MPF and HMF Fees Explained – 0.3464%, Min/Max, When Each Applies
MPF is 0.3464% of customs value, min $33.58, max $651.50. HMF is 0.125% ocean only. 2026 rates, exemptions, and consolidation strategy.
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Pirate Ship vs ShipStation vs Shippo – Full 2026 Comparison
Pirate Ship vs ShipStation vs Shippo 2026 comparison: monthly pricing, per-label fees, USPS Cubic access, carrier discounts, and which software fits your volume.
Section 321 De Minimis $800 – How It Works, Who Qualifies
Section 321 de minimis $800 suspended in 2026. What changed, who qualifies, shipment costs now, and what sellers who relied on it must do.
UPS vs FedEx Ground – Rates Speed DIM Who Wins
UPS vs FedEx Ground 2026: same 5.9% increase, same DIM divisor 139. Differences are surcharges, speed, economy tiers, and negotiated rates
UPS vs USPS – E-commerce Seller Guide
UPS vs USPS: USPS wins under 2 lbs and all residential deliveries. UPS wins above 10 lbs commercial. July 12 shifts the comparison.
Cheapest Way to Ship Small Packages in 2026 (Compared)
Cheapest carrier for small packages in 2026 by weight and zone. USPS wins under 1 lb. USPS Cubic beats all for dense packages
FBA Referral Fees by Category – Full Table
Amazon referral fees by category in 2026: 8% to 45% full table, tiered rates explained, minimum fee impact, and how category choice affects your margin floor.
FBA Small Standard vs Large Standard – Size Tier Thresholds
FBA size tiers 2026: small standard vs large standard thresholds, fee differences, new Small Bulky tier, and how the right tier protects your margin.
How to Qualify for USPS Cubic: Rules & Limits
USPS Cubic eligibility 2026: 22 inch max, 20 lb max, volume limits, commercial rate access, and the July 12 dimension compliance rule explained.
USPS Cubic Tier Pricing – Full Rate Table
USPS Cubic tier pricing: 5 Priority Mail tiers and 10 Ground Advantage tiers with rates by zone, box dimension examples, and tier breakpoint optimization.
Ground Advantage vs Cubic: When Each Is Cheaper (2026)
USPS Ground Advantage vs Ground Advantage Cubic: decision rules, rate comparison table, size limits, and exact cost breakdowns by zone.
USPS Flat Rate Box Sizes 2026: Dimensions & Prices
USPS Flat Rate box sizes and 2026 prices: Small $11.20, Medium $19.60, Large $28.70 commercial. DIM exempt, nonstandard fee exempt. When flat rate wins and when it loses.
USPS Ground Advantage Rates 2026 – Zone Chart & Weight Breaks
USPS Ground Advantage commercial rates by zone and weight. Notice 123 tables effective July 12, 2026.
Amazon FBA Fees 2026: Every Fee, With Real Numbers
Every Amazon FBA fee in 2026: referral, fulfillment, storage, placement, fuel surcharge. Check your true margin before ordering inventory.
DIM Weight Divisors by Carrier 2026 (Full Table)
USPS Ground Advantage and Priority Mail DIM use divisor 139 when volume exceeds 1,728 in³ (DMM 283 §§1.4.1–1.4.2; DMM 223 §1.4). FedEx states 139 for U.S., Puerto Rico, and international. UPS commercial domestic 139; UPS retail and international cells are not filled without a named current UPS guide section.