S-Corp Tax Preparation Services Without Adding Headcount
Outsourced Form 1120-S preparation, Schedule K-1 generation, shareholder basis tracking, and reasonable-compensation analysis, handled by trained U.S.-led offshore teams with multi-layer review and turnaround SLAs.
S-corp complexity shouldn't cap your capacity
An S-corp return demands accuracy across K-1 allocations, shareholder basis tracking, reasonable-compensation analysis, and state-level elections. One mistake cascades to every shareholder's personal return – and experienced 1120-S preparers are exactly the people in shortest supply during season.
K-1 Complexity
Multi-shareholder K-1 allocations with different income types, basis limitations, and at-risk rules create error-prone workflows.
Shareholder Basis Errors
35% of S-Corp returns have basis computation errors that expose shareholders to incorrect loss limitations and distribution treatment.
Reasonable Compensation
Officer compensation analysis requires industry benchmarking and documentation that most preparers rush or skip during season.
State-Level Differences
PTE elections, composite returns, and varying state S-Corp rules add layers of complexity that differ across jurisdictions.
Complete S-Corp Tax Execution
From 1120S preparation to shareholder basis tracking – handled by U.S.-trained offshore teams inside your tax software.
1120S Preparation
Complete S-Corp return preparation including income/loss allocation, officer compensation reporting, and all required schedules and statements.
K-1 Generation
Accurate Schedule K-1 preparation for all shareholders with proper income character maintenance, special allocations, and reporting codes.
Shareholder Basis Tracking
Year-over-year shareholder basis calculations including stock basis, debt basis, loss limitations, and distribution analysis.
Officer Compensation Analysis
Reasonable compensation documentation using industry benchmarks, BLS data, and comparable salary studies for audit defense.
Multi-State S-Corp Returns
State-level S-Corp returns including PTE elections, composite returns, and withholding calculations across all required jurisdictions.
M-2 Reconciliation
AAA, OAA, and PTI tracking with proper ordering of adjustments and distribution characterization for all shareholders.
How S-Corp Taxation Works: Pass-Through and Reasonable Compensation
Two ideas drive almost every S-corp return. Get them right and the 1120-S is straightforward. Get them wrong and they are the first things an examiner looks at.
Pass-through taxation
An S-corp generally does not pay federal income tax itself. Profit and loss pass through to the shareholders on Schedule K-1 and are taxed on their personal returns, which avoids the double taxation a C-corp faces on profits and then again on dividends. The 1120-S is largely an information return: it reports the income and splits it correctly among the owners.
Salary vs. distribution
This is where the real tax planning lives. A shareholder who works in the business must take reasonable compensation as W-2 wages, which carry payroll tax. Profit taken above that as a distribution is not subject to self-employment tax, which is the core S-corp savings. The catch is the word reasonable: pay too little salary to dodge payroll tax and you invite an IRS reclassification, back taxes, and penalties.
We document the compensation position, tie the K-1s to the books, and keep the support behind the salary figure so the split holds up if anyone asks. Confirm reasonable-compensation facts and current rules for your situation; the principle is settled, the right number is specific to the role.
S-Corp Tax Deadlines & Penalties
The dates and rules that drive every 1120-S engagement. We track them per entity so nothing slips during season.
Filing Deadline
Form 1120-S is due the 15th day of the 3rd month after the tax year ends. For calendar-year S-corps that is March 15 – and for the 2025 tax year it lands on March 16, 2026, because the 15th is a Sunday.
Extension (Form 7004)
Filing Form 7004 grants an automatic 6-month extension of time to file. It does not extend time to pay – any tax due is still owed by the original deadline, so estimates matter.
Late-Filing Penalty
The IRS penalty is $255 per shareholder for each month (or part of a month) the return is late, up to 12 months. A return over 60 days late carries a minimum penalty equal to the smaller of the tax due or $525 (returns filed in 2026). Because it multiplies by the shareholder count, a multi-owner S-corp accrues penalties fast.
A related trap is the 2% rule: shareholders who own more than 2% of the S-corp must include certain fringe benefits (such as company-paid health insurance) in W-2 wages, then deduct them on the personal return. We flag these during preparation so they are not missed. Deadlines, rates, and thresholds change – we confirm them against the current IRS instructions for your year and facts.
Your S-Corp Team in 3 Weeks
A proven onboarding process that gets your 1120-S returns handled fast – without the typical offshore headaches.
Discovery Call
We map your S-corp mix, complexity levels, K-1 requirements, and state filing obligations.
Team Assembly
We match specialists experienced in 1120-S preparation, shareholder basis, and multi-state S-corp rules.
SOP Training
Your team trains on your workpaper standards, K-1 generation procedures, and basis-tracking conventions.
Pilot Engagement
Start with 30–50 S-corp returns. We prepare, you review. Scale based on results.
Most teams complete onboarding in 2–3 weeks and scale to full capacity within 60 days.
In-House vs. Accountably
S-corp tax preparation typically runs $1,200–$3,000 per 1120-S when outsourced or bought à la carte, and far more once you build the capacity in-house. An experienced S-corp preparer costs $70K–$90K in salary; add basis-tracking complexity, K-1 generation time, and multi-state compliance, and you are at $95K–$120K fully loaded for someone who can handle the full scope without constant supervision.
| Comparison | U.S. In-House Staff | Accountably |
|---|---|---|
| Senior S-Corp Preparer (Annual) | $80,000 – $100,000 | $30,000 – $38,000 |
| Staff S-Corp Preparer (Annual) | $60,000 – $75,000 | $22,000 – $30,000 |
| Time to Productivity | 4–6 months | 2–3 weeks |
| K-1 & Basis Expertise | Varies by hire | ✓ K-1 specialists |
| Multi-Layer QC Built In | ✗ Not included | ✓ 4-tier review |
| Backup Coverage | ✗ No coverage | ✓ Always covered |
| Multi-State S-Corp Coverage | Limited | ✓ Full coverage |
| Turnover Risk | High – specialized skill | ✓ 98.7% retention |
We Work Inside Your Software
Our teams train on your tax software during onboarding – no migration needed.
Drake
Certified TeamLacerte
Certified TeamUltraTax CS
Certified TeamProConnect
Certified TeamCCH Axcess
Certified TeamGoSystem
Certified Team+ Any Other
We'll TrainHow a Growing Practice Scaled S-Corp Capacity 50% Without U.S. Headcount
A practice handling 450+ S-corp returns was turning away new engagements because its 3 U.S. preparers were at capacity. K-1 generation and basis tracking consumed 60% of prep time. With 3 Accountably specialists, it scaled capacity by 50%, reduced K-1 errors to near zero, and freed senior staff for advisory work – adding $200K in new annual revenue.
"We stopped saying no to new S-corp work the month Accountably came on board."
– Rachel Kim, Managing PartnerOffshore S-Corp delivery, built for review protection
Offshore S-corp preparation fails when it is treated like resume-farming – a name on a roster, no SOPs, no review structure. We staff it with proof instead. Every 1120-S moves through a defined workflow so the work that reaches your desk is review-ready, not raw.
| What Drives Quality | Typical Offshore Vendor | Accountably |
|---|---|---|
| Preparer specialization | Generalist staff | ✓ Dedicated 1120-S / pass-through specialists |
| Review layers | Single pass | ✓ Preparer → senior → quality → final |
| Basis & K-1 controls | Ad hoc | ✓ Standardized basis worksheets + K-1 verification |
| Turnaround | Unpredictable | ✓ 3–5 day SLA on standard returns |
| Data security | Varies | ✓ SOC 2-aligned, NDA-backed, role-based access |
| Continuity | Single point of failure | ✓ Always-covered backup |
Four Stages Stand Between a Draft 1120-S and Your Signature
A resume tells you who prepared the return. It does not tell you what reached your desk. We sell the review structure, so every 1120-S clears four stages before a partner ever opens it.
Preparer
A trained 1120-S preparer builds the return, K-1 allocations, and basis worksheets on your SOPs.
Senior Review
A senior checks income character, allocations, and reasonable-compensation support against the books.
Quality Review
A dedicated quality reviewer ties out basis, M-2, AAA ordering, and state elections line by line.
Final Review
A final pass confirms the package is review-ready, so what reaches your desk is checked, not raw.
The point of four layers is simple. Your name goes on the 1120-S, so the work has to be proven before it gets there. The review is the product.
What Your Firm Keeps, What We Carry
Offshore staffing only works when the liability line is explicit. On every S-corp engagement the judgment that carries your license stays inside your firm. We carry the preparation and the review underneath it.
| On Every 1120-S | Your Firm Keeps | Accountably Carries |
|---|---|---|
| The signature and filing | ✓ Partner signs and files | Prepares the return for your signature |
| Reasonable-compensation position | ✓ Final judgment on the number | Benchmarking, documentation, and support |
| K-1 allocations and basis | ✓ Partner-level review and approval | Worksheets, allocations, and basis tracking |
| Client relationship and advice | ✓ Stays with your firm | Structured workpapers behind the file |
| Quality of the prepared file | Reviews a review-ready package | ✓ Four-stage review before handoff |
The signature, the final call, and any partner-level judgment never leave your firm. We carry preparation, structured workpapers, and the review underneath, so what you sign is already checked.
Designed To The Bar a Partner Signs Against
Accountably is built by a Washington-licensed CPA with 7+ years inside US firms, across PwC, a real-estate tax practice, and a full-service firm.
The person who designed this S-corp workflow has signed returns, sat the review cycle, and felt April from inside a firm. That matters on a 1120-S, where reasonable compensation, basis ordering, and K-1 character are exactly the items an examiner opens first and exactly where a rushed preparer creates cleanup.
We are accountants who learned staffing, not staffers who learned accounting. The SOPs, the basis worksheets, and the four-stage review exist because the founder has been the reviewer whose name was on the line. That is the bar your prepared returns are built to.
Common Questions
S-corp deadlines, penalties, and how our outsourced 1120-S preparation works.
Start With a Free 40-Hour Proof Pilot
Proof before your name is on the line. Before any live client file moves, put a fixed 40-hour block of your own S-corp work through our team and grade the result yourself.
We take 40 hours of your real 1120-S work, prepared on your SOPs and your tax software, and run it through the full four-stage review. You see the returns, the K-1s, the basis worksheets, and the workpapers exactly as they would arrive in season. Then you decide, on real work, not on a resume.
If the pilot earns it, we place trained S-corp preparers inside your firm in roughly 3 to 4 weeks. Start with 1 to 3 and scale seat by seat as trust builds. Not the right fit in the first 30 days, we replace them free. On rolloff we shadow and hand over during the notice period, so your workflow never takes a hit.
Ready to Scale Your S-Corp Capacity?
Trained U.S.-led offshore teams for 1120-S preparation, K-1s, and basis tracking. Documented SOPs, four-stage review, and turnaround SLAs. No resume farming. Don't trust us. Test us.