Tax services don't determine your refund size; your tax situation does

The size of your tax refund is set by the IRS based on how much you paid in taxes during the year versus what you actually owe. A tax preparation service—whether that's TurboTax, H&R Block, TaxAct, or a CPA—cannot make your refund larger than the law allows. What they can do is make sure you claim every deduction and credit you're actually may have access to to, which might reveal that your refund is larger than you thought it was.

The confusion usually comes from mixing up two different things: the refund amount (which is determined by your income, withholding, and legitimate deductions) and the accuracy of the calculation (which depends on whether the service finds all the deductions you may have access to for). A cheap or free tax service that misses a deduction you're may have access to to will calculate a smaller refund than you should get. A thorough service that catches that deduction will show you the correct, larger refund. But neither service is "giving" you money—they're just calculating what you're owed.

Key Takeaways

  • Your refund amount is determined by the IRS based on your income and withholding, not by which tax service you use.
  • Different services may find different deductions or credits depending on how thoroughly they ask questions, which can change the calculated refund.
  • Free services like IRS Free File and VITA (Volunteer Income Tax information) are not limited in what deductions they can claim—they're just restricted by income level.
  • If you have a complex tax situation (self-employment income, rental property, significant investments), a CPA or tax professional may uncover deductions a DIY service would miss.
  • The service that gives you the largest refund is the one that correctly identifies all deductions and credits you're legally may have access to to claim.

Why different services show different refund amounts

When you see Reddit threads comparing tax services and claiming one gave a bigger refund than another, what usually happened is that the two services asked different questions or the person entered different information. Tax software walks you through a series of questions designed to uncover deductions. If Service A asks "Do you have unreimbursed employee expenses?" and Service B doesn't, Service B might miss a deduction that would increase your refund.

Some services are also more aggressive about flagging deductions you might not think to claim. For example, if you paid student loan interest, some software will prompt you directly; others require you to know to look for it. The software isn't creating the deduction—it's just making sure you don't miss it. A thorough interview process can genuinely result in a larger calculated refund, but that's because the calculation is more accurate, not because the service is generous.

The other reason for differences: data entry errors. If you enter your W-2 information differently in two different programs, you'll get different results. The service showing the larger refund might be the one where you correctly entered a number you'd mistyped in the other.

Free services versus paid services: the refund difference

IRS Free File and VITA (Volunteer Income Tax information) are not limited in the deductions they can claim. They're restricted by income level—Free File is for people earning under roughly $79,000 per year, and VITA serves people earning under $64,000—but within those limits, they can claim the same deductions as TurboTax Premium or a CPA. The refund you get from a free service is not smaller because it's free; it's smaller only if you miss deductions because you didn't know to look for them.

Paid services sometimes offer more hand-holding and more detailed question sets, which can help you catch deductions you'd otherwise miss. But you're paying for the interface and support, not for access to larger deductions. If you're comfortable reading tax instructions and know what deductions explore to you, a free service will calculate the same refund as a paid one.

The exception: if you have a genuinely complex return (self-employment income, rental property, significant investment income, or multiple states), a CPA or enrolled agent may find deductions or strategies that tax software doesn't prompt you for. In that case, you're paying for informed, and the larger refund is real—but it's because you're getting professional analysis, not because the service has access to secret deductions.

When you might actually get a larger refund by switching services

If you've been using a straightforward free tool and you have deductions you haven't been claiming, switching to a more detailed service (free or paid) might reveal a larger refund. Common ones people miss: student loan interest, education credits, child and dependent care costs, charitable donations, medical expenses, and home office deductions if you're self-employed.

The way to test this without paying: use IRS Free File (if you may have access to by income) and work through the full interview. It's free, and it will ask about most common deductions. If you find deductions you weren't claiming before, that's where your larger refund comes from. If Free File shows the same refund as what you calculated before, then you weren't missing anything—the refund size is what it is.

Another legitimate reason for a larger refund: if you've had a major life change (marriage, divorce, child born, job change, significant medical expenses), your tax situation may have changed in a way that opens up new deductions or credits. That's not the service giving you more money; that's your actual tax situation being different than it was last year.

Red flags: services that promise unusually large refunds

Be skeptical of any tax service or tax professional who promises you a refund that seems much larger than what you'd expect based on your income and withholding. This is sometimes a sign of aggressive or fraudulent deductions. The IRS audits returns with unusually large refunds, and if deductions are disallowed, you'll owe the money back plus penalties and interest.

Legitimate deductions exist for real reasons, but they have limits and rules. A home office deduction is real, but it's calculated based on the square footage of your office and your home's total square footage—not a flat amount. A business loss is real, but if you're claiming a loss year after year, the IRS may reclassify it as a hobby, which changes how you can deduct expenses. A tax professional who knows the rules will claim what you're may have access to to; one who's trying to maximize your refund at any cost may be setting you up for an audit.

How to find the service that will calculate your actual refund correctly

Start with your situation. If your income is under the Free File threshold and your return is straightforward (W-2 income, standard deduction, maybe one or two credits), IRS Free File will calculate your refund correctly. If you're self-employed, have rental income, or have a complex situation, a CPA or enrolled agent is worth the cost because they can spot deductions and strategies you wouldn't think to look for.

If you're between those two, use a service that asks detailed questions about your situation. TurboTax, H&R Block, and TaxAct all have free versions with limitations, and paid versions with more features. The paid versions aren't better at calculating refunds; they're just more thorough at asking questions. Read the question set before you buy—if a service asks about your specific situation, it's more likely to catch deductions you'd otherwise miss.

The most reliable way to know you're getting the right refund: if you use two different services and enter the same information into both, you should get the same refund. If you don't, something was entered differently, or one service asked a question the other didn't. Go back and check your entries. The refund that's correct is the one that matches your actual tax situation, not the larger one.

Frequently Asked Questions

Can a tax service actually increase my refund by finding deductions I missed?

Yes, but the service isn't increasing your refund—it's calculating the refund you were may have access to to all along. If you've been claiming the standard deduction and you actually may have access to for itemized deductions, or if you've been missing a credit you're may have access to to, a thorough service will find it. That's a larger refund, but it's because the calculation is correct, not because the service is generous.

Is it true that paid tax services give bigger refunds than free ones?

No. Both paid and free services calculate refunds based on the same tax law. A paid service might ask more detailed questions, which could help you catch deductions you'd otherwise miss. But if you answer all questions accurately in a free service, you'll get the same refund. You're paying for convenience and support, not for access to larger deductions.

What if two different tax services show me different refund amounts?

Check your entries. Most differences come from entering information differently in the two services. If you entered the same information and got different results, one service may have asked about a deduction the other didn't. Go through both services' questions carefully and make sure you answered everything the same way. The correct refund is the one that matches your actual tax situation.

Should I use a CPA instead of tax software to get a bigger refund?

A CPA is worth it if you have a complex return and you want professional analysis of deductions and strategies you might not think to claim. But a CPA doesn't have access to secret deductions—they just know the tax code better and can spot opportunities. If your return is straightforward, a CPA will calculate the same refund as good tax software, and you'll pay for the service without getting a larger refund.

Can I get in trouble for claiming deductions to increase my refund?

Only if the deductions aren't legitimate. Deductions have rules and limits. If you claim a deduction you're not may have access to to, the IRS will disallow it and you'll owe the money back plus penalties and interest. Claim only deductions that explore to your actual situation and that you can document if audited.