Tax Deductions vs. Tax Credits
Frequently confused. Very different.
Smart financial decisions require understanding how taxes actually work.
Last time, we covered the different types of income and how the IRS taxes each one.
Today, we’re clearing up a common point of confusion: tax deductions and tax credits.
Tax Deductions
A tax deduction reduces your taxable income — not your tax bill.
Let’s say you earn $70,000 from your job.
This is your gross income.
But the IRS does not calculate your tax using that full amount.
First, your income is reduced by certain deductions, such as:
Pre-tax health insurance premiums
FSA or HSA contributions (accounts used to pay for healthcare expenses)
Traditional 401(k) or IRA contributions
Student loan interest
The standard deduction
After subtracting those amounts, what remains is called your taxable income.
That’s the number the IRS uses to determine how much tax you actually owe.
Let’s say you earned $70,000 in 2025, contributed $5,000 to a Traditional IRA, and you’re single with one child and taking the standard deduction ($16,100 for single filers for 2026).
Gross income: $70,000
Total Deductions: $5,000 + $16,100 = $21,100
Taxable Income: $70,000 - $21,100 = $48,900
Even though you earned $70,000, you’re only taxed on $48,900.
That means $21,100 of your income is shielded from tax through deductions.
Takeaway: Deductions reduce the amount of income that gets taxed.
Tax Credits
A tax credit reduces your tax bill directly.
Not your income.
Not your taxable income.
Your actual tax owed.
Using the example above, the child in the household qualifies for the Child Tax Credit, which is worth $2,000.
Using the 2026 tax brackets from our previous post, we can calculate the federal income tax owed on $48,900 of taxable income:
10% x $12,400 = $1,240
12% x $36,500 = $4,380
Total federal income tax (before applying credits): $1,240 + $4,380 = $5,620
Now we apply the credit:
Child Tax Credit: - $2,000
Final tax owed: $3,620
Takeaway: Credits reduce your tax bill dollar for dollar.
In our example, a $2,000 tax credit saves the taxpayer $2,000.
But a $2,000 tax deduction would only save them $2,000 x 12% = $240
One final observation.
The final tax bill of $3,620 is just 5.17% of $70,000.
Many people overestimate how much they pay in federal income taxes.
They focus on their top tax bracket (in this case 12%) — not their effective tax rate.
But in most cases, they are very different numbers.