For CPA firms adding offshore tax capacity specifically for busy season. Covers scoping decisions, ratio planning, onboarding timeline, compliance documentation, workflow design, and year-over-year learning curve. Written for firms deploying offshore capacity for the first or second time.
Firms that successfully add offshore tax capacity start planning in September for the following tax season. Later planning compresses decision quality:
Tax season runs. Weekly review meetings. Year-over-year data capture for improvement.
Offshore tax preparation shifts the bottleneck from preparation to review. Each US senior reviewer can handle 2–3 offshore preparers at full season productivity. Beyond that ratio, review queues back up and review quality suffers.
Staffing math:
Typical offshore tax preparer throughput (January 15–April 30 window):
Firm billing average $1,200 per return, offshore preparer cost $2,600/month for 3.5 months = $9,100 seasonal cost. 70 returns × $1,200 = $84,000 gross revenue. Revenue-to-cost ratio approximately 9x gross, even after accounting for review time, support, and overhead.
Year 1 actual experience typically: 50–55 returns per preparer (ramp-up affects productivity), ratio 6–7x. Year 2 hits full productivity.
For India-based preparers working US night shifts: preparer works approximately 7pm–4am Eastern (7:30am–4:30pm India). US reviewers come in at 9am Eastern to find completed returns ready for review. Returns move through firm in 24-hour cycles: US intakes and assigns on day 1, offshore preparers that night, US reviews day 2, partner approves day 3, client delivery day 3 or 4.
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