Estimate the Financing Cost of a Marketplace Payout Reserve

How to Use This Tool

Put a capital cost on sales proceeds held back by a marketplace. A reserve may not change accounting revenue but it can create a real cash gap for inventory and fulfilment.

Why Marketplace Reserve needs more than a raw total

Separate the amount held from its financing cost; a longer delay matters only through the time value assigned to cash. For this page, the useful comparison is financing cost of the reserve, not whichever input happens to be largest. The Marketplace Reserve result answers the decision in the heading and should not be reused as a score for a different workflow.

The exact Marketplace Reserve formula

Financing cost equals reserved sales × annual capital rate × holding days ÷ 365. The visible fields are Sales subject to reserve, Reserve held, Average holding period and Annual cost of capital. For Marketplace Reserve, read each printed unit before entry and make the values describe one transaction, cohort or reporting window. If those scopes differ, the displayed financing cost of the reserve may be arithmetically valid but operationally meaningless.

Interpreting financing cost of the reserve

Add the reserve to peak working-capital planning and compare financing alternatives before a high-volume launch. The ten-percent comparison is deliberately narrow: it tests the influence of sales subject to reserve and is neither a forecast nor a confidence interval. Preserve the values used, their dates and the resulting decision so a later reviewer can reproduce why Marketplace Reserve supported the choice.

What this Marketplace Reserve model leaves out

Rolling release schedules, chargebacks, reserve tiers, taxes and changing sales volume are excluded. That is where Marketplace Reserve stops being trustworthy. If an excluded factor could reverse financing cost of the reserve, extend the model explicitly or use the authoritative account system instead of hiding the factor inside an unexplained adjustment.

Evidence and independent verification

The reference reviewed for Marketplace Reserve is U.S. SBA — Manage your finances. U.S. SBA — Manage your finances supports the named definition or rule but does not supply private values for financing cost of the reserve. Before acting on the result, reconcile the worked example with the relevant dashboard, invoice, export or measurement.

Private, reproducible calculation

Marketplace Reserve runs its arithmetic in the current browser tab and requests no login or API key. That keeps the Marketplace Reserve inputs away from the site's calculation server, while leaving the user responsible for detecting stale data or a changed platform rule. When an assumption changes, reopen U.S. SBA — Manage your finances and rerun the saved Marketplace Reserve scenario.