The Key Difference
Deductions reduce your taxable income. A $1,000 deduction saves you $1,000 times your marginal tax rate. In the 22% bracket, a $1,000 deduction saves $220.
Credits reduce your tax dollar-for-dollar. A $1,000 credit saves you exactly $1,000 regardless of your bracket. Credits are always more valuable than deductions of the same amount.
Types of Deductions
| Type | When it reduces income | Examples |
|---|---|---|
| Above-the-line | Before AGI is calculated (Schedule 1 Part II) | Student loan interest, HSA contributions, half of SE tax, SE health insurance |
| Below-the-line | After AGI (standard or itemized) | Standard deduction, mortgage interest, SALT, charitable contributions |
Above-the-line deductions are more valuable because they reduce AGI, which affects eligibility for credits and other deductions that phase out based on AGI.
Types of Credits
Non-Refundable Credits
Can reduce your tax to zero but never below. If your tax is $500 and your credit is $1,000, you get $500 of benefit and the remaining $500 is generally lost.
| Credit | Max Amount | Form |
|---|---|---|
| Child and Dependent Care | $2,100 (2 dependents) | Form 2441 |
| Lifetime Learning Credit | $2,000 | Form 8863 |
| Saver's Credit | $1,000 ($2,000 MFJ) | Form 8880 |
| Foreign Tax Credit | Varies | Form 1116 |
| Residential Energy Credit | 30% of costs | Form 5695 |
| Clean Vehicle Credit | Up to $7,500 | Form 8936 |
| Child Tax Credit (non-refundable portion) | $2,200 per child | Form 8812 |
Refundable Credits
Can reduce your tax below zero — the IRS pays you the difference. These are the most valuable credits.
| Credit | Max Amount | Form |
|---|---|---|
| Earned Income Credit (EIC) | Up to ~$7,830 (3+ children) | Schedule EIC |
| Additional Child Tax Credit (ACTC) | Up to $1,700 per child | Form 8812 |
| American Opportunity Credit (40%) | Up to $1,000 per student | Form 8863 |
| Premium Tax Credit | Varies by income and plan | Form 8962 |
Partially Refundable Credits
Some credits have both a non-refundable and a refundable component:
- Child Tax Credit: $2,200 per child is non-refundable. Up to $1,700 per child is refundable as the Additional Child Tax Credit (ACTC) if the non-refundable portion exceeds tax liability.
- American Opportunity Credit: 60% is non-refundable, 40% (up to $1,000) is refundable.
Credit Ordering
Credits apply in a specific order on the return. Non-refundable credits (Schedule 3 Part I) reduce Form 1040 Line 16 tax first. Then additional taxes from Schedule 2 are added. Finally, refundable credits and withholding (Schedule 3 Part II) determine the refund or amount owed.
In PaisaTax
All credit forms compute automatically when their triggering data exists. The engine handles credit ordering, phaseouts, and the non-refundable vs. refundable split. Schedule 3 aggregates all credits and flows them to Form 1040.