How to Reduce Your Taxes: Deductions, Credits and the Right Order

The short answer: shrink the income that is taxed, then claim every credit#

There are really only two ways to legally pay less tax, and the winners use both in order. First, shrink your taxable income — the number the tax is calculated on — by putting money into pre-tax accounts and claiming the deductions you qualify for. Then, subtract tax credits, which cut the tax itself dollar-for-dollar. Do the first, then the second, and you keep money that most people hand over without a second thought.

The reason so many overpay is simply inertia. They never max the pre-tax retirement accounts that would lower their income, they take the automatic standard deduction without checking whether itemizing wins, and they miss credits worth real money because nobody told them the credit existed. None of this is aggressive or shady; it is claiming what the tax code openly offers.

The rest of this guide is the order to work in: cut taxable income first, then chase the credits, then invest and time things so the bill stays low year after year.

• Cut taxable income first — pre-tax retirement/HSA contributions and deductions.
• Then stack credits — they beat deductions, dollar for dollar.
• Standard vs itemized — take whichever is bigger, never both.
• Keep the receipts — you cannot claim what you cannot document.

Deductions vs credits: the difference is worth thousands#

Get this one distinction right and everything else falls into place. A tax deduction lowers the income you are taxed on, so a $1,000 deduction saves you your marginal rate on that grand — around $220 in the 22% bracket. A tax credit cuts the tax you owe directly, so a $1,000 credit saves you the full $1,000, whatever your bracket.

That makes credits far more valuable than deductions of the same size, and it explains why a smart strategy chases credits hard while treating deductions as the baseline. The neutral overview at Wikipedia's entry on tax deductions lays out the mechanics if you want the long version.

So the mental model is: deductions shrink the pie the tax is a slice of; credits are money knocked straight off the final bill. Prioritise accordingly.

Lever 1: max your pre-tax accounts — the biggest deduction most people have#

For the majority of employees, the single largest and easiest deduction is not something exotic — it is the money you route into a pre-tax 401(k), a traditional IRA, or a health savings account (HSA). Every dollar you contribute comes straight off your taxable income, so a worker in the 24% bracket who puts $10,000 into a 401(k) cuts their tax bill by roughly $2,400 while funding their own future.

This is why the best retirement accounts do double duty: they build wealth and lower today's tax at the same time. The HSA is the standout, because it is deductible going in, grows tax-free, and comes out tax-free for medical costs — the only account taxed favourably three ways.

If you do nothing else on this list, max the pre-tax accounts you have access to first. No deduction you hunt for at tax time will beat the one you set up automatically from every paycheque.

Lever 2: standard deduction vs itemizing#

Every filer gets to subtract either the standard deduction — for the 2025 tax year $15,750 for a single filer and $31,500 for a married couple filing jointly, after the latest increase — or the total of their itemized deductions, whichever is larger. You never get both, so the whole decision is a single comparison.

Itemising only wins if your deductible expenses add up to more than the standard amount. The big ones are mortgage interest, state and local taxes (SALT) — now capped at a far higher $40,000 for 2025 — and charitable donations. Because the standard deduction is so large, the large majority of people simply take it, but if you own a home with a sizeable mortgage, pay high state taxes, or give generously, run the numbers both ways before you file.

The 2025 tax law also added new write-offs that even standard-deduction takers can use: deductions for qualified tips and overtime pay, for car-loan interest on a qualifying vehicle, and an extra $6,000 deduction for filers aged 65 and older. They are temporary — 2025 through 2028 — and income-limited, so check the current IRS rules, but they are real money that did not exist a year ago.

The rule is boringly simple: add up your itemized deductions once a year, compare to the standard, and take the bigger. Guessing wrong in either direction quietly overpays.

Lever 3: the credits worth chasing#

Because credits cut your tax directly, they are where the real money hides. The IRS's own list of credits and deductions is worth a look, because most people qualify for at least one credit and claim none. Work through the ones you might be eligible for:

• Child Tax Credit — raised to up to $2,200 per qualifying child for 2025, with up to $1,700 of it refundable.
• Earned Income Tax Credit (EITC) — a substantial credit for low-to-moderate earners that many eligible people never claim.
• Saver's Credit — a credit just for contributing to a retirement account on a modest income, so your deduction earns a credit too.
• Education credits for tuition, and energy / clean-vehicle credits for qualifying home upgrades and cars.

Invest tax-efficiently (and harvest your losses)#

Where you hold investments changes what you pay. Keep tax-inefficient holdings inside tax-advantaged accounts, let long-term gains — taxed at lower rates than income — do the heavy lifting, and favour low-turnover index funds that generate fewer taxable events than active trading.

In a regular brokerage account there is also tax-loss harvesting: selling a losing position to realise the loss, which offsets your capital gains (and a limited amount of ordinary income), then reinvesting in something similar to stay in the market. Done carefully around the wash-sale rule, it turns a down year into a smaller tax bill.

None of this requires day-trading or clever tricks. It is mostly about *which account* holds *which asset*, and letting time and low costs keep the taxable events few.

Time it right: the moves before the deadline#

Tax is annual, so timing is a lever of its own. Make sure your retirement and HSA contributions land before the cut-off, since a contribution a day late counts for next year. If you are close to the itemising threshold, bunch two years of charitable giving into one to clear the standard deduction in alternating years.

Higher earners have extra moves: a backdoor Roth when income tops the normal limit, donating appreciated stock instead of cash to skip the capital-gains tax, and, where it fits, deferring a bonus or accelerating a deductible expense across the year-end line. The point is not to be clever for its own sake, but to make sure a legitimate deduction or contribution lands in the year it helps most.

For Canadians: RRSP, FHSA and the credits#

North of the border the tools differ but the logic is identical. RRSP contributions are deducted straight from your taxable income, exactly like a US traditional account, so they are the go-to way to lower this year's tax. The newer FHSA (First Home Savings Account) is the best of both worlds for future buyers — deductible going in and tax-free coming out for a first home. A TFSA is not deductible, but everything inside grows and is withdrawn tax-free.

On top of the deductions, Canada leans heavily on credits: the basic personal amount, plus credits for donations, tuition and more, all of which reduce tax directly rather than merely reducing income. The Canada Revenue Agency's guidance on deductions and credits lays out what applies to you.

The playbook is the same everywhere: use the deductible accounts to shrink taxable income, then claim every credit you are entitled to.

Do not over-optimise: what a big refund really is#

One last mindset shift. A giant tax refund feels like a windfall, but it is not free money — it is the government handing back the interest-free loan you gave it by over-withholding all year. If you get a large refund every spring, adjust your withholding so you keep more in each paycheque and put it to work sooner.

That said, do not swing to the other extreme and skip legitimate deductions or credits to avoid a refund; claim everything you are owed. And when a real refund does land, give it a job rather than letting it evaporate: top up a high-yield savings account, fund an emergency buffer, or slot it into your 50/30/20 budget goals.

Mistakes that quietly cost you at tax time#

None of these are exotic. They are the ordinary oversights that leave money with the tax authority, and each one is fixable before you file.

• Not maxing pre-tax accounts — the biggest, easiest deduction, skipped.
• Taking the standard deduction (or itemising) without checking which is actually bigger.
• Chasing a deduction when a credit exists for the same thing — credits win.
• Missing the Saver's Credit or EITC because no one flagged that you qualify.
• Keeping no receipts or records, so you cannot back up what you claim.
• Aiming for a huge refund instead of adjusting withholding and investing the difference.

The order in action: a worked example#

Put the steps together and the payoff is obvious. Say you are single and earn $70,000. First you shrink the income you are taxed on: $10,000 into a pre-tax 401(k) and $4,300 into an HSA pull your taxable income down to about $55,700 before you have claimed a single deduction. In the 22% bracket, that first move alone is over $3,100 of tax gone — money that is now invested for your future instead of withheld.

Then you subtract the $15,750 standard deduction, dropping taxable income to roughly $40,000, and finally you take the credits you qualify for. A $2,200 Child Tax Credit comes straight off the tax itself, not the income, and a modest earner who funded those accounts may also land the Saver's Credit on top. Same salary and same job as the colleague at the next desk, but a materially smaller bill — purely from doing the three steps in the right order and claiming what was already on offer.

Notice the distinction that does the heavy lifting: the 401(k) and HSA money are deductions that shrink the income you are taxed on, while the Child Tax Credit is a credit knocked straight off the bill. Nothing here is aggressive or borderline; it is the tax code working exactly as intended for someone who bothered to claim it.

The bottom line#

It all comes down to a simple sequence. Shrink the income you are taxed on first, with pre-tax retirement and HSA contributions and the larger of the standard or itemized deduction. Then stack every credit you qualify for, because a credit beats a deduction of the same size every single time. Invest tax-efficiently so few taxable events pile up, time your contributions before the deadline, and keep the receipts that back up what you claim.

And treat a big refund as the interest-free loan it really is, not a prize — adjust your withholding, keep more in each paycheque, and give any refund a job. Do that year after year and you will pay exactly what you owe, not a dollar more. That, and not any clever trick, is how ordinary people quietly keep thousands more of what they earn.