If you are a one-owner S corporation filing your own Form 1120-S for tax year 2025 in 2026, the practical shortlist is short. TaxAct Business 1120-S is the cleanest online DIY path. H&R Block Premium & Business has the lowest verified sticker price if your state is on its short e-file list. TurboTax Desktop Business makes sense if you are already living in the Intuit ecosystem and don't mind paying more for the familiar interface. None of these is a substitute for a CPA if your S corp has payroll issues, multi-state income, shareholder basis problems, or a “we probably should have filed this last year” situation.
This is not a feature-list comparison. It is a true 12-month cost model — what a solo S-corp owner actually pays once you count the entity return, the personal return that has to absorb the K-1, and the state filings most pricing pages bury below the fold.
What actually has to get filed when you run an S corp?
Electing S-corp status doesn't replace your personal tax return — it adds one. The corporation itself files Form 1120-S, which reports income, gains, losses, deductions, and credits for the entity, and issues a Schedule K-1 to each shareholder. You, the owner, then report that K-1 information on your personal Form 1040. That's two filings, not one, and most software pricing pages only show you the cost of one.
For a calendar-year S corporation, the 2025 return (filed in 2026) is due March 16, 2026, since March 15 falls on a Sunday. Filing Form 7004 buys an automatic six-month extension, pushing that deadline to September 15, 2026. S corporations that file 10 or more returns in a calendar year — counted across all return types, not just 1120-S — are required to e-file, a rule effective for returns due on or after January 1, 2024. Miss the deadline by more than 60 days and the minimum penalty for 2026 filings is the smaller of the tax due or $525.
None of this changes based on which software you buy. What changes is how much you pay to get it done correctly, and how much hand-holding you get along the way.
The real question: what does filing actually cost over 12 months?
Every S-corp tax software page advertises one number. The number that matters is the sum of three things: the entity return (1120-S), the personal return that reports your K-1, and any state filings both returns require. We modeled this across three solo scenarios using only verified mid-2026 pricing.
Scenario 1: the $45K side-hustle S corp that maybe shouldn't be one yet
A $45,000-net operation carrying full S-corp compliance — payroll, a separate 1120-S, and possibly a second state registration — is the scenario where the decision that matters isn't which software to buy, it's whether the election is still earning its keep. Software costs here are almost a rounding error next to what payroll processing and a second tax return add every year.
If you're going to keep filing anyway, the cheapest verified DIY stack is H&R Block Premium & Business at $115, which includes five federal e-files and one state program (state e-file runs $19.95 except New York, and business e-file is only available in CA, CT, MI, NY, VA, and WI). TaxAct's dedicated 1120-S product runs $169.99 plus $69.99 per state — about $239.98 all-in for the business side alone, before you touch your personal return. FreeTaxUSA can pick up the personal K-1 reporting for $0 federal and $15.99 state, but it does not prepare Form 1120-S itself.
The honest advice at this income level: before optimizing software cost, get a CPA to confirm the S-corp election is still worth its compliance overhead. Run the actual numbers before renewing the structure, not just before picking a filing tool.
Scenario 2: the $90K consultant with clean books and one state
This is the sweet spot where S-corp compliance software genuinely earns its cost. Here's how the verified stacks compare.
| Stack | Business return | Personal return | Verified floor |
|---|---|---|---|
| H&R Block Premium & Business | Included in $115 | Included in $115 | ≈ $115 (+$19.95 if eligible state e-file used) |
| TaxAct 1120-S + FreeTaxUSA | $169.99 + $69.99 state | $0 federal + $15.99 state | ≈ $255.97 |
| TurboTax Desktop Business + Home & Business | $190 federal (state download separate) | $130 (1 state included) | ≈ $320 before business state download |
H&R Block wins on raw price, but only if your state is one of the six it supports for business e-file. TaxAct's online workflow is arguably better suited to a first-time S-corp filer since it says it supports every state that requires Form 1120S, and it pairs cleanly with a low-cost personal-return tool like FreeTaxUSA. TurboTax Desktop Business is the most expensive verified path once you add a personal-return product, and its business state download price wasn't listed clearly enough to verify here — check the live price before assuming a total.
Scenario 3: the $180K agency-of-one with contractors and multi-state exposure
At this income and complexity level, the price of the software stops being the risk. A missed state filing, a basis limitation you didn't catch, or an officer-compensation question you guessed on can cost far more than any software fee. TurboTax's Expert Assist Business for S-corps runs $639 plus state, and its Expert Full Service Business for S-corps runs $1,549 plus state — both let a professional review or fully prepare the return inside the TurboTax ecosystem. TaxAct's Xpert Full Service for S-corps, by contrast, is listed at $299 plus $69 for all states — a notably lower number for a comparable full-service outcome, though pricing on these assisted tiers moves and should be checked live before you commit.
Professional-grade platforms like Intuit ProConnect, Drake Tax, TaxSlayer Pro, and OLTPro also show up in searches for S-corp tax software, but they're built for people preparing other people's returns, not for a consultant filing their own. Their per-return pricing (roughly $75 to $130 per business return above a base license, or four-figure annual licenses) only makes sense at volume.
The shortlist, one product at a time
TaxAct Business 1120-S — best overall DIY pick
TaxAct's dedicated S-corp product lists at $169.99 plus $69.99 per state filed, checked mid-2026. It's built specifically for the 1120-S workflow rather than treating it as an afterthought to a personal-tax brand, and TaxAct says it supports every state that requires Form 1120S. There's also a paid-assist tier (Xpert Assist, around $258.99 plus state) and a full-service tier (around $299 plus $69 for all states) if you want a professional set of eyes without leaving the platform.
The limitation: TaxAct's own pricing has shown up inconsistently across its pages — one general business-returns page listed a different number than the dedicated S-corp product page — so treat any price you see as a snapshot, not a locked-in rate, and confirm it at checkout. It also doesn't touch your personal 1040; budget separately for that.
H&R Block Premium & Business — best price if your state qualifies
At $115 for 2025 returns, H&R Block Premium & Business is the lowest verified all-in price among mainstream desktop options, and it includes five federal e-files plus one state program. The catch is state e-file for business returns: it's only available in California, Connecticut, Michigan, New York, Virginia, and Wisconsin, with a $19.95 fee in most of those states. Outside those six states, you're printing and mailing a state business return, which changes the calculus fast if you're not in one of them.
TurboTax Desktop Business — best for Intuit loyalists, not the cheapest
TurboTax's dedicated entity-return product costs $190 for 2025 returns and includes five federal e-files, covering S-corps, C-corps, partnerships, multi-member LLCs, trusts, and estates. It's the most recognizable brand on this list, and it can generate W-2s and 1099s through its Quick Employer Forms feature. But the state download is sold separately at a price we couldn't verify from the public pricing page, and you'll still need a separate personal-return product — likely TurboTax Home & Business at $130 — to handle your K-1. Add those up and TurboTax is rarely the cheapest complete stack.
If you want a professional involved without leaving TurboTax, Expert Assist Business for S-corps runs $639 plus state, and Expert Full Service Business runs $1,549 plus state — both meaningfully pricier than the TaxAct equivalent, which is worth knowing before you assume the biggest name is the best value.
FreeTaxUSA — good for the personal side, not the S-corp return
FreeTaxUSA is genuinely cheap for 2025 personal returns — $0 federal, $15.99 state — and it supports reporting Schedule K-1 income on your individual 1040. But per FreeTaxUSA's own community support, it does not prepare Form 1120-S. Use it to pair with whatever handles your business return, not as a standalone S-corp solution.
Professional platforms — usually the wrong tool for a solo owner
ProConnect, Drake Tax, TaxSlayer Pro, and OLTPro exist for tax preparers filing multiple client returns, and their pricing structures reflect that. Drake's Pay-Per-Return, for example, runs $379.99 with 10 individual returns included and $74.99 for each additional business return — a fine deal for someone with a handful of clients, an odd choice for someone filing one return for themselves. If you're not preparing returns for other people or holding a PTIN, this tier of software is almost certainly overkill.
Skip DIY software entirely if any of this is true
Tax software prepares forms from the inputs you give it. It doesn't tell you whether your salary is defensible, whether you've blown through your basis, or whether you owe tax in a state you didn't know you had nexus in. Skip the DIY route and go straight to a CPA or enrolled agent if you have unfiled prior-year S-corp returns, income in more than one or two states, shareholder loans or distributions that exceed basis, a late S-election you're not certain was accepted, payroll you set up yourself and never fully trust, or losses you want to deduct beyond what you've invested in the business. None of that is a software problem — it's a judgment problem, and software has no judgment.
Where S-corp tax software fits in your financial OS
Tax-filing software sits in the Foundation layer of a solo operator's financial stack — it's compliance infrastructure, not a growth lever. It works best when the layers under it are already solid: clean books throughout the year (our QuickBooks review covers the bookkeeping tool most S-corp owners end up needing for CPA-ready statements), a tax-set-aside system that's been funding a holding account since January rather than in March, and clarity on how 1099-K and 1099-NEC income actually lands on your books — see our 1099-K guide if platform payments are part of your revenue mix. If you haven't mapped where tax prep fits relative to your other financial systems, our Financial OS framework walks through the full stack. And if you're still deciding whether the entity type makes sense at all, start with our self-employment tax guide before you start comparing 1120-S software.
Bottom line
For a straightforward one-owner S corp with clean books and one state, TaxAct Business 1120-S paired with a low-cost personal-return tool is typically the best balance of price and S-corp-specific workflow. H&R Block Premium & Business beats it on raw sticker price if you're in one of its six supported states for business e-file. TurboTax Desktop Business is worth the premium mainly if you're already comfortable in that ecosystem. And once your S corp has payroll wrinkles, multiple states, or basis complexity, the smartest purchase isn't software at all — it's an hour of a CPA's time before you file anything.