go individual returns, ProConnect drops to $32.21 per return. The breakpoint is real; compute it for your mix.

A firm that wants an AI data-entry add-on on an existing engine should evaluate Juno, but only after the engine itself is chosen. Juno's flat per-return pricing, no complexity surcharge, and 90 to 95 percent automation claim are pitched at firms doing volume. The $12 million seed round and three modules (Preparer, Reviewer, Advisor) signal a product built for firms that already run Drake, Lacerte, ProConnect, or CCH Axcess. You are not choosing between Juno and Lacerte; you are choosing whether to layer Juno on top of Lacerte.

A large multi-office firm with 500+ preparers has different constraints. UltraTax CS is the only product with 30%+ share at that size in the AICPA data, and its single-entry data sharing and four-monitor layout support a high-volume, multi-monitor workflow. The custom quote is not a bug; at that scale, pricing depends on your return mix, jurisdictions, and module count, and Thomson Reuters builds the quote around that. Onvio fits here as the document management layer that feeds UltraTax CS, not as a separate prep engine.

If you would rather get a shortlist than work through the comparison by hand, the CurateSuite matchmaker can point you to the tools that fit your firm's size and pricing model.

How each product charges

Pairing with an AI layer

Once the engine is chosen, the next decision is what sits on top of it. Portal and workflow tools pair with any prep engine, and some vendor copy names specific fits. Canopy, for example, is a portal tool whose vendor materials name Drake, ProConnect, and UltraTax specifically. TaxDome, on the other hand, does not restrict itself to a particular engine's integration catalog; its own connections are limited to QuickBooks, Xero, Zapier, Stripe, Gmail, and Outlook, with no tax-prep engines listed. StanfordTax pulls prior-year data from Lacerte, UltraTax CS, Drake, ProConnect, and ProSeries, and personalizes intake checklists, with a free tier and no client minimum on its Free and Premium plans. Soraban pushes extracted client data into Lacerte, UltraTax, Drake, and ProSeries, with vendor-claimed 97 percent accuracy at volume. If you are weighing these portal and workflow layers, the practice management guide walks through the full landscape.

Research tools are a second layer. TaxGPT connects to Drake, ProConnect, and UltraTax, so you can run research next to the return you are preparing. CoCounsel Tax is a standalone AI research assistant from Thomson Reuters that shares the Checkpoint content library; it is sold and priced as its own product, not bundled with UltraTax CS. Juno is the same idea applied to data entry rather than research: an AI layer that assumes you already made your engine decision. Do not buy the AI layer before the engine; buy the engine, then layer AI on top. You can browse the full tax compliance and research category to see what else fits this layer.

Common questions

Is ProSeries the same as ProConnect Tax?

No. ProSeries is a separate Intuit product, and the AICPA survey shows ProSeries at 11% share among members, which puts it ahead of ProConnect Tax's 4.4% in that data. ProSeries is outside the scope of this article's main sections, because it is a different product line with different pricing, but the two are distinct: ProConnect Tax is the cloud-only professional suite with tiered per-return pricing, while ProSeries is a separate legacy desktop line. If you see ProSeries mentioned in the AICPA data, do not read it as a ProConnect number.

Which products publish real, non-custom pricing?

Drake Tax, Lacerte Pay-Per-Return, and ProConnect Tax all publish specific dollar figures. TaxSlayerPro's numbers are secondary-sourced because the vendor site returned an error on direct fetch, so treat those as approximate. Juno publishes a pricing slider but no fixed dollar figure, and volume/custom pricing kicks in at higher return counts. UltraTax CS and Onvio publish no public price at all; both require a custom quote.

What is Onvio if it is not a competing prep engine?

Onvio is Thomson Reuters' firm management software: document management, client portal, project tracking, and time and billing. Vendor materials describe it as a companion to UltraTax CS for moving documents through the workflow, not as a standalone return-preparation replacement. A number of generic roundups describe Onvio as a direct competitor to UltraTax CS for preparation, but Thomson Reuters' current product materials do not back that up. If you are choosing a prep engine, Onvio does not belong in that column; it belongs in the document and workflow column that feeds the engine.

Are the AI add-ons locked to one engine, or can a firm pick its own prep software?

Some are tied to a specific engine, and some are not. CoCounsel Tax is a standalone AI research assistant from Thomson Reuters that shares the Checkpoint content library; unlike a native integration, a firm can run it regardless of which prep engine it uses. TaxGPT connects to Drake, ProConnect, and UltraTax, so it works across multiple engines. Juno works alongside Drake, Lacerte, ProConnect, and CCH Axcess, so it is engine-agnostic in that set. Portal and workflow tools like Canopy, StanfordTax, and Soraban all list multiple engine integrations, so they do not lock you to one vendor. TaxDome is also a portal option, though it does not list multiple engine integrations. Check the integration list against your engine before you buy any of them.