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.
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 staffing – resumes, no SOPs, no review structure. We run it as a delivery system 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 |
Common Questions
S-corp deadlines, penalties, and how our outsourced 1120-S preparation works.
Ready to Scale Your S-Corp Capacity?
Trained U.S.-led offshore teams for 1120-S preparation, K-1s, and basis tracking. Documented SOPs and turnaround SLAs. No resume farming.