Year-end tax tips can help you identify tax items that deserve attention before December 31. Although your tax return is generally prepared after the year ends, some decisions and transactions must occur during the tax year to affect that year’s return.
Therefore, the final months of the year are a useful time to review income, federal withholding, estimated payments, retirement contributions, charitable giving and business records. In addition, significant changes involving your family, employment or investments can affect your tax situation.
The goal is not to spend money simply to obtain a tax deduction. Instead, use a year-end review to understand where you stand and whether an appropriate action still needs to be completed before an applicable deadline.
BEFORE DECEMBER 31
Focus on Decisions That Still Have a Deadline
Some tax items can be handled after December 31. For example, qualifying IRA contributions for a tax year can generally be made by the individual return due date, not including extensions.
Other opportunities, however, depend on action during the calendar year. Employee elective deferrals to a 401(k), charitable contributions intended for the current year and certain business transactions are examples where timing can matter.
As a result, a useful year-end review separates items that require action now from those that can wait until tax preparation begins.
Most importantly, verify the deadline for the specific transaction. Different tax benefits follow different rules.
YEAR-END PRIORITY
Review. Verify. Act before the deadline.
December 31 is important, but not every tax deadline falls on that date.
Check the rule that applies before making a tax-driven decision.
TIP 01
Check Your Federal Tax Withholding
Federal income tax generally follows a pay-as-you-go system. Therefore, employees should review how much federal income tax has been withheld during the year.
A year-end check can be especially useful after major income or family changes.
Compare Your Paycheck With Your Current Situation
Review your most recent paystub and year-to-date federal income tax withholding. Next, consider whether your household income changed because of a new job, second job, raise, marriage, divorce or another significant event.
In addition, account for taxable income that may not have regular withholding. Interest, dividends, capital gains and self-employment income can affect your overall tax situation.
If an adjustment is appropriate, employees can generally submit a new Form W-4 to their employer. However, adjustments made very late in the year have fewer remaining pay periods in which to take effect.
TIP 02
Review Estimated Tax Payments
If withholding does not cover enough of your expected tax, estimated payments may also deserve attention. This issue commonly affects self-employed taxpayers, although investment and other income can create the same concern.
Look at the Entire Year
First, estimate your full-year income. Then, compare expected tax with federal withholding and estimated payments already made.
Because income can fluctuate, using only the previous quarter’s numbers may not provide an accurate picture.
For example, a strong fourth quarter in a business can significantly change annual profit. Likewise, an investment sale late in the year can affect taxable income.
Don’t Assume April Is the Only Payment Deadline
Federal estimated tax generally has multiple payment periods during the year. Consequently, taxpayers who need estimated payments should review the applicable schedule instead of waiting until the annual return is due.
In addition, underpayment rules can apply when insufficient tax is paid during the year.
TIP 03
Review Workplace Retirement Contributions
Retirement contributions can be an important part of year-end planning. However, the tax treatment and contribution deadline depend on the type of account.
For 2026, the general employee elective deferral limit for 401(k), 403(b) and certain governmental 457 plans is $24,500. In addition, many eligible participants age 50 or older can make catch-up contributions, subject to the plan and applicable rules.
Traditional pre-tax elective deferrals can generally reduce current federal taxable income for income tax purposes. Roth contributions work differently because they generally do not provide that current federal income tax reduction.
Therefore, review your year-to-date contributions and the terms of your employer’s plan before making changes.
Also, remember that increasing a contribution can reduce take-home pay. A tax benefit should be considered together with your budget and long-term financial goals.
2026 RETIREMENT LIMIT
$24,500
General employee elective deferral limit
Applies to 401(k), 403(b) and certain governmental 457 plans, subject to applicable rules and plan terms.
TIP 04
Don’t Confuse the IRA Deadline With December 31
Not every retirement contribution must be completed before the calendar year closes.
For that reason, understand the difference between an IRA and an employee workplace deferral.
2026 IRA Contribution Limit
For 2026, the combined regular contribution limit for Traditional and Roth IRAs is generally $7,500. Eligible individuals age 50 or older can generally contribute an additional $1,100.
Regular IRA contributions for a tax year can generally be made by the due date of the individual federal return, not including extensions. Consequently, December 31 is not generally the contribution deadline for a regular IRA.
Nevertheless, planning before year-end can still be useful. Traditional IRA deductibility can depend on income, filing status and workplace plan coverage, while Roth IRA eligibility also has income limitations.
TIP 05
Plan Charitable Contributions Carefully
Charitable giving can provide a federal tax benefit when the applicable requirements are satisfied. Beginning with tax year 2026, an important rule also applies to some taxpayers who do not itemize deductions.
A New 2026 Deduction for Some Non-Itemizers
Beginning with tax year 2026, taxpayers who do not itemize may be able to deduct up to $1,000 of qualifying cash contributions to certain qualified organizations.
For married taxpayers filing jointly, the limit can be up to $2,000, subject to the applicable requirements.
Therefore, taxpayers should not automatically assume that charitable contributions have no federal deduction simply because they use the standard deduction.
Documentation Still Matters
Only contributions that satisfy the applicable requirements qualify. For example, gifts to individuals are not deductible charitable contributions.
In addition, taxpayers should maintain records supporting their donations. The required documentation can depend on the amount and type of contribution.
Before donating primarily for tax reasons, verify that the organization qualifies and understand the applicable substantiation requirements.
TIP 06
Review Investment Gains and Losses
Investment transactions can affect your federal income tax even when the proceeds remain in a brokerage account.
Therefore, review realized transactions before the year closes.
Look at Realized Results
Selling an investment can create a capital gain or loss. The tax result generally depends on factors such as adjusted basis, sale proceeds and holding period.
Consequently, do not judge the tax effect only by looking at how much cash entered the account.
Be Careful With Tax-Loss Harvesting
Some investors consider realizing losses to offset capital gains. However, wash-sale rules can affect the ability to deduct a loss when substantially identical securities are acquired within the applicable period.
As a result, investment decisions should consider both tax consequences and the underlying investment strategy. Avoid selling or buying an investment solely because of a potential tax result without understanding the broader financial impact.
TIP 07
Business Owners: Close the Books Before Making Tax Decisions
For business owners, one of the most useful year-end steps is updating the accounting records. Without current numbers, it becomes difficult to estimate business profit or evaluate potential deductions.
First, reconcile bank and credit card accounts. Next, review income and expense categories for missing, duplicated or incorrectly classified transactions.
In addition, separate personal transactions from legitimate business activity. Paying a personal expense through a business account does not automatically make it deductible.
Once the books are current, review major equipment purchases, business expenses and other transactions that may affect the return. However, do not assume every purchase will be immediately deductible because capitalization and depreciation rules can apply.
Consistent bookkeeping can make both year-end planning and tax preparation more efficient.
BUSINESS YEAR-END CHECK
Before You Estimate Taxes
✓ Reconcile bank accounts
✓ Review revenue
✓ Categorize expenses
✓ Separate personal transactions
✓ Review fixed assets
✓ Verify estimated payments
✓ Review payroll records
Accurate books create a better starting point for tax decisions.
TIP 08
Review Payroll and Contractor Information
Businesses should not wait until January filing deadlines approach to discover missing employee or contractor information.
Instead, review those records before the year closes.
Verify Employee Records
Review employee names, addresses, taxpayer identification information and payroll records. In addition, investigate payroll discrepancies before year-end forms are prepared.
Accurate payroll records support Forms W-2 and the employer’s payroll tax reporting responsibilities.
Review Vendor and Contractor Records
Likewise, examine payments to independent contractors and other vendors for potential information-reporting requirements. When applicable, having a properly completed Form W-9 on file can make preparation of information returns easier.
ASB Tax & Accounting also provides payroll services for businesses that need ongoing payroll support.
TIP 09
Account for Major Life Changes
A year-end tax review should reflect what actually happened during the year. Therefore, compare your current circumstances with the information reported on your previous tax return.
Family Changes
Marriage, divorce, birth, adoption and changes involving dependents can affect different parts of a tax return.
For example, filing status, dependent-related credits and withholding may deserve another review after a significant family change.
Consequently, do not assume that last year’s filing setup still matches your current circumstances.
Financial Changes
A new business, home sale, retirement, rental property, large investment transaction or additional source of income can also change the tax picture.
Likewise, beginning freelance or gig work can create income that does not have regular withholding.
Therefore, include these changes when reviewing withholding and estimated tax payments.
TIP 10
Don’t Miss Tax Benefits That Changed
Tax rules can change between filing seasons. For that reason, year-end planning should use current law rather than an old tax checklist.
Several federal deductions are especially relevant under current rules.
Review New or Enhanced Individual Deductions
Current federal law includes deductions involving qualified tips, qualified overtime compensation and certain qualifying passenger vehicle loan interest. In addition, eligible taxpayers age 65 or older may qualify for an enhanced senior deduction.
However, each provision has its own eligibility requirements, income limitations and documentation rules. Consequently, the existence of a new deduction does not mean every taxpayer can claim it.
Keep records that may support a benefit that applies to your situation. Then, evaluate eligibility when preparing the return.
TIP 11
Create a Tax File Before January
Not every year-end task involves changing a financial transaction. Organization can also make the next filing season easier.
Start a folder for tax-related documents and records. For example, keep estimated tax payment confirmations, charitable contribution records, property documents and business information together.
In addition, make a list of income forms you expect after the year closes. Employees may expect Forms W-2, while banks, brokers and other payers may issue different Forms 1099 depending on the activity.
Business owners should also maintain updated bookkeeping reports rather than waiting for tax documents to reconstruct the year’s activity.
As a result, January becomes a process of completing the file instead of starting from zero.
BE READY FOR JANUARY
Save These Records
✓ Estimated tax payments
✓ Charitable donations
✓ Investment transactions
✓ Property records
✓ Business expenses
✓ Retirement contributions
✓ Major life changes
Good tax preparation starts before the first tax form arrives.
FINAL REVIEW
Prioritize What Actually Requires Action
A long tax checklist can make year-end planning seem more complicated than necessary.
Instead, identify the items that apply to your circumstances and focus on those first.
Ask Four Questions
1. Did my income change?
If so, review withholding or estimated payments.
2. Did my family or financial situation change?
If so, consider how the change may affect filing status, dependents, credits or income.
3. Is there an action with a year-end deadline?
If so, verify the exact deadline before acting.
4. Are my records current?
If not, organize them now so tax preparation starts with reliable information.
Ultimately, useful year-end planning focuses on your actual circumstances rather than trying to use every possible tax strategy.
COMMON QUESTIONS
FAQ About Year-End Tax Tips
These answers cover common questions about reviewing taxes before the calendar year closes.
Start with full-year income, federal withholding and estimated tax payments. Next, review retirement contributions, charitable giving, investment transactions and significant family or financial changes. Business owners should also update bookkeeping and review payroll records.
No. Different deductions and contributions follow different deadlines. For example, regular IRA contributions for a tax year can generally be made by the federal individual return due date, not including extensions. Therefore, verify the rule for the specific tax benefit instead of assuming December 31 applies to everything.
Not solely for that reason. A deduction generally reduces taxable income rather than reimbursing the full cost of an expense. Consequently, determine whether the expenditure makes financial or business sense first and then evaluate its tax treatment.
Beginning with tax year 2026, eligible taxpayers who do not itemize may be able to deduct up to $1,000 of qualifying cash contributions to certain qualified organizations, or up to $2,000 for married taxpayers filing jointly. However, specific requirements apply, so documentation and the type of contribution matter.
Yes, especially after significant changes in income, employment or family circumstances. However, reviewing withholding earlier in the year provides more time to make adjustments. The IRS Tax Withholding Estimator can help many employees and retirees evaluate federal withholding.
Business owners should update bookkeeping, reconcile financial accounts, review revenue and expenses, verify estimated payments and examine payroll and contractor records. In addition, major equipment purchases or other significant transactions may deserve tax review before the year closes.
Review Your Tax Situation Before the Year Closes
These year-end tax tips can help you identify income, payments, records and financial changes that deserve attention before filing season begins.
ASB Tax & Accounting helps individuals and business owners prepare federal and California income tax returns and organize the information needed for tax filing.
Learn more about our tax and accounting services, or contact our Oxnard office to schedule an appointment. Assistance is available in English and Spanish.
Last reviewed: October 2026. Federal and California tax rules, contribution limits, deductions and deadlines can change. In addition, the appropriate year-end action depends on your income, filing status and individual circumstances. Therefore, verify the rules that apply before making a financial decision primarily for tax purposes. This article provides general tax information and does not replace individualized tax or financial advice.
