A comparison of the tax advantages and disadvantages of a corporations versus sole proprietorships, partnerships, LPs, LLCs, and LLPs:
| Corporation | Sole Proprietor / Partnership / LLC / LLP | |
| Borrowing from retirement plan permitted | Yes, subject to certain limitations | No |
| Retirement plan contribution limited to earnings from business for which plan was established | No | Yes |
| Additional limitation on deducting retirement plan contributions used to purchase insurance | No | Yes |
| Limitation on forward averaging for certain distributions from retirement plan | No | Yes |
| Possible net operating loss from plan contributions | Yes | No |
| May acquire basis in retirement plan life insurance | Yes | No |
| Interest in retirement plan forfeitures | Yes | No |
| Entitled to $10,000 minimum funding for defined benefit plans | Yes | No |
| Entitled to qualified health plan participation | Yes | No |
| Entitled to qualified sickness, accident, or disability wage continuation plan participation | Yes | No |
| Entitled to qualified group term life insurance plan participation | Yes | No |
| Entitled to $5000 qualified death benefit | Yes | No, but similar amount available from qualified retirement plan |
| 70-percent dividend received deduction available | Yes | No |
| Clear separation of personal and business expenses | Yes | No |
| IRC §303 stock redemption treatment available | Yes | No |
| Unlimited liability | No | Yes (No for limited liability partnership) |
| Unreasonable compensation problem | Yes | No |
| IRS may, under some circumstances, disregard corporate entity for tax purposes | Yes | No |
| May be subject to double taxation | Yes | No |
| Subject to tax on unreasonable accumulation of earnings and profits | Yes | No |
| May be subject to personal holding company tax | Yes | No |
| Must pay Federal Unemployment Tax Act (IRC §§3301-3311) taxes | Yes | No |
| Must pay California unemployment taxes and workers’ compensation premiums | Generally | No |
| Must pay minimum California franchise tax annually | Yes | Depends |
| May be subject to income bunching on incorporation | Yes | No |
| Corporation may have to capitalize partnership retirement payment obligations it assumes | Yes | Not applicable |
| Higher tax cost of liquidation | Yes | Depends |
| Must pay social security taxes | Yes | Yes |
| Net operating loss limitations | Yes | No |
| Passive activity loss limitations | Yes | No |
| Expense payments to employees may be reclassified as constructive dividends | Yes | Not applicable |
| May be subject to additional reporting rules | Yes | Yes |
| Alternative minimum tax on buy-sell agreements funded by corporate-owned life insurance | Yes | Not applicable |
| Can zero out taxable income | Yes, but difficult | Yes |
| S corporation election | Yes | Not applicable |
| Higher legal and accounting costs | Yes | No |
| Professional employees must respect financial separateness of corporation | Yes | No (Yes for limited liability partnership) |