FeeSift

Whatnot US · Safe auction start

Find the lowest start that still meets your profit goal.

FeeSift searches cent by cent for break-even, a target profit, or a target margin—then rounds upward to a practical live-auction start.

Safe auction start calculator

Inputs stay in this browser and are never submitted.

Rules verified August 16, 2026
Safe-start estimate updated. Exact minimum $11.85. Recommended start $12.00. Profit at the recommendation $0.14.

Auction assumptions

Solve your minimum safe start

Results update instantly in USD. Empty optional fields count as zero.

Profit goal

The solver tests every cent until the selected goal first passes.

Recommendation rounding

The exact minimum stays visible; only the friendly start rounds upward.

Business costs

Include every per-sale cost you want the auction to recover.

Enter 0 if the item had no acquisition cost.

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Share of giveaway marketing cost assigned to this sale.

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Whatnot fee assumptions

Select the listing's US fee structure and any seller fee tax that applies to you.

Choose the category structure that applies to this listing.

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Leave blank for none; FeeSift does not guess your local rate.

The fixed processing fee applies to every separate purchase.

Buyer shipping and tax sensitivity

Enter low, expected, and high buyer costs. The expected case drives the recommendation; all three are solved separately.

Low buyer costs
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Expected buyer costs
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High buyer costs
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This solver assumes a standard paid auction sale with no seller coupon and no platform-funded credit. Buyer shipping and tax affect processing fees but are not seller revenue.

A recommendation you can audit

The exact minimum is solved against the versioned Whatnot US rule set. FeeSift shows the previous failing cent, the first passing cent, every rounded fee component, and a separate friendly start.