These are free, ungated calculators for U.S. importers and brokers. Each tool implements a published government formula — the CBP bond-sizing rules, the ITA's foreign-trade-zone savings worksheet — and cites its primary source on the page, so you can check our math against the regulation it ports. We build trade compliance software, not bonds or brokerage, so the numbers are neutral: no quote upsell, no email gate, and honest caveats where a formula's age or a 2026 policy change limits what it can tell you.
Size a continuous import bond the way CBP does — 10% of your last 12 months of duties, taxes, and fees against the $50,000 minimum, with CBP's rounding tiers — plus single-transaction bond math. Built for the 2026 tariff surge, when CBP re-checks sufficiency monthly.
Ports 19 CFR Part 113 and CBP's bond sufficiency guidance
Estimate annual duty savings from foreign-trade-zone production across inverted tariff, scrap, deferral, and export benefits — verified cell-by-cell against the government workbook, with the 2026 caveats the original predates.
Ports the ITA Duty Savings Estimator (trade.gov)
The two mandatory government fees on every entry: Merchandise Processing Fee at FY2026 rates (0.3464%, $33.58 minimum, $651.50 cap, informal flats) and Harbor Maintenance Fee (0.125%, ocean only, no cap).
Figures read directly from the Federal Register FY2026 notice
Every customs recovery clock as a date: the 180-day protest window, PSC window, deemed liquidation, scheduled-liquidation estimate, 1520(d) FTA claims, and the 5-year drawback limit — each row cites its statute.
Ports 19 USC 1514, 1504, 1520(d), 1313(r) and the PSC rule
Estimate potential freight billing overcharges using Tompkins Ventures industry benchmarks. 3–10% of freight spend is typically recoverable via professional audit.
Tompkins Ventures, July 2026
Estimate how much of your import duties you could recover. 99% of eligible duties per 19 U.S.C. §1313. Section 301 (China) eligible; Section 232 generally excluded.
19 U.S.C. §1313; CSMS #18-000419
Estimate your IEEPA tariff refund and check whether your entries are within the CAPE (≤80 days) or protest (81–180 days) window.
CSMS #68340863; 19 U.S.C. §1514
Interactive duty calculation with the full tariff stack — MFN base, Section 301, Section 232, Section 122, and Chapter 99 — free to use on the site.
GingerControl product, free interactive version
Daily digests of tariff and trade-policy changes, grounded in the primary documents they cover. Free to read.
GingerControl product, free
GingerControl builds AI software for trade compliance — HTS classification, tariff monitoring, and duty recovery. We are not a customs broker or surety, so unlike most free calculators in this space, these tools have nothing to sell you at the end of the math: no bond quote, no filing engagement. Every formula is ported from the named government source and re-verified before we stamp it, the same accuracy bar we apply to our reference guides. If a calculation matters to a live entry, confirm it with your broker — and if you want the monitoring these one-shot tools can't do, that's what our products are for.
For general reference only. See compliance disclaimer.
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