Tax Basics: Deductions, Credits, and What They Mean
How deductions and credits actually lower your bill, with simple examples.
A deduction reduces taxable income
A deduction lowers the amount of income that is subject to tax. A $1,000 deduction at a 22% marginal rate saves you roughly $220 in tax. Deductions are valuable, but their value depends on your tax bracket.
A credit reduces tax directly
A credit reduces your tax bill dollar-for-dollar. A $1,000 credit saves you the full $1,000 in tax, regardless of bracket. Some credits are even refundable, meaning you receive the difference if the credit exceeds what you owe.
Standard vs itemised deductions
Most filers take the standard deduction — a flat amount the government allows everyone. You itemise only if your specific deductible expenses (mortgage interest, large charitable gifts, state and local taxes up to the cap) add up to more than the standard amount.
Common credits worth knowing
Earned Income Tax Credit (for lower-income workers), Child Tax Credit, education credits, and clean-energy credits are among the most commonly relevant. Eligibility rules change — check the current IRS guidance each year.
Where most people overpay
Forgetting eligible credits, missing retirement contribution deadlines that reduce taxable income, and overlooking deductible self-employment expenses are the most common ways people overpay. A good tax software walkthrough catches most of these.
Frequently asked questions
Is a refund a good thing?
A refund means you overpaid throughout the year. It is your money, returned with no interest. Adjusting your withholding can put that money in your paycheque instead.
Do I need an accountant?
For a straightforward W-2 with a standard deduction, tax software is usually enough. For self-employment, rental income, or major life changes, an accountant is often worth the fee.
How long should I keep records?
Most personal tax records: at least three years. Some situations (real estate, unfiled returns) require seven or more.