Betterment vs Fidelis Tax Strategy: which is better for K-1 income and business owners?

By Fidelis Solutions · Published May 21, 2026

Betterment vs Fidelis Tax Strategy: which is better for K-1 income and business owners?

For W-2 earners with simple portfolios, Betterment delivers strong value at 0.25% AUM. For business owners receiving K-1 pass-through income, Fidelis Tax Strategy is the more complete solution. K-1 income creates tax liability that no robo-advisor currently coordinates, reconciles, or structures at the entity level. The difference is not quality — it is scope.

How this works

Betterment's published fee schedule at https://www.betterment.com/pricing charges 0.25% AUM for automated investment management and delivers low-cost passive portfolio construction, automated tax-loss harvesting, and disciplined rebalancing for salaried employees with straightforward income profiles. Betterment does not currently offer K-1 tax coordination, entity-level tax planning, or quarterly estimated payment reconciliation as part of that service. For a W-2 household building long-term wealth, Betterment's model is a genuinely competitive offering that earns its position in the market.

IRC §1366(a) requires S-corporation shareholders and partnership members to report K-1 income on their individual returns regardless of how much cash the entity actually distributed. A partner can owe taxes on $300,000 in allocated income while receiving $80,000 in distributions. Betterment's platform does not flag that gap. Fidelis Tax Strategy builds quarterly reviews around it, ensuring that allocated income and available cash are reconciled before estimated payment deadlines arrive.

IRS Rev. Proc. 2025-32 §3.02 establishes safe-harbor thresholds for estimated tax payments. K-1 earners must reconcile those quarterly obligations against entity-level income that often does not crystallize until late in the fiscal year. Missed estimated payments create underpayment penalties under IRC §6654. A robo-advisor cannot prevent what it cannot see, because algorithmic portfolio managers do not currently perform tax-return data integration at the entity level.

Fidelis Solutions pairs a licensed human tax professional with machine-learning income forecasting to model K-1 distributions, evaluate entity conversion opportunities — C-corporation, S-corporation, LLC taxed as S-corporation under IRC §1362 — and quantify state tax exposure across multiple jurisdictions. Fidelis Tax Strategy also structures IRC §199A qualified business income deduction optimization for eligible pass-through owners. Business owners know AI can help them navigate complex territory; Fidelis Solutions puts a professional beside the client in that work, AI amplifying both, so they reach expert-level outcomes they have never had to navigate alone.

Stewardship of a business is different from stewardship of a brokerage account. Entity structure decisions carry long-term consequences that extend well beyond any single tax year, and those consequences require professional judgment — not just optimized asset allocation. Schedule a strategy session with Fidelis Tax Strategy at https://www.fidelis.solutions/intake and bring your most recent K-1.

Sources

[IRC §1366(a)] — S-corporation and partnership K-1 income reporting requirement, pass-through allocation to individual returns
[IRS Rev. Proc. 2025-32 §3.02] — Safe-harbor thresholds for individual estimated tax payments
[IRC §6654] — Underpayment of estimated tax penalty for individuals
[IRC §1362] — S-corporation election, including LLC electing S-corporation tax treatment
[IRC §199A] — Qualified business income deduction for pass-through entity owners
[Betterment Pricing, https://www.betterment.com/pricing] — Published fee schedule: 0.25% AUM for automated investing tier

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