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Don’t Get Hit with IRS Underpayment Penalties
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Article Highlights:Pay-as-You-Earn SystemWithholding and Payment Forms IRS On-line Withholding EstimatorSituations Triggering UnderpaymentsSafe Harbor PaymentsTrue Safe HarborUnder federal law, taxpayers must pay taxes during the year as they earn or receive income, or they can find themselves falling victim to substantial underpayment penalties. Even worse, they may have spent the money, and when tax time comes are unable to pay their past taxes and spiral into financial distress. To facilitate the pay-as-you-earn concept, the government has provided several means of assisting taxpayers in meeting that requirement. These include: Payroll withholding for employees - W-4; Pension withholding for retirees – W-4P; Voluntary withholding for Unemployment and Social Security benefits - W-4V; and Estimated tax payments for self-employed individuals and those with other sources of income not covered by withholding – Form 1040-ES.Employees with primarily wage income can use the IRS online tool, the Tax Withholding Estimator, to determine if their withholding closely matches their projected tax liability or if they need to adjust their tax withholding by providing a revised Form W-4 to their employer.Employees and those with significant income from other sources, multiple jobs, rentals, side gigs, children subject to the kiddie tax, capital gains, etc., may find it appropriate to consult with this office for a more sophisticated tax projection and estimate of needed withholding and/or estimated tax payments. Individuals should also check their tax withholding and estimated payments when:Changes in tax law affect their situation.They experience a lifestyle or financial change like marriage, divorce, birth or adoption of a child, home purchase, retirement, or filed chapter 11 bankruptcy.They change jobs or have a change in wage income, such as when the taxpayer or their spouse starts or stops working or starts or stops a second job.They have taxable income not subject to withholding, such as interest, dividends, capital gains, self-employment and gig economy income, and IRA distributions.Reviewing their planned deductions or eligible tax credits, including items like medical expenses, taxes, interest expense, gifts to charity, dependent care expenses, education credit, Child Tax Credit or Earned Income Tax Credit.Nonresident alien taxpayers should determine their tax withholding using the special instructions in Notice 1392, Supplemental Form W-4 Instructions for Nonresident Aliens.Once an individual has determined they need to change their tax withholding, the individual should complete a new Form W-4 to give to their employer. Individuals with other types of income should provide the payor with either a new Form W-4P or Form W-4V, as applicable. Those making estimated payments can mail the payment along with the Form 1040-ES to the address included on the form or use the IRS on-line payment system to make a payment electronically.When a taxpayer fails to prepay a safe harbor (minimum) amount, they can be subject to the underpayment penalty. This nondeductible interest penalty is higher than what might be earned from a bank. The penalty is applied quarterly, so for example, making a fourth quarter estimated payment only reduces the fourth-quarter penalty. However, withholding is treated as paid ratably throughout the year, so increasing withholding at the end of the year can reduce the penalties for the earlier quarters. This can be accomplished with cooperative employers or by taking an unqualified distribution from a pension plan, which will be subject to 20% withholding, and then returning the gross amount of the distribution to the plan within the 60-day statutory rollover limit. Federal law and most states have so-called safe harbor rules, meaning if you comply with the rules, you won’t be penalized. There are two Federal safe harbor amounts that apply when the payments are made evenly throughout the year.
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Tax and Financial Insights
by NR CPAs & Business Advisors
2026 IRS Mileage Rates: Key Updates and Insights
The IRS has rolled out the inflation-adjusted mileage rates for 2026, offering taxpayers an efficient way to claim deductions for vehicle-related expenses incurred for business, charity, medical, or moving purposes. These adjustments reflect the continued economic shifts impacting car operation costs.
Effective January 1, 2026, the new standard mileage rates are established as follows:
- Business Travel: Increased to 72.5 cents per mile, inclusive of a 35-cent-per-mile depreciation allocation. This marks a rise from the 70 cents per mile rate set for 2025
- Medical/Moving Purposes: Reduced slightly to 20.5 cents per mile, down from 21 cents in the previous year, reflecting the variable cost considerations.
- Charitable Contributions: Consistent at 14 cents per mile, a fixed rate unchanged for over a quarter-century.
As is typical, the business mileage rate considers the integral fixed and variable costs of automobile operation. Meanwhile, the medical and moving rates remain contingent on variable expenses as determined by the IRS study.
It is critical to note that the One Big Beautiful Bill Act (OBBBA) held firm on disallowing moving expense deductions except for specific cases within the Armed Forces and intelligence community, marking a substantial shift since 2017.
When engaging in charitable work, taxpayers might opt for a direct expense deduction over the per-mile method, covering gas and oil costs. However, comprehensive upkeep and insurance costs are non-deductible expenses.
Business Vehicle Use Considerations: Taxpayers can alternatively compute vehicle expenses using actual costs, which might benefit from shifting depreciation rules, particularly through bonuses and first-year advantages. Keep in mind, however, reverting from actual cost calculations to standard rates in subsequent years is restricted, particularly per vehicle protocol and when exceeding four vehicles in concurrent use.
Additionally, parking, tolls, and property taxes attributable to business can be deducted independently of the general rate, an often-overlooked advantage by many business owners.
Tax Strategies for Employers and Employees: Reimbursements based on the standard mileage framework, providing the right documentation is in place, remain tax-free for employees. Meanwhile, the elimination and continued prohibition of unreimbursed employee deductions continue, with particular exceptions offered to qualified personnel across specific occupations.
Opportunities for Self-employed Individuals: Entrepreneurs remain eligible for deductions on business-related vehicle use via Schedule C, with potential to account for business-use interest on auto loans.
Heavy SUVs and Deduction Advantages: Heavier vehicles exceeding 6,000 pounds but under 14,000 pounds open opportunities for substantial tax deductions through Section 179 and bonus depreciation avenues. The lifecycle of such a vehicle bears implications on recapturing initially claimed deductions, urging cautious tax planning.
For professional guidance on optimizing your vehicle-related tax deductions and understanding their implications on tax strategies, contact our office in Coral Gables, Florida, where expert advice and strategic insights are just a call away.
Educator's Deduction Reform: Key Changes Under OBBBA
The One Big Beautiful Bill Act (OBBBA) introduces significant enhancements for educators' tax deductions starting in 2026, offering both strategic opportunities and planning considerations for educators who qualify. With the reinstated itemized deduction for qualified unreimbursed expenses, educators have a broader spectrum of financial relief. This is complemented by the retention of the $350 above-the-line deduction, allowing educators to maximize their tax benefits by selectively allocating expenses between these avenues.
Understanding the nuances of these changes is crucial for educators and financial advisors alike. The dual-option deduction strategy can potentially enhance tax efficiency, thereby aligning with broader financial planning goals.
At NR CPAs & Business Advisors, based in Coral Gables, Florida, our expertise in tax preparation and planning provides invaluable support to educators navigating these changes. Our comprehensive approach, combined with personalized advice from our experienced team, ensures compliance and optimization in line with the latest tax legislations.
Given these updates, it is imperative to engage with seasoned professionals to fully leverage your deduction strategies. Contact us today to streamline your tax planning under OBBBA's new guidelines and maximize your deductions for upcoming tax years.
