from my accountant:
Thanks for the email. If all other income stays relatively the same, your income for 2025 will be higher than 2024. To avoid a penalty for underpayment of federal taxes, you must pay 110% of prior year tax. Your tax amount for 2024 was $XXXX. The target amount would be $XXXXX
In order to avoid a penalty completely, all your tax payments must be paid through payroll withholdings. If you make estimated tax payments, you calculate the quarterly tax owed each quarter and compare how much you pay each quarter to know if you are underpaid for any quarter during the year. So, if you make an estimated tax payment for the fourth quarter, then you might have some quarters that are underpaid and would be subject to a penalty. If you add the payment amount into your payroll withholdings, then you would not have the penalty because regardless of when payroll withholdings are paid, they are treated for penalty purposes as payment evenly throughout the year (1/12).
For GA purposes, to avoid a penalty, you must pay 100% of prior year tax or 70% of current year tax. Penalties are calculated the same way as federal.
So, yes, you can pay an estimate for the fourth quarter if you want to do so. The estimated payment due date is January 15, 2026. An easier thing to do might be to look at your current pay stub and see how much federal withholding you have in your bucket and see how short you are to the $XXXX target and withhold the difference in one of your December payroll checks. If that option is not feasible, then you can pay the difference using an estimated tax payment voucher knowing you might have a small penalty assessed on the 2025 tax return. For GA, your 2024 tax amount was $XXXX. You can do the same exercise for GA as you did for federal.
Tax strategies.
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Yes, we recommend harvesting all the losses you have in your investment account. Since your gain is short-term, the gains will be taxed as ordinary income subject to your marginal tax bracket rate. Long-term gains gets favorable capital gains tax rates.If you are charitable minded, you might want to increase your charitable giving and exercise a bunching process, where you give lots of contributions in one year or in a year when your income is higher to offset the higher taxes.Do you have ability to defer income to a retirement account and if yes, are you maxing out the contribution?[/ol]