Tax planning isn’t an April conversation. This checklist covers the decisions that need to happen throughout the year to minimize unnecessary tax drag.
Why Most High Earners Overpay on Taxes
The tax code isn’t designed to automatically minimize your liability. It’s designed to collect what you owe based on the decisions you make — or don’t make — throughout the year. For most high earners, the gap between what they pay and what they could pay with proactive planning is real, measurable, and entirely avoidable.
The problem isn’t complexity. It’s timing. Most tax decisions that could have reduced the bill are only identified in March or April, after the year has closed and the window to act has passed. A year-round approach changes that — by building the planning into the calendar instead of reacting to it after the fact.
Q1: January — March
Review Last Year’s Return With a Planning Lens
The tax return isn’t just a compliance document. It’s a map of where the opportunities were and where they still are.
- Identify income categories that drove the highest tax cost
- Note any carryforward losses that can be deployed this year
- Review withholding and estimated payment accuracy — did you owe a large balance or receive a large refund?
- Flag any one-time events from last year that won’t repeat and adjust planning accordingly
Set Estimated Payment Schedule
If your income includes variable compensation, business distributions, RSUs, or other non-W2 sources, estimated payments are likely required.
- Calculate Q1 estimated payment based on projected income
- Adjust withholding on W2 income if a gap was identified in last year’s return
- Coordinate with your CPA on safe harbor calculations to avoid underpayment penalties
Review Retirement Contribution Limits
Contribution limits reset at the start of each year.
- Confirm 401k contribution rate is set to maximize the annual limit
- Evaluate whether a backdoor Roth IRA contribution makes sense for the year
- For business owners, determine whether the retirement plan structure still makes sense at current revenue
Q2: April — June
Coordinate Around RSU Vesting Events
Spring is a common vesting period for many tech compensation schedules.
- Review upcoming vesting dates and the projected income impact
- Confirm withholding rate is adequate — the default 22% federal rate is likely insufficient at higher income levels
- Identify whether any deductions or losses can be accelerated into the same tax year to offset vest income
- Evaluate concentration level post-vest and whether a diversification plan is needed
Review Q1 Actuals Against Projections
- Compare actual income through Q1 against the year’s projection
- Adjust Q2 estimated payment if income is tracking higher or lower than expected
- Flag any one-time income events expected in Q2 — bonuses, distributions, asset sales
Business Owner Checklist
- Review compensation structure — is the salary/distribution split still appropriate at current revenue?
- Confirm retirement plan contributions are on track
- Evaluate whether any equipment purchases or business expenses should be accelerated or deferred
Q3: July — September
Mid-Year Tax Projection
This is the most important planning checkpoint of the year. With six months of actual income data, a mid-year projection gives you time to act on what you find.
- Run a projection of full-year taxable income based on actuals through June
- Identify the expected tax liability and compare to payments made so far
- Determine whether additional estimated payments are needed in Q3
- Flag any decisions that need to happen before December 31
Tax-Loss Harvesting Review
- Review taxable investment accounts for positions with unrealized losses
- Evaluate whether harvesting losses makes sense given the current portfolio and wash sale rules
- Identify positions with large unrealized gains that may need to be managed before year-end
Charitable Giving Planning
If charitable giving is part of the financial picture, Q3 is the time to plan it — not December.
- Evaluate whether a donor-advised fund contribution makes sense this year
- Consider appreciated stock donations instead of cash to maximize the tax benefit
- Determine the giving amount that makes sense relative to the projected income and deduction picture
Q4: October — December
Year-End Tax Planning Window
The last quarter is the highest-leverage planning period of the year. The income picture is clear, and there’s still time to act.
Income Timing Decisions
- Can any income be deferred into next year — bonuses, business distributions, asset sales?
- Should any income be accelerated into this year if next year’s rate is expected to be higher?
- Are there Roth conversion opportunities given this year’s income level?
Deduction Acceleration
- Can any deductible expenses be paid before December 31 — state taxes, business expenses, charitable contributions?
- Is there a case for bunching deductions into this year if itemizing makes sense?
RSU and Equity Decisions
- Review remaining vesting events for the year and confirm tax coverage
- Evaluate whether selling any positions before year-end makes sense from a tax standpoint
- Confirm the wash sale calendar if losses have been harvested earlier in the year
Retirement Contributions
- Confirm all retirement accounts are on track to hit annual limits before December 31
- For business owners, confirm that any profit-sharing or defined benefit contributions are funded on schedule
- Evaluate whether a mega backdoor Roth contribution is available and makes sense
Review Beneficiary Designations and Account Titling
Year-end is a natural time to confirm that the non-tax components of the financial plan are current.
- Verify beneficiary designations on retirement accounts and life insurance
- Confirm account titling matches the estate plan structure
- Note any life changes — marriage, divorce, new child, business event — that require updates
Ongoing: Throughout the Year
Coordinate Your Advisors
The single most common source of missed tax planning is advisors who don’t talk to each other. The investment account, the tax return, and the financial plan need to be coordinated — not managed independently.
- Ensure your financial advisor and CPA are communicating before major decisions are made
- Share the investment account activity with the CPA before year-end so nothing is a surprise at filing
- Loop in the estate attorney when major asset or life changes occur
Keep a Tax Event Log
Major financial events have tax consequences. Tracking them as they happen makes year-end planning significantly more accurate.
- RSU vesting events and sale dates
- ESPP purchase and sale dates
- Significant investment account transactions
- Business income and distribution events
- Real estate transactions or rental income changes
- Major deductible expenses
The Bottom Line
Tax planning is not a filing exercise. It’s a year-round discipline that compounds over time — in lower bills, better decisions, and a financial strategy that keeps more of what you earn working toward your goals.
The checklist above isn’t exhaustive. Every situation is different, and the highest-leverage moves depend on the specific income, assets, and goals in front of you. But the framework is consistent: plan early, project often, act before the window closes, and make sure everyone involved in your financial life is working from the same picture.
