S Corp Accountant Cost Per Year: Payroll, 1120-S, Books, K-1

What does an S corp accountant or CPA cost per year, and what drives it?

No government source sets or publishes what preparers charge, so this page gives no price list. It shows what the law makes an S corporation file each year, because a yearly bill is the cost of those filings and of the books behind them.

A calendar-year S corporation whose owner works in the business generally has this calendar (IRS: S corporations; Form 1120-S instructions; IRS: employment tax due dates):

When a due date falls on a weekend or legal holiday, the next business day applies. A corporation files Form 1120-S for every year its election stays in effect, whether or not it owes tax. That duty rests on a Form 2553 election the IRS accepted. With no IRS confirmation, the instructions say to follow up; with a form filed late or never, relief for a late-filed election may be available if requested within 3 years and 75 days of the intended effective date and the other conditions are met (Form 1120-S instructions; Form 2553 instructions).

Books are not a filing, but every line above is built from them: the Schedule L balance sheet, where required, should agree with the corporation's books, and the payroll reports must tie to what was paid (Form 1120-S instructions).

If you hold a bundled quote that does not say whether payroll, the 1120-S, state filings and books are all in it, or a first bill after electing, get the scope in writing before you compare totals. A case also stops being simple with books that are behind, an owner who has never been on payroll, several shareholders, rental property, income from abroad, more than one state, or an owner who is not a US citizen or resident (a nonresident alien cannot be a shareholder, per IRS: S corporations). Each adds work and can turn a routine quote into a different job.

Gather before asking for a quote:

• The written quote or engagement letter.
• The IRS acceptance of Form 2553 and last year's Form 1120-S, if any.
• Payroll reports: Forms 941, 940 and W-2.
• Bank and card statements for the year.
• The shareholder list with ownership dates.

What is in a bundled S corporation bill: books, payroll, the 1120-S and K-1s?

A bundled bill prices books, payroll, the federal return with K-1s, state filings, and sometimes the owner's Form 1040 as one fee; the quote table below shows how to split it. For what books an S corporation needs, see S corporation bookkeeping.

A preparer's fee is separate from what the corporation owes the government. Taxes, penalties and state minimum taxes are amounts owed to the government, not part of the fee.

Is the owner's personal Form 1040 part of the bundle?

It is a separate return, so a quote may price it as its own line or leave it out. An S corporation's income is reported on each shareholder's own return, so the owner files Form 1040 with Schedule E and any other forms the K-1 calls for, and may owe estimated tax on that income on Form 1040-ES (IRS: S corporations).

Basis adds work. A shareholder who received a non-dividend distribution, claims an aggregate loss, sold stock or was repaid a loan files Form 7203, which figures the limits on how much of the corporation's losses and deductions the owner can use (Form 7203 instructions). A quote for the Form 1040 should say whether basis work is included; see S corporation shareholder basis.

What makes the 1120-S and K-1s more work?

Each extra shareholder, schedule or asset type adds work, and the late-filing penalty grows with the number of shareholders. The Form 1120-S instructions tie each item to a form:

Why does an S corp owner's W-2 payroll cost money every quarter?

A corporate officer is generally an employee, so an S corporation whose owner works in the business generally pays that owner through payroll, and payroll brings filings on a fixed calendar even when the salary is small (IRS: paying yourself). The IRS expects reasonable compensation for the owner's services before non-wage distributions, and can reclassify distributions as wages (IRS: compensation issues).

What payroll files:

• Every pay date: withhold income tax and the employee share of Social Security and Medicare tax, and pay the employer share (Publication 15).
• Deposits: generally on a monthly or semiweekly schedule. Form 941 tax below $2,500 for the current or prior quarter can be paid with a timely return instead, unless a next-day deposit arose that quarter. Accumulating $100,000 or more in a deposit period requires a deposit by the next business day (Publication 15).
• Each quarter: Form 941. A small employer the IRS has approved files Form 944 once a year instead (IRS: employment tax due dates).
• Each year: Form 940 for federal unemployment tax on the first $7,000 paid to each employee, and Forms W-2 and W-3 by January 31. Most employers also pay a state unemployment tax (IRS: Topic 759).

An officer-owner treated as a non-employee leaves the corporation liable for the employment tax it did not withhold, and possibly the trust fund recovery penalty, a penalty for withheld payroll tax that was not paid over (IRS: paying yourself). For how much salary to take, see S corporation owner salary. If payroll was never run, see S corporation payroll never run.

What do state filings add to the bill?

A federal S election does not decide state treatment, so the state items in a quote depend on where the corporation operates and where its owners live: some states tax the S corporation itself, and some require withholding on income of owners who live elsewhere. Check each state's revenue department page. Three examples:

The K-1 must carry the information shareholders need for their state and local returns (Form 1120-S instructions). Which states let an S corporation pay tax at the entity level by election is in pass-through entity tax by state.

What does a late return or late payroll filing cost on top of the fee?

Penalties are charged to the corporation on top of any preparer's fee, and the Form 1120-S penalty applies even when no tax is due (Form 1120-S instructions; IRS: failure to file penalty).

When a return and its payment are both late in the same month, the late-filing percentage is reduced by the late-payment percentage, so the two do not stack. Both are a share of the tax due with the return, not of wages (Publication 15). The late-filing, late-payment, late-deposit and statement penalties do not apply to a failure due to reasonable cause. A timely Form 7004 moves the Form 1120-S penalty start to the extended date; it does not extend time to pay, and interest runs on tax paid late (Form 7004 instructions; Form 1120-S instructions). For relief requests and notices, see late-filing and payment penalties.

Am I paying too much? How do I read a bundled quote line by line?

Compare lines, not totals. A quote that names payroll, the Form 1120-S and K-1s, state filings and books as separate jobs can be checked against the filings the corporation owes; a single line such as "tax preparation" cannot. A lower total that leaves out payroll or state filings is not a cheaper quote for the same work.

Anyone with a preparer tax identification number may prepare returns for pay, and credentials differ. The IRS keeps a directory of preparers who hold recognized credentials (IRS: choosing a tax professional). For broader quote comparisons, see small business accountant cost and bookkeeping cost per month.

Can a CPA charge a fee based on my refund or the tax saved?

Generally not. Circular 230 bars a practitioner, such as an attorney, certified public accountant or enrolled agent, from charging a contingent fee for a matter before the IRS, with narrow exceptions (31 CFR 10.27; 31 CFR 10.3).

The rule defines a contingent fee as one that depends, in whole or in part, on whether a return position avoids IRS challenge or is sustained. That includes a fee set as a percentage of the refund or of the taxes saved, so a fee quoted as a share of what the S election saves may fall within the definition. A matter before the IRS includes tax planning and advice and preparing or filing returns and claims.

The exceptions are narrow: IRS examinations or challenges, certain amended returns and refund claims, claims limited to interest or penalties, and court proceedings. The rule also bars an unconscionable fee. A flat or hourly fee does not depend on the result.

One limit: in 2014 a federal district court held that the IRS lacks authority to regulate fees for ordinary refund claims, meaning claims filed after the original return and before any IRS examination (Ridgely v. Lew). The ruling concerns those claims only, and the regulation still reads as above.

The rule is written for practitioners, so ask what credential your preparer holds.

Does the S election still pay after these costs?

The election adds payroll for the working owner, a Form 1120-S with K-1s, and any state return or minimum tax to the yearly bill. It pays only if the tax it saves is larger than that added cost.

Where it saves tax, the usual source is that the owner's pay for services is wages, while non-wage distributions are not subject to employment taxes; the IRS can reclassify distributions as wages if the salary is too low (IRS: compensation issues). Other effects, such as the state entity taxes above, also change the result. The saving depends on how much profit sits above a reasonable salary, so a corporation whose profit is near or below that salary may have little to save on. The break-even math is in when an S corporation election pays off.

Example

These examples use US dollars and round numbers. They show scope, not prices or advice.

One-owner consulting corporation

An S corporation has US$180,000 of profit and pays its one owner a US$90,000 salary. That figure is an illustration, not a view of what is reasonable. The year's work is:

• Twelve months of books.
• Four Forms 941 and one Form 940.
• One Form W-2, with a Form W-3.
• One Form 1120-S with one K-1.
• Any state return or minimum tax.
• The owner's Form 1040 with Schedule E, and Form 7203 if distributions were taken.

A quote should name each line and say whether the state filings and the Form 1040 are in. A quote that says only "tax preparation" does not answer that.

Two shareholders, a return filed two months late

A two-shareholder S corporation files its Form 1120-S two months after the due date, with no extension. For a return required to be filed in 2026, the penalty is US$255 x 2 shareholders x 2 months = US$1,020 before any relief, using the per-shareholder amount in the penalty table above. It is charged on top of the preparer's fee, even if the corporation owes no tax. If both K-1s also reached the shareholders two months after the due date, the instructions treat them as late (the statute sets the K-1 date at the day the return is filed), and the separate K-1 penalty in the table is US$130 each (US$340 each if furnished after August 1), unless reasonable cause applies.

A single-member LLC elects S status mid-year

A single-member LLC, taxed until now on its owner's personal return, files Form 2553 with an effective date of July 1, no later than 2 months and 15 days after that date, which is September 15. A later filing needs late-election relief, which generally must be requested within 3 years and 75 days of July 1. From that date the LLC is treated as a corporation (Form 2553 instructions). The owner's pay for services from July 1 goes through payroll, so if no payroll ran before July 1, the first year has two Forms 941 (third and fourth quarters), not four. The corporation files a Form 1120-S for the period beginning July 1, and its books must keep salary apart from distributions from that date. Before July 1 the LLC's income stays on the owner's personal return (IRS: single member LLCs).

Different for you?

• You hold a bundled quote or a first bill after electing and cannot tell whether payroll, the 1120-S, state filings and books are all covered, or your books or owner payroll are behind: a professional can settle which filings the corporation owes, what each quote line covers, and whether S status still fits. See bookkeeping for the books and corporate tax returns for the 1120-S and K-1s.
• You never ran payroll for yourself: see S corporation payroll never run and get bookkeeping help.
• This is the first year after electing: see books after an S corporation election.
• A return or payroll filing is late, or a penalty notice arrived: see late-filing and payment penalties.
• The books are months or years behind: see S corporation catch-up books and catch-up bookkeeping cost.
• The Schedule L balance sheet will not balance: see S corporation balance sheet not balancing.
• You are deciding whether to elect, or how much salary to take: see when an election pays off and S corporation owner salary.
• You are thinking of preparing the Form 1120-S yourself: see filing your own S corporation return.
• An owner lives abroad or is not a US citizen or resident: see LLC or S corporation while living abroad.