JH Group CPA Tax Planning

Year-End Tax Planning

Year-end tax planning reviews income, deductions, withholding, estimated taxes, retirement contributions, investments, business profit, payroll, real estate activity, and major transactions before December 31. JH Group CPA helps high-income taxpayers and business owners model federal and California tax exposure while there is still time to act.

Best fit High-income individuals, business owners, S-corp shareholders, real estate investors, executives, and families with large tax payments.
Planning focus Tax projections, withholding, estimated tax, retirement plans, payroll, capital gains, charitable giving, and California tax.
Timing Review in Q3 or Q4, before December 31, and before bonuses, sales, distributions, equipment purchases, or real estate closings.

Direct Answer

Year-end tax planning is the process of estimating current-year tax before the year closes and deciding whether practical actions should be taken before December 31. It can include income timing, deduction timing, retirement contributions, payroll, withholding, estimated payments, capital gains, charitable gifts, business purchases, and California tax planning.

Who This Is For

  • High-income W-2 earners with bonuses, stock compensation, or underwithholding risk
  • Business owners and S corporation shareholders with changing profit or payroll needs
  • Real estate investors with rental income, repairs, depreciation, refinancing, or planned sales
  • Taxpayers with capital gains, concentrated stock, equity compensation, or investment income
  • Families with large federal or California estimated tax payments

Key Year-End Tax Planning Strategies

Prepare a tax projection
Estimate federal and California tax using current income, deductions, withholding, estimated payments, business profit, rental activity, and investment gains.
Review withholding and estimates
Identify underpayment risk and coordinate payroll withholding or estimated payments before year-end deadlines.
Evaluate retirement contributions
Review 401(k), profit-sharing, cash balance, SEP, or other retirement strategies based on compensation, plan rules, and business cash flow.
Coordinate capital gains and losses
Review investment gains, losses, net investment income tax, stock compensation, and charitable giving before selling or gifting assets.
Review business deductions
Plan equipment purchases, payroll, bonuses, owner compensation, accountable plans, and entity-level decisions before books close.
Model California tax
Review California income, estimated tax timing, pass-through income, real estate gains, and state-specific payment requirements.

What Should Be Reviewed Before December 31?

A year-end review should usually include pay stubs, business profit and loss reports, estimated tax payments, rental summaries, brokerage gain/loss reports, planned bonuses, retirement contributions, charitable giving, equipment purchases, entity distributions, and major transactions expected before or shortly after year-end.

Common Mistakes

  • Waiting until March or April, after many payroll, retirement, and transaction-timing options are already closed.
  • Underpaying estimated taxes after a bonus, business profit increase, stock sale, or real estate transaction.
  • Selling investments without reviewing capital gains, capital losses, and net investment income tax.
  • Forgetting California estimated tax rules and state cash-flow impact.
  • Making year-end purchases without confirming whether the deduction timing, cash flow, and documentation actually support the plan.

Simple Example

A business owner has higher-than-expected profit in November and also plans to sell investments. A year-end review can estimate tax, adjust payroll or estimated payments, evaluate retirement contributions, review capital gains and losses, coordinate charitable gifts, and decide whether any income or deduction timing is practical before December 31.

FAQ

When should year-end tax planning start?

Ideally in the third or fourth quarter. Start earlier if a sale, bonus, business transaction, real estate closing, stock event, retirement plan change, or large income shift is expected.

What does a tax projection include?

A tax projection usually reviews income, deductions, credits, withholding, estimated payments, business profit, rental income, investment activity, capital gains, retirement contributions, and expected year-end transactions.

Can year-end tax planning reduce penalties?

It can help identify underpayment risk and allow taxpayers to adjust withholding or estimated tax payments before deadlines. Penalty results depend on the facts, payment timing, prior-year tax, and current-year tax.

Do California estimated tax rules differ from federal rules?

Yes. California has its own estimated tax rules, payment percentages, and high-income estimated tax requirements. California cash flow should be modeled separately from the federal projection.

What should I send my CPA for year-end planning?

Send prior-year returns, current pay stubs, profit and loss reports, rental summaries, brokerage gain/loss reports, estimated tax records, retirement contribution details, and notes about planned transactions.

Related Tax Planning Topics

High-Income Business Owner Tax Planning | S-Corp Tax Planning | Rental Property Tax Strategy | Real Estate Investor Tax Planning

Authoritative Sources

Schedule a Year-End Tax Planning Consultation

Year-end tax planning works best before December 31 and before major transactions close. Contact JH Group CPA to review projections, withholding, estimated taxes, retirement contributions, investment gains, business profit, and California tax impact.

Phone: (626) 943-2888
Email: info@jhgroupcpa.com
Offices: Alhambra and Irvine, California

Reviewed by Jeff Huang, CPA, MBA

Jeff Huang leads JH Group CPA, A Professional Corporation, a California CPA firm serving high-income individuals, business owners, real estate investors, physicians, dentists, and families with complex tax needs from offices in Alhambra and Irvine.

Last updated: May 20, 2026

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