QuickBooks Solopreneur vs ExactSplit: general bookkeeping or a product built around the tax number

QuickBooks Solopreneur is bookkeeping software with an estimated tax feature. ExactSplit is a tax engine with bookkeeping around it. The order matters.

ExactSplit · Updated June 7, 2026

Two products with the priorities reversed

QuickBooks Solopreneur, the successor to QuickBooks Self-Employed, is a lighter version of QuickBooks for one-person businesses. It connects your accounts, categorizes transactions, tracks mileage, generates invoices, and shows an estimated quarterly tax figure. It is bookkeeping software with tax as a feature.

ExactSplit is the other way around. The tax calculation is the center of the product. Every constant in it is cited to the IRS notice or revenue procedure it came from, and the bookkeeping exists to feed that calculation accurately. Which one is right for you depends on which half of the job you are worse at.

The estimated tax feature, compared

QuickBooks shows a quarterly estimate. What we can say from the outside is that it is a general purpose bookkeeping product and the estimate is one feature among many. What we can say about ExactSplit is precise, because it is ours.

The engine computes self-employment tax with the 92.35 percent base and the 400 dollar statutory floor, the 2026 federal brackets from Revenue Procedure 2025-32, the section 199A deduction with the SSTB phase-out and the OBBBA 400 dollar minimum, and both safe harbor tests. It picks the lower of 90 percent of the current year projection and 100 or 110 percent of last year's tax, subtracts withholding, and splits by four. It explains which test won and why. The calculation is shown line by line, and the code behind it runs several hundred automated checks with hand-computed expected values.

Above the 199A threshold, where the wage limitation and SSTB rules get genuinely intricate, ExactSplit says so and flags the result for a CPA rather than showing a confident number that is only approximately right. We think that honesty is a feature.

What ExactSplit adds that a bookkeeping product does not

Reserve tracking. The estimate becomes a per-deposit rate. Each incoming payment gets an exact set-aside amount, the reserve account is watched, recorded payments are netted out, and a nudge fires when you fall a quarter behind. This is the difference between telling someone the number and checking that the money is there.

A retirement optimizer that solves the circular solo 401(k) employer contribution exactly and measures the saving by re-running the whole calculation, including the section 199A clawback that a bracket multiplication misses.

An S-corp crossover model that subtracts real costs, models the 199A effect in both directions, and finds the break-even at your own salary ratio, with every result flagged for a CPA.

A bookkeeping assistant that answers questions about your spending from tested arithmetic, infers trips from your ledger, and refuses to give advice.

Where QuickBooks wins

QuickBooks is a mature accounting product. It has invoicing, receipt capture, a much larger ecosystem of integrations, and an upgrade path into full QuickBooks Online if your business grows into needing payroll, inventory, or an accountant who lives in QuickBooks. If you need those things, or expect to, that path matters.

It has also been categorizing transactions for a very long time. Its merchant coverage on the first pass is broad. ExactSplit's classifier is deliberately conservative and learns your merchants through a rule table, which means the first sync will ask you more questions and the tenth will ask almost none.

ExactSplit's invoicing and receipt capture are on the roadmap rather than in the product today. If you need them now, QuickBooks has them.

Mileage, specifically

Both products track mileage. ExactSplit's approach is stricter. Every trip is priced by its own date, which matters in 2026 because the rate changed from 72.5 to 76 cents on July 1 and a single annual rate is wrong for every trip on the other side of that line. All four section 274(d) substantiation fields are required before a trip is saved, because a trip missing one is not a smaller deduction, it is none. And if you also have fuel or repair transactions marked deductible, the mileage section tells you that is a double count.

The export

Both products can produce something a preparer can use. ExactSplit's Schedule C export is built around what a preparer actually wants: every transaction with its assigned Part II line so they can re-sort in a spreadsheet, a summary by line, the mileage log with citations, and the caveats written into the file itself. Cash income, unlinked cards, unpaid invoices, cost of goods sold, and the home office deduction are all stated as missing, because a bank feed cannot see them and the person opening the CSV in March never saw the app.

What has been added since

Since this was written, ExactSplit has added the pieces a bookkeeping product would normally claim as its territory, but built around the tax number rather than beside it. A closings pipeline for real estate agents feeds expected commissions into the projection before they land. A safe-to-pay-yourself figure nets tax, upcoming bills and a buffer out of the operating balance. And an accountant view lets the person preparing your return ask about a transaction where it sits, request the documents they need, and approve each quarter's figure.

QuickBooks has an accountant view too, and it is more complete as a ledger. Ours is narrower on purpose: it shows the numbers that drive the tax estimate and the transactions behind them, and it records a sign-off on the quarterly figure, which is the thing a ledger view does not do.

The short version

If you need a general ledger with invoicing and an upgrade path into full accounting software, QuickBooks Solopreneur is the safer choice. If your actual problem is the tax number, the money behind it, and the planning decisions around it, that is what ExactSplit is built for, and the bookkeeping is there to serve it.