MPF and HMF Calculator: Estimate Both CBP Import Fees Together
Calculate Merchandise Processing Fee and Harbor Maintenance Fee together for US import landed-cost planning in 2026.
MPF and HMF often appear on the same ocean import
If you import by ocean and clear a formal customs entry, you may need to estimate both MPF and HMF. The formulas are different, and confusing them creates landed-cost errors.
Use TariffCheck's full import calculator for duty stacking. Use this page to understand the two CBP fee formulas together.
Formula summary
| Fee | Formula | Notes |
|---|---|---|
| MPF | Entered value x 0.3464% | Apply FY 2026 minimum and maximum |
| HMF | Merchandise value x 0.125% | Ocean cargo fee; no MPF-style cap |
Combined example
Assume a formal ocean import with $75,000 entered value.
| Fee | Calculation | Estimate |
|---|---|---|
| MPF | $75,000 x 0.3464% | $259.80 |
| HMF | $75,000 x 0.125% | $93.75 |
| Combined MPF + HMF | - | $353.55 |
The combined CBP fee is not the total landed cost. Add HTS duty, Section 301 if China-origin, freight, bond, broker, and final delivery.
When one fee applies but not the other
- Air shipment: MPF may apply; HMF usually does not.
- Ocean formal entry: MPF and HMF may both apply.
- Informal entry: MPF treatment differs from formal-entry MPF.
Which is larger, MPF or HMF?
MPF is usually larger on formal entries because the percentage rate is higher. HMF matters most on ocean shipments because it scales directly with merchandise value.