Key Tax Vocabulary

Elena sat down for her first appointment at Taxes Etc. She handed over her W-2 and waited.

Ralph asked a few questions. Filed status. Did she have her daughter full time? Did she pay her own rent? Any other income? Any tips not on the W-2?

Elena didn’t understand half of what he was asking. “What do you mean gross income?” she asked. “What’s a filing status?”

Ralph put down his pen. “Okay. Let me back up. Let me explain what we’re actually doing here.”

That conversation — where you stop and define the words before you keep going — is one of the most important things you can do for a client. Tax language is intimidating. It doesn’t have to be. Once someone understands what the words actually mean, the whole thing gets a lot less scary.

These are the words you’ll use every single day. Learn them so well you can explain any one of them in thirty seconds to someone who’s never heard it before.

These three words all mean “income” but they mean very different things. This confusion trips up clients constantly.

Gross Income is everything you made before anything came out. Every dollar. All wages, all tips, all gig earnings, all business income added together. This is the top-line number. When Marcus says “I made $49,000 this year,” he means his gross income — $38,000 from Amazon plus $11,000 from Uber.

Adjusted Gross Income (AGI) is your gross income after certain specific deductions come off the top. Things like a contribution to a retirement account, student loan interest, the deductible portion of self-employment tax. This is the IRS’s way of getting to your “real” income before your personal situation is applied. AGI shows up on line 11 of the 1040 and a lot of other calculations use it as a starting point.

Taxable Income is what’s left after the standard deduction comes off your AGI. This — right here — is the number the IRS calculates your actual tax on. Not your total earnings. Not your take-home pay. Just this number. For most clients it’s significantly lower than what they made.

Anthony made $55,200. His tax is calculated on $37,840. That’s a $17,360 difference — income that the IRS does not tax because of his retirement contribution and standard deduction.

New preparers mix these up. Don’t. They work completely differently and the difference is significant money for your clients.

A deduction reduces your taxable income. It’s like a discount on the income your tax is calculated on. If you’re in the 22% tax bracket and you get a $1,000 deduction, you save $220. Not $1,000. Twenty-two percent of $1,000.

A credit reduces your actual tax bill, dollar for dollar. A $1,000 credit cuts $1,000 off your tax bill. Full stop. Not a percentage. The whole thing. Credits are almost always more valuable than deductions of the same amount.

Some credits are refundable — meaning even if you owe zero tax, they can still put money in your pocket. The Earned Income Credit is refundable. That’s how Elena walked out with $3,754 even though she barely owed any income tax. The credit added real money on top of her already-small bill.

Anthony doesn’t write the IRS a check in April for his whole tax bill. He pays it a little bit at a time all year — automatically, through withholding. His employer takes money out of every paycheck and sends it to the IRS on his behalf. By the time April comes, he’s already paid most or all of what he owes.

The W-4 form he filled out when he started at Amazon tells the employer how much to take out. If the withholding is set up right, he’ll either break even or get a small refund. If it’s off — like when his bonus changed the math — he ends up with a balance due.

A refund means too much was withheld. The IRS gives back the overpayment. It is your client’s own money. Not a bonus. Not a gift. Their money that sat with the IRS all year.

A balance due means not enough was withheld. Or the client had income with no withholding at all — like Marcus’s Uber earnings.

Filing status is the category the IRS uses to set your standard deduction, your tax rates, and your eligibility for certain credits. There are five: Single, Married Filing Jointly, Married Filing Separately, Head of Household, and Qualifying Surviving Spouse.

This matters enormously. The standard deduction for Head of Household is $22,500. For Single it’s $15,000. Same person, same income — wrong status costs $7,300 in deductions.

Elena has been filing Single for years. She qualifies for Head of Household because she’s single, pays her own rent, and her daughter lives with her full time. Using the right status changed everything about her return.