Understand salary, bonuses, equity compensation, benefits, and the financial decisions that come with earning more.
Shares vesting does not automatically make holding them the right call. This CPA-led framework separates the compensation-tax layer from the investment decision that starts the moment you own the shares — including how RSU withholding can differ from final tax liability and the cost-basis error that can cause tax to be paid twice.
Federal withholding and estimated payments are treated differently when the underpayment penalty is calculated. That difference can determine what a W-2 household can still fix before year-end.
Find out whether your federal withholding is on track for safe harbor — and estimate what additional withholding may still be needed before year-end.
Internal note / excerpt Special compounding treatment relevant to the Section 6654 addition.
Required annual payment; 90/100/110 rules; AGI thresholds; federal underpayment framework.
Current individual underpayment rates by quarter. For 2026: Q1 7%, Q2 6%, Q3 7%, Q4 7%.
Employee withholding adjustment mechanism, including additional withholding.
It Depends
Read the AnalysisGenerally yes, for the compensation layer. When RSUs settle and shares or cash are delivered, the value is generally included in your wages and reported on Form W-2, with income tax withholding and employment taxes applied. Exact timing depends on plan terms, especially for private-company awards with a liquidity condition.
No. The compensation value is taxed once as wages; any later change in the share price is taxed once as a capital gain or loss. Selling immediately at the vest price usually produces a gain or loss near zero. The “taxed twice” impression comes from a Form 1099-B reporting a cost basis of zero, which you correct on Form 8949 rather than accept.
Generally, no. Employer matching and profit-sharing contributions do not reduce the regular employee elective-deferral limit, but they generally count toward the broader $72,000 annual-additions limit.
Generally the fair market value already included in your income as compensation — usually the vest-date value used by payroll, per share. Your broker may not report this, because the reporting rules prevent brokers from increasing initial basis for income recognized on equity compensation granted or acquired after 2013. Keep your vest confirmations.
Sometimes. It is a legitimate default for people already heavily concentrated, but it is a portfolio judgment rather than a tax rule. Selling at vest does have one clean property: because the shares were just taxed at the vest value, an immediate sale usually produces little additional gain to manage.
A transaction in which the plan’s broker sells enough of your newly delivered shares to fund required withholding, remitting the proceeds to the employer. It differs from net share settlement, where the company retains shares and no market sale occurs. Sell-to-cover produces a reportable sale; share withholding does not.
