United StatesServices Tax filingsForm 1120-S preparation

Tax filings

Form 1120-S preparation for US businesses

The S-corp return, shareholder K-1s and the reasonable-compensation file that supports it.

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What is form 1120-s preparation?

The S-corp return, shareholder K-1s and the reasonable-compensation file that supports it.

An S-corp files Form 1120-S every year it holds the election, whether or not it made money — the form itself pays no federal tax. What it reports is who owns the company and how much of the year's income or loss belongs to each of them, transmitted to each shareholder on a Schedule K-1 that then feeds their personal Form 1040. The appeal of the structure is that pass-through income isn't hit with the corporate 21% rate a C-corp pays before its shareholders are taxed again on dividends. The cost of that appeal is a set of eligibility rules and a compensation requirement that, if missed, can undo the whole election.

Every S-corp with a shareholder who also works in the business has to run payroll for that shareholder before it can call anything else a distribution. The IRS's rule is that a shareholder-employee must be paid "reasonable compensation" — a real W-2 salary reflecting what the work is worth — before any profit is paid out as a distribution. Distributions carry no payroll tax; W-2 wages do. An owner who takes $10,000 in salary and $150,000 in distributions from a business where they do all the work has an obvious gap between what the job pays and what the shareholder actually earned, and the IRS has litigated this exact fact pattern for decades. There's no statutory dollar figure for "reasonable" — it's a facts-and-circumstances test built from comparable-role pay data, hours worked, and what the business would have paid a non-owner to do the same job.

Who does what

Prepared with partner CPA firms who review, sign and file.

Who does what

Your CapEasy teamForm 1120-S preparation, the reconciliations and reporting behind it, and the questions list that keeps it honest.
Your CPA or enrolled agentEverything that carries a licence in United States — rendered exactly as written: issue compilation, review or audit reports — those are restricted to licensed cpa firms.
YouOne conversation with one named person, and the decisions that are genuinely yours.

Form 1120-S preparation in United States

Reasonable compensation isn’t optional once a shareholder does the work

A shareholder who performs more than minor services for an S-corp is legally an employee of it first and a shareholder second, for payroll-tax purposes. The IRS's own guidance is unambiguous that compensation has to be paid before distributions and has to reflect what the services were actually worth — not a token salary designed to shift income into lower-taxed distributions. We build the comparable-role pay documentation, the hours-worked record, and the payroll history that supports the salary figure the partner CPA firm signs off on; setting the actual number is the shareholder's decision on the CPA firm's advice, not ours.

A nonresident alien shareholder ends the S-election, full stop

Under IRC 1361, an S-corp’s shareholders are limited to individuals, certain trusts and estates — never a partnership, a corporation, or a nonresident alien individual. A single NRA shareholder, even holding one share for one day, terminates the election as of that date; the corporation reverts to being taxed as a C-corp unless a new election is properly re-made later, and re-election generally has its own waiting period. We flag any change in ownership against this bar before it’s treated as routine, and the eligibility determination on any borderline case — dual-status individuals, trusts with foreign beneficiaries — is the partner CPA firm’s call.

One class of stock means distributions track ownership percentage, not convenience

S-corp eligibility also requires a single class of stock — every share carries identical rights to distributions and liquidation proceeds. Distributions that don’t track ownership percentage cleanly (a disguised second class of stock through, say, a shareholder loan that behaves like preferred equity) can itself jeopardize the election. We reconcile distributions against the cap table for the year the return covers and flag anything that doesn’t track ownership evenly, for the partner CPA firm to assess.

The S-election itself has its own filing window, separate from the annual return

Form 2553 has to be filed within roughly two months and fifteen days of the start of the tax year the election is meant to cover (or at any point during the prior year). Miss that window and the corporation defaults to C-corp treatment for the year, with the election — if still wanted — only taking effect the following year. This is a one-time filing question we flag for any new S-corp client, distinct from the 1120-S that gets filed every year afterward.

What your CPA or enrolled agent receives from us

  • A closed year-end trial balance and general ledger reconciled to the bank and any merchant-processor statements for the period the return covers.
  • A completed shareholder cap table for the year, showing ownership percentage and any changes in holdings, dated.
  • A confirmed S-election status check — Form 2553 acceptance on file, or a flag if it was never confirmed with the IRS.
  • A reasonable-compensation file per shareholder-employee: comparable-role pay data, hours worked, payroll history for the year, and the resulting W-2 total, reconciled against total distributions taken.
  • A distributions ledger for the year, broken out per shareholder and checked against ownership percentage for consistency with the one-class-of-stock rule.
  • A draft Schedule K-1 per shareholder, with income, deductions and credits allocated per their ownership share for the CPA firm to review before issue.

Questions worth asking before you start

Who actually does the work — a person or an AI tool?

A named person on our team owns your file and reviews everything that leaves it. Software does a real share of the grinding underneath it — coding, matching, flagging the obvious gaps — but nothing regulated happens without a person’s judgement, and nothing here is signed or filed by an algorithm.

Who can legally file this?

Prepared with partner CPA firms who review, sign and file.

Which software do you work in?

Whatever you already run. Most commonly QuickBooks, Xero, NetSuite, Sage, Zoho Books and a handful of others — we work inside your system rather than moving you onto one of our own.

How does this actually start?

A short, free read-only look at what you already have, and a written note on what we found. A scoping call decides the size of the engagement — nothing here commits you to anything.

What does it cost?

There is no published price for form 1120-s preparation — it depends on volume, how many entities are involved, and how far behind the books are. We quote after the read-only review, which is free.

How does this fit with the rest of tax filings?

Form 1120-S preparation sits inside tax filings, alongside Form 1040 preparation, Schedule C & self-employment taxes, Form 1065 & K-1 preparation. Most clients end up buying the category as a whole rather than one leaf at a time, but starting narrow is fine.

Does CapEasy sign or file our Form 1120-S?

No. CapEasy prepares the return, the K-1s and the reasonable-compensation file behind it. A partner CPA firm reviews the return, signs it as paid preparer, and files it with the IRS.

What is "reasonable compensation" and who decides the number?

It’s the W-2 salary a shareholder-employee has to be paid before any profit is taken as a distribution, sized to reflect what the work is actually worth. There’s no fixed IRS formula — it’s built from comparable-role pay data and hours worked. We assemble that documentation; the partner CPA firm advises on the figure and the shareholder decides it.

Can a nonresident alien own shares in our S-corp?

No. Under IRC 1361, S-corp shareholders can only be individuals, certain trusts and estates — never a nonresident alien individual, a partnership, or a corporation. A single NRA shareholder terminates the election on the date they acquire stock.

What happens if the S-election terminates because of an ineligible shareholder?

The corporation reverts to being taxed as a C-corp from the date of the disqualifying event, and re-electing S status generally requires waiting a period before a new Form 2553 can be filed. We flag any ownership change against the eligibility rules before it’s treated as routine so this gets caught early, not on an exam years later.

When is Form 1120-S due, and can it be extended?

March 15 for a calendar-year S-corp — the same date as a partnership return. An automatic six-month extension to September 15 is available by filing Form 7004 before the original deadline.

Does CapEasy determine whether our distributions are proportional to ownership?

We reconcile distributions against the cap table for the year and flag anything that doesn’t track ownership evenly, since uneven distributions can be read as a disqualifying second class of stock. The eligibility assessment itself is the partner CPA firm’s call.

We haven’t confirmed our S-election was ever accepted by the IRS — can CapEasy check?

Yes. We check for confirmed S-election status (the IRS’s CP261 acceptance letter, or a matching record) as a first step on any new S-corp engagement, rather than assuming a return filed in a prior year proves the election is valid.

Do state returns come with the federal 1120-S, or are they separate?

Separate. Every state the corporation is registered in or has nexus with needs its own corporate or franchise return, and some states don't fully recognize the federal S-election — the corporation can owe state-level entity tax even while paying no federal entity tax. We summarize the state-nexus picture for the partner CPA firm to scope those filings.

What if a shareholder also has a loan to or from the company?

We list every shareholder loan and its terms separately in the handoff file, because a loan structured with a fixed return regardless of profit can itself be read as a disqualifying second class of stock. The partner CPA firm assesses it on its facts.

How does CapEasy build the K-1s?

From the closed, reconciled books for the year, with income, deductions and credits allocated per each shareholder's ownership percentage. Drafts go to the partner CPA firm for review before any K-1 is issued to a shareholder.

What if we’re considering an S-election for the first time — does CapEasy handle Form 2553?

We flag the filing window — generally within two months and fifteen days of the start of the tax year the election is meant to cover — and prepare the supporting documentation. The election itself, and the eligibility determination behind it, is advised on and filed with the partner CPA firm.

Your CapEasy experts

Connect with us

Talk to the people who handle this work every day — no call centre, no hand-offs.

Ayush Joshi

Ayush Joshi

Co-Founder

Ex-OYO and Tenaciousfly. 7+ years in business development, strategic acquisitions, financing and debt syndication.

Aditya Jain

Aditya Jain

Co-Founder

Ex-Bank of America. 4+ years in investment banking, EU & Indian compliances, ESG compliances, and project management.

Manav Raval

Virtual CFO & Tax Specialist

Section 80-IAC, tax planning and startup compliance. Previously at Toyota Motor Corporation and Jaguar Land Rover.

Ayush Faldu

Virtual CFO & Tax Specialist

Financial strategy, budgeting and cash flow — a CFO’s judgement, monthly.

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