I never understood this argument. I am a business owner. I optimize for personal profit, which is the profit from my business, with some percentage cut out for taxes. When I optimize my business profit, the tax rate is not part of the equation. If I find that hiring someone for $100k / year is a good thing to do for the long term profitably of the company, I will do that. If I need to spend $50k on a machine because it will save me $80k a year in costs, I'll do that. The tax rate is never an issue. It's just some fraction of my already optimized business income that I was able to bring in for the year. Whether that fraction is 15%, 25%, 50% etc makes no difference in any business decision I have previously made. (Unless of course the tax rate is 100%, then there would be no reason for me to work).
A corporate tax rate of 100% wouldn't have any real effect on your personal business. You could still run a business, paying yourself a handsome salary and making a good living for yourself, without ever running a business profit year-over-year.
I am also a small business owner. Agree, everyday expenses I don't evaluate against how much in taxes I am going to pay. However at public companies scale and the rule of large numbers applies. It makes a significant impact to bottom lines and profits of corporations.
I still have yet to hear any concrete ways a corporate tax hike impacts business decisions. I tried doing some research, I found this snippet that attempts to explain it:
"Therefore, when a corporation is forced to pay high amounts of income tax, the company may not be able to grow and offer employment to new employees. In fact, one of the most common ways that corporations respond to large corporate tax hikes or new types of corporate taxes is to begin to lay off workers or employees in order to cut costs and maintain profit margins."
Let's say company ABC makes lawn mowers. Corporate tax rate is 20%. They sell their lawn mowers for $200 each and cost to manufacture each unit is $150 for a $50 profit. They sell 100,000 units in a year, making $5M in profit for the year. At 20% tax, they get to keep $4 million of that. If the tax rate is suddenly bumped to 40%, then they only keep $3 million. But I don't see how that impacts any of their business decisions related to building and selling lawn mowers. Their goal is to maximize profit by building the lawn mowers as efficiently as possible and then selling as many of them at they can at some price point. Expenses and wages to do all of that are all tax deductible. The tax rate does not figure into any of these decisions. That only comes into effect at the end of the year after they've made as much profit as possible from their sales. If they respond by laying off employees, then they should have done so before the tax break, and are probably just using the tax break as an easy excuse to get rid of people they don't want working there anymore. What part of this do I have wrong?