Duolingo, Inc. (DUOL) Cash Flow Statement

The consistently wide ratio between operating cash flow and net income suggests that GAAP earnings are depressed by non-cash charges, most visibly stock-based compensation of $29M to $48M per quarter, and by the upfront collection of annual subscriptions. The 0.29x ratio in 2025Q3, driven by a $292.2M net income figure that appears to include a non-operating tax benefit, indicates that single-quarter net income is an unreliable anchor for conversion analysis. Investors should monitor whether the ratio normalizes as one-time items roll off, since a persistently high multiple could also reflect deferred revenue build rather than durable earnings power.

The 2026Q1 spike to $150.6M of FCF coincided with a $59.3M working capital inflow, which suggests a meaningful portion of that quarter's cash generation reflects timing rather than repeatable profitability. The subsequent compression to 24.4% in 2026Q3, despite revenue still growing, indicates that cash margins are sensitive to billing cycles and operating spend. Analysts should treat the trailing average rather than any single quarter as the base for valuation.

Duolingo's asset-light, cloud-based model requires little physical investment, and D&A of roughly $3.6M to $4.3M per quarter sits well below CapEx in most periods, suggesting some capitalized development spend that may be running ahead of depreciation. The low intensity supports high cash conversion, though the rising CapEx in recent quarters warrants monitoring to determine whether it reflects product or infrastructure investment.

The pattern is consistent with annual subscription prepayments collected ahead of revenue recognition, which lifts operating cash flow in periods of heavy renewal activity. The reversal in 2025Q3 and the slowdown in billing-driven inflows suggest that cash generation could weaken if renewal timing shifts or if the mix moves toward monthly plans. Investors should monitor deferred revenue alongside billings to separate genuine demand from collection timing.

Free cash flow has been largely retained, and the sizable buyback in 2026Q2 suggests management is beginning to offset dilution, though stock-based compensation of $34M to $48M per quarter likely absorbs a substantial share of those repurchases. The modest acquisition outlays suggest capital is not being deployed into M&A, which keeps the balance sheet liquid but leaves open the question of how excess cash will ultimately be allocated.