S-Corp Bookkeeping and Tax Prep: Collective, Bench, and the DIY Option (2026)
Scoped to the S-Corp owner's 1120-S preparation need. Most "best bookkeeping" articles are generic; we focus on bookkeeping + 1120-S + payroll integration for a one-person S-Corp.
We take no commissions from the services named on this page. Our comparisons are based on S-Corp-specific capabilities and published pricing, not on any commercial relationship.
What S-Corp Owners Specifically Need
An S-Corp owner needs more than basic bookkeeping. Required annually: Form 1120-S (S-Corporation Income Tax Return), K-1s to all members, W-2 issuance, payroll coordination, and reasonable salary documentation. Most generic bookkeeping services handle only the bookkeeping and outsource the 1120-S preparation at additional cost. S-Corp specialists include both.
The specific S-Corp nuances to verify: does the service handle the >2% shareholder health insurance W-2 add-back? Does the 1120-S preparation include shareholder basis tracking (important for multi-year S-Corps with losses)? Does it integrate with payroll (Gusto, OnPay)?
Service Comparison
- + LLC + S-Corp election handled
- + Monthly bookkeeping
- + 1120-S preparation
- + Payroll integration (built-in)
- + Quarterly estimated tax alerts
- + Reasonable salary guidance
The only service specifically designed for the solo-LLC-electing-S-Corp use case. Handles the entire stack: formation, election, payroll, bookkeeping, 1120-S. Not a generic bookkeeping service with S-Corp tacked on.
Expensive at $349/mo ($4,188/yr). Compared to DIY ($800-$1,200/yr for 1120-S from a standalone CPA), the premium is about $3,000/yr for the convenience and integration.
- + Monthly bookkeeping via dedicated bookkeeper
- + 1120-S prep via Bench Tax (add-on)
- + QuickBooks export
- + No integrated payroll
Clean interface, responsive support, dedicated bookkeeper. 1120-S available as add-on via Bench Tax.
Payroll integration is not native (needs Gusto or QuickBooks Payroll separately). Total cost with tax add-on can exceed Collective. Bench has had service continuity issues: it abruptly shut down in December 2024 and was acquired days later by Employer.com, which restored the platform and continues to operate it. Confirm the service still fits your needs before committing.
- + Monthly bookkeeping
- + Tax add-on available
- + Strong GAAP compliance
Excellent for VC-funded startups or businesses needing strong financial reporting. GAAP-compliant books.
Expensive. Not specifically optimised for solo-LLC-S-Corp use case. Better fit for a Series A startup than a freelancer.
- + Bookkeeping
- + Tax preparation
- + Dedicated accountant
Full-service, handles 1120-S and personal return. Nationwide presence.
Mixed Trustpilot reviews. Pricing opaque. Many reviews cite communication issues and errors. Service quality inconsistent based on which accountant is assigned.
The DIY Option: QuickBooks + Standalone CPA
For a cost-conscious solo S-Corp owner, the DIY approach: QuickBooks Online Simple Start for bookkeeping ($38/mo), Gusto Simple for payroll ($49/mo base + $6 for one employee = $55/mo), and a standalone local CPA for the 1120-S preparation ($800-$2,500/yr one-time annual fee).
Total annual cost: about $1,116/yr (bookkeeping + payroll) + $800-$2,500 (1120-S) = $1,916-$3,616/yr. Compared to Collective at $4,188/yr, the DIY path saves roughly $570-$2,270/yr depending on your CPA fee.
The DIY path requires: (1) consistent bookkeeping throughout the year, (2) correct payroll setup (including health insurance W-2 add-back), and (3) a CPA who specifically handles 1120-S returns. Not all CPAs do. Ask specifically about S-Corp experience when vetting.