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How CPAs Can Add Cost Segregation as a Service

Feb 2026 2 min read

Last reviewed: 2026-02-26

Quick Summary

How CPA firms can operationalize cost segregation for residential rentals.

Tax law changes over time. RentalWriteOff provides bonus depreciation applicability analysis in every report.

Many CPA firms want to add cost segregation as a repeatable service, but the traditional model is slow, expensive, and client-heavy. Here’s a modern workflow approach.

RentalWriteOff delivers engineering-style rigor in a cost segregation documentation package, typically in 2 business days, with a streamlined intake requiring about 5 minutes of client time. CPAs can submit through our Partner Portal, partnership programs are available, and audit support is included with every report we deliver.

For a full overview of our white-label model for larger firms, see our white-label residential cost segregation page for CPA firms.

Three ways CPA firms operationalize cost segregation

  • Referral-style: recommend when clients meet criteria
  • Packaged planning: include as part of proactive tax planning
  • Firm-wide rollout: systematic review for rental clients

How RentalWriteOff reduces workload

  • CPA Portal submission with minimal inputs
  • Fast turnaround
  • Bonus depreciation applicability included for projections
  • Audit support included for confidence

Who to screen in (quick criteria)

  • New acquisition with meaningful taxable income
  • Furnished rental or STR
  • Renovated rental with invoices
  • Higher-basis rentals where acceleration materially changes cash flow

Submit through the Partner Portal with a streamlined intake. Reports typically delivered in 2 business days. Audit support included. See our CPA platform page for partnership details and the full workflow overview.