- January 5, 2026
As you look back to 2025 to determine which expenses you can write off as tax deductible business expenses on your tax return, keep in mind the “ordinary and necessary” rule.
Olsen Thielen Advisor Blog
- December 30, 2025
Waste reduction is a long-term investment to boost a manufacturing company's profitability.
- December 29, 2025
The Internal Revenue Service announced that the optional standard mileage rate for business use of automobiles will increase by 2.5 cents to 72.5 cents in 2026, while the mileage rate for vehicles used for medical purposes will decrease by half a cent, reflecting updated cost data and annual inflation adjustments.
Podcast: Adam Hennen talks with audit partner Brett Olson and valuation specialist Tony Ulman about Transaction Advisory Services and Quality of Earnings, breaking down how financial diligence, adjusted EBITDA, and working capital affect business sales and acquisitions.
- December 29, 2025
The new year will usher in many new 2026 business tax limits that may affect your business. Advance planning will ensure you are taking advantage of the new limits.
- December 15, 2025
If your business has employees or independent contractors, you’re subject to various information reporting requirements. Some significant changes to these rules will go into effect for the 2026 tax year (forms that will be filed in early 2027 to report 2026 amounts).
- December 15, 2025
The rules limiting the business interest expense deduction are complicated. Recent changes could result in larger deductions for 2025 and you need to be aware of the impact on your business.
- December 12, 2025
It is not too late to consider implementing some last-minute tax tips to reduce your business' 2025 tax bill.
- December 12, 2025
Selling the business you’ve spent years building or becoming a first-time business owner by buying an existing business might be the biggest financial move you ever make. We can assess the potential merger or acquisition tax consequences before you start negotiating to avoid tax surprises after the deal is signed.
- December 9, 2025
2025 offers unique opportunities for individuals to lower their tax liability before year-end. This article highlights 2025 year-end tax moves to help you make the most of current law before key changes take effect in 2026.
- December 5, 2025
Inheriting assets involves complex tax rules and time-sensitive decisions that can impact your financial outcome. This article discusses some of the details heirs need to know about real estate, retirement accounts, and other inherited assets.
- November 17, 2025
The "One Big Beautiful Bill - OB3" contains charitable donation changes for businesses and individuals. Read more about some of the Act's provisions to get ideas of how to maximize your 2025 and 2026 deductions.
- November 14, 2025
The IRS 1st Quarter 2026 interest rates will remain the same for the calendar quarter beginning January 1, 2026.
- November 13, 2025
The Internal Revenue Service has announced the 2026 401(k) contribution limits and guidance on cost-of-living adjustments and other retirement-related items for tax year 2026.
- November 10, 2025
Our Tax Planning Guide helps keep up with a lot of the current tax law changes. With the passage of the One Big Beautiful Bill Act (OBBBA) on July 4, 2025, many Tax Cuts and Jobs Act (TCJA) provisions, including lower individual tax rates, are now permanent.