Most entity advice online is about tax savings. Almost none of it tells you what changes inside the books the day after you file the paperwork — and that is where new S corp owners get into trouble, usually around month four when nothing reconciles.
Here is what each structure actually asks of your bookkeeping, in plain terms. The election itself is a decision for you and your CPA; this is about what happens to the ledger once it's made.
Sole proprietor and single-member LLC
For tax purposes these two are usually identical. The LLC gives you liability separation; the IRS by default ignores it and taxes the profit on Schedule C with your personal return. Net profit carries self-employment tax, and there is no paycheck for you — money you take out is an owner's draw, not an expense.
The bookkeeping is the simplest version there is. Equity holds two accounts that matter: Owner's Contributions for money you put in, and Owner's Draws for money you take out. Neither one touches the P&L, which is the single most common error in owner-run books — draws recorded as an expense understate your profit and produce a tax return that doesn't match your own reports.
What still matters: a genuinely separate business bank account, and estimated tax payments recorded as a draw (they are your personal tax, paid from your money), not a business tax expense.
Multi-member LLC and partnerships
Add a second owner and the default tax treatment becomes a partnership. The business files its own return, Form 1065, due March 15, and issues each owner a K-1 reporting their share of the profit. Missing that deadline has a per-partner, per-month penalty, so it is worth having on the calendar in January, not March.
In the books, single-owner equity splits into a capital account per member: contributions, draws, and each member's allocated share of profit tracked separately. If two partners take uneven draws all year and nobody tracked them by person, sorting out who owes what at year end is guesswork. Guaranteed payments — an agreed amount paid to a working partner regardless of profit — are their own expense line, separate from draws.
What changes when you elect S corp
This is the real shift. An owner who works in an S corp must be on payroll and take a reasonable W-2 salary before taking profit distributions — that requirement is the whole basis of the tax strategy, and the IRS examines it. The practical consequence is that you now run payroll, withhold and remit taxes, file Form 941 quarterly, and issue yourself a W-2 in January. The company return, Form 1120-S, is due March 15.
Your equity section is rebuilt. Owner's Draws disappears and is replaced by Common Stock and Additional Paid-In Capital for what you contributed, Retained Earnings for accumulated profit, and Distributions for what you take out beyond salary. Money moved to your personal account is either payroll (through the register, with taxes) or a distribution — never a lump transfer nobody classifies.
Two things catch people every year. Personal expenses paid from the business are no longer a sloppy draw to clean up later; in an S corp they need to run through an accountable plan as a documented reimbursement, or they become taxable compensation. And if you own more than 2% and the company pays your health insurance premiums, those premiums have to be added to your W-2 wages before year-end payroll closes — after the last payroll of the year, fixing it means an amended filing.
Switching mid-year, and keeping it clean
An election that takes effect mid-year means one set of books with two owner-pay regimes in it: draws before the effective date, payroll and distributions after. The cleanest approach is to close out the old equity accounts at the effective date rather than letting draws and distributions run side by side for six months, and to make sure the first payroll run lands before the quarter ends so the 941 has something in it.
Evolv Bookkeeping is $199 per month flat: equity set up correctly for the structure you actually have, owner pay classified as payroll or distribution rather than an unlabeled transfer, every account reconciled to its statement, and your P&L and Balance Sheet delivered by day 2 of the following month. 1099 prep is included at year end.
If you elected S corp partway through the year and the books never caught up, cleaning up the backlog is $199 for each month behind, done within 2 days and guaranteed in writing. No contracts, cancel anytime, and you can get an instant quote on our homepage.