☕ In-House vs. 3PL Fulfillment — Make-vs-Buy Model

36-month projection built from 731 days of reconstructed fulfillment history. Adjust assumptions live.

Assumptions

    Break-even month
    3-yr NPV — 3PL (Buy)
    discounted total cost
    3-yr NPV — In-house (Make)
    incl. capex & lease
    NPV advantage

    Cumulative fulfillment cost (36 months)

    3PL — Buy In-house — Make Break-even

    Monthly fulfillment cost & projected order volume

    3PL monthly In-house monthly Orders/mo (right axis)

    Sensitivity — recommendation if volume runs ±20%

    Positive Δ = in-house saves money over 3 years (NPV). Negative = stay with the 3PL.

    Year-by-year cost summary

    PeriodAvg orders/mo3PL costIn-house costAnnual Δ