The FICA tax that supports the Social Security trust funds is not insignificant. It's 15.3% if you're self-employed. Many self-employed people have gotten around this by incorporating their businesses as what have been called "S corporations." This is now being referred to as a "pass-through corporation", a more descriptive term for people unfamiliar with the Internal Revenue Code, which, of course, is most people. Pass-through corporations pass along all their net income to their owner or owners. There's no corporate taxes paid. Payments from a pass-through corporation are not considered wages and are not subject to the FICA tax.
The Republican tax bill that is likely to pass this week adds a huge incentive for switching to a pass-through corporation. Subject to some limits, 20% of income from a pass-through corporation isn't taxed. This huge tax advantage is on top of the exclusion from the FICA tax. Almost everybody with a business will now switch to a pass-through corporation. Many people who aren't now thought of as self-employed will try to find some way of receiving payment for their work through a pass-through corporation.
What effect will this have on the Social Security trust funds? I haven't seen any estimate but it's bound to have a significant negative effect on the trust funds. Of course, in the long run, it's going to leave many people without the quarters of coverage they need to receive Social Security benefits but it will take longer for that effect to become obvious.
By the way, I can't seem to find out whether professional practices such as law firms are excluded from pass-through corporation treatment. The last I heard was that this was an issue still to be resolved. I can't see a reason why a trucker or construction worker is eligible for this but not a lawyer or architect. Really, I don't see why anyone should be eligible for this. It's a massive, intentionally created loophole at the expense of ordinary working men and women.
By the way, even if professional practices are excluded, that doesn't mean that lawyers and other professionals can't benefit. Let's say a law firm forms a corporation that's not a law firm but a "staffing agency." The lawyers wouldn't be employees of the staffing agency but the firm's non-attorney staff would be. The law firm makes a generous enough payment to the "staffing agency" corporation so that it makes a substantial profit which it then pays out to the lawyer owners. Since the staffing agency corporation isn't a professional practice, 20% of the distributions aren't taxed. I can figure this one out and I'm not a tax lawyer or accountant. We'll see what the experts can come up with.
Update: I can now say that law firms are excluded. (page 39). However, I have seen nothing that would prevent a staffing corporation from qualifying and that could achieve much the same result.
By the way, even if professional practices are excluded, that doesn't mean that lawyers and other professionals can't benefit. Let's say a law firm forms a corporation that's not a law firm but a "staffing agency." The lawyers wouldn't be employees of the staffing agency but the firm's non-attorney staff would be. The law firm makes a generous enough payment to the "staffing agency" corporation so that it makes a substantial profit which it then pays out to the lawyer owners. Since the staffing agency corporation isn't a professional practice, 20% of the distributions aren't taxed. I can figure this one out and I'm not a tax lawyer or accountant. We'll see what the experts can come up with.
Update: I can now say that law firms are excluded. (page 39). However, I have seen nothing that would prevent a staffing corporation from qualifying and that could achieve much the same result.