Keeper vs ExactSplit: finding write-offs is not the same as knowing what to pay

Keeper is built to find deductions in your transactions and file your return. ExactSplit is built to compute what you owe under the actual safe harbor rules, tell you what to hold back from every deposit, and check that you did. Different jobs.

ExactSplit · Updated June 26, 2026

What each product is for

Keeper's pitch, at the time of writing, is that it scans your linked accounts, spots deductible expenses you would have missed, and files your taxes at the end of the year. It is an expense discovery app with a filing service attached. If your problem is that you forget to deduct things, that is a real problem and Keeper is aimed squarely at it.

ExactSplit is aimed at a different problem. Most self-employed people are not undone by a missed deduction. They are undone in April by a number they did not see coming, or in June by a penalty notice for underpaying estimates, or in September by the realization that the money they meant to set aside is gone. That is a cash and timing problem, and finding another write-off does not solve it.

So the honest framing is not that one is better. It is that they answer different questions. Keeper answers what can I deduct. ExactSplit answers what do I owe, when, and is the money there.

How the estimate is built

Any app that shows you a quarterly tax figure has to make choices about how to compute it. The choices matter more than the interface.

ExactSplit computes the number the way a preparer would. Self-employment tax on 92.35 percent of net profit with the 400 dollar floor, the 2026 brackets from Revenue Procedure 2025-32, the section 199A deduction including the SSTB phase-out and the OBBBA 400 dollar minimum, and both safe harbor tests: 90 percent of the current year projection or 100 or 110 percent of last year's tax depending on last year's AGI. Every constant in the engine carries the notice it came from, and the code that computes it runs against several hundred automated checks with hand-computed expected values.

We cannot tell you how Keeper's estimate is built because it is not published. That is not a criticism. Most consumer tax apps treat the calculation as a black box. But if the estimate is what you are setting money aside against, you should be able to see the rule that produced it. ExactSplit shows the calculation line by line on the dashboard and prints the citations on the export.

What happens after the number

This is the part where the products diverge most. Both can show you a quarterly figure. Only one of them does anything with it.

ExactSplit turns the annual safe harbor into a per-deposit rate. When a client payment lands, it tells you the exact amount of that deposit to move into your reserve account. It watches the balance of that account, nets out the estimated payments you have recorded, and tells you the moment you fall a quarter behind. The number is not a report. It is an instruction, followed by a check that you carried it out.

As far as we can tell, no expense-finding app does this, because it is not what they are for. Their loop closes at filing time. Ours closes every time money moves.

Deductions, handled differently

Keeper's strength is aggressive deduction discovery. ExactSplit classifies every transaction too, against the trade you tell it, with a rule table that learns your merchants so one correction fixes every future charge from that vendor. Where the approaches differ is philosophy.

The classifier is instructed to prefer personal when a merchant is genuinely ambiguous, because an over-claimed deduction is worse for you than a missed one, and a missed one is fixed by a single tap. Mileage requires all four substantiation fields under section 274(d) before a trip is counted at all. The Schedule C export puts anything it cannot place with confidence on line 27a with the merchant name attached rather than forcing it into a named line that looks tidy and hides information. A preparer can redistribute 27a in minutes. What they cannot do is notice a subscription filed under utilities.

If you want an app that finds every possible deduction, that philosophy will feel conservative. If you want deductions that survive an examination, it is the right one.

The things ExactSplit does that are not in scope for an expense app

A retirement optimizer that solves the circular solo 401(k) employer contribution exactly, applies the 415(c) and 401(a)(17) caps, and measures the saving by re-running the whole tax calculation so the section 199A clawback is included rather than ignored. An S-corp crossover model that shows employment tax saved, subtracts payroll and return preparation and state franchise costs, and models the 199A effect in both directions with a break-even at your own salary ratio. Date-rated mileage across the 2026 mid-year rate change. A bookkeeping assistant that answers questions about your own spending from tested arithmetic and refuses to give advice.

None of that is a knock on Keeper. It is a list of what a product looks like when it is built around the number rather than around the filing.

Where Keeper wins

Keeper files. ExactSplit does not, on purpose. Filing pulls a product into the tax preparer regime, with PTIN and EFIN requirements and section 7216 obligations, and we have chosen to stay on the estimation side of that line and hand a finished file to your CPA instead. If you want one app that does everything through submission, that is a real advantage for Keeper.

Keeper also has years of head start on merchant coverage for deduction discovery. If your business has a long tail of unusual vendors, an app that has seen millions of transactions will catch more on the first pass.

Prices change and we would rather not quote a competitor's. Check both sites.

What has been added since

Since this was first written, ExactSplit has grown in three directions that sharpen the contrast. There is now a figure for what is safe to pay yourself between deadlines, computed from your operating balance less unfunded tax, upcoming recurring bills and a buffer. There is an accountant view: you invite them by email, they get a private link, they can ask about any transaction, request documents and sign off each quarter's figure. And when the reserve falls behind, the app proposes a transfer, you approve it, and the feed confirms it landed.

None of these are about finding deductions, which is still the thing Keeper does that we do not try to match. They are about the eleven months between filings, which is the thing we do that a filing product has no reason to.

The short version

If your pain is missed deductions and you want the return filed for you, look at Keeper. If your pain is not knowing what to pay, not having the money when the date arrives, and wanting the calculation you can actually see, that is what ExactSplit was built for.