How carrier rate increases (GRIs) reach your 3PL invoice

Why carrier GRIs matter on a 3PL bill#

A carrier GRI changes the price of postage, and for most direct-to-consumer (DTC) brands that ship on the 3PL's carrier accounts, postage is the largest share of total 3PL spend, larger than all warehouse fees combined. Small-parcel postage sits on the 3PL's own invoice in about nine in ten of Implentio customers' 3PL contracts, so in those contracts a carrier's price change, once passed on, appears on the 3PL invoice.

The shipping basis, the rule that turns the carrier's charge into your price, sets when the new prices start and how much you pay, so find out which basis each service is on (How 3PLs bill shipping: pass-through, markup or the 3PL's own rate card).

What a carrier GRI changes#

A carrier GRI changes a carrier's published (list, daily, retail or commercial) rates by service, zone and weight, and can change minimum charges, surcharge amounts and delivery-area ZIP code lists on the same date^1,3. Some 3PL contracts also call a 3PL's own annual increase a GRI; see Annual price escalators and CPI clauses.

Carriers also change prices outside the GRI. As of October 2026, UPS and FedEx set fuel as a percentage that changes weekly^8,9, and FedEx adds fees on January 18, 2027 and changes zones for some ZIP code pairs on February 1, 2027¹.

Announced carrier changes as of October 2026#

FedEx's next GRI starts January 4, 2027; UPS's and USPS's latest annual changes started in December 2025 and January 2026.

We found no USPS filing of new prices for January 2027 as of October 21; its two temporary increases end January 17, 2027^6,7. See the Carrier GRI and surcharge tracker, updated each year.

Why your increase differs from the headline#

The headline is an average across services, so your parcels can rise by more or less: one parcel-data firm's analysis of FedEx's 2027 tables, reported in the trade press, found five of seven major services above 5.9%².

A percentage discount carries the change through: in one filed UPS carrier agreement, incentives are "based on and derived from the most recently published UPS list rates", and the shipper pays "the greater of" the discounted charge or a minimum net charge¹⁰. So the same discount off a higher rate is a higher price, and on light, short-zone parcels billed at the minimum, a higher minimum can add more than the base-rate increase². A large shipper's carrier contract can cap the GRI¹⁴. To model your own mix, see Annual general rate increases (GRIs): reading the real impact on your mix.

How a carrier GRI flows through each shipping basis#

A carrier GRI reaches you on the carrier's date when postage is billed at the 3PL's carrier cost or marked up, and on the 3PL's own rates when its card changes.

On pass-through, no new 3PL card is needed: the shipment-level file shows each parcel's new cost, and a sample carrier invoice, or for USPS labels the postage platform's history, confirms it. If the 3PL's carrier contract caps the GRI, your increase can be smaller than the published change.

On cost plus a percentage, the dollar markup grows with the cost while the percentage stays the same (Verifying shipping markup against your contract); on cost plus a fee per label, the fee stays flat unless a clause moves it.

On a 3PL's own rate card, the 3PL decides when and how much of a carrier GRI to pass on. It can change its card on or near the carrier's date, apply its own increase from its own date, sometimes with different dates by carrier or service, or leave rates unchanged until it reprices. The change can arrive as a complete new card or as a short notice. A card defined as a percentage off the carrier's current published table moves when that table moves; a card that lists the 3PL's own dollar prices, even ones first set as "X% off", moves only when the 3PL issues new prices. Fuel and surcharges billed at the carrier's amounts change on the carrier's dates even when base rates don't. Where the card's services don't name the carrier, check changes against the contract's price-change terms.

Services can sit on different bases, so check each (Hybrid approaches by service level or channel); a GRI can also change which carrier the 3PL's rate shopping picks. In two pallet-freight (LTL) carriers' notices, increases apply to rates set under their tariffs^15,16; see Freight (LTL/FTL) billing for B2B orders.

When the new prices start: ship date, invoice date and notice#

New carrier prices follow the ship date in one filed UPS carrier agreement, which bills services under the rate guide "in effect at the time of shipping"¹⁰. A monthly invoice can then mix two years' rates: if FedEx also prices by ship date, shipments dated January 1–3, 2027 bill at 2026 rates and those from January 4 at 2027 rates¹. Check the first invoice covering shipments after each effective date, split by ship date.

On a 3PL's own card, its effective date applies, and the contract should say whether the ship date, billing period or invoice date sets the rate; if it doesn't, get the 3PL's answer in writing. In the invoices we review, rates change more often than brands expect, sometimes one line at a time, and the 3PL's billing system can lag the rate card.

We found no standard notice period for carrier increases. One 3PL's published terms require at least one month's written notice of any charge adjustment, including for "price changes by individual shipping service providers"¹².

What your contract should say about carrier increases#

If your contract is silent on carrier increases, pass-through and cost-plus billing carry them on the carrier's date, and on the 3PL's own card its general price-change terms apply: a change on notice, by review or at renewal. One consultancy calls a "fees subject to change with 30 days' notice" clause unacceptable because it doesn't limit the number of increases¹³. Get these in writing:

• The shipping basis for each service and carrier.
• On pass-through and cost-plus: increases at the 3PL's actual carrier cost (plus any agreed markup) from the carrier's date, decreases passed on too, and documentation on request. One 2005 fulfillment contract filed with the U.S. Securities and Exchange Commission (SEC) has all three, and lets "at cost" include third-party vendors' "administrative fees"¹¹.
• On the 3PL's own card: how much of a carrier GRI passes on, from what date, any cap, and the notice period and form, such as a dated card (Rate locks and price protection).
• An escalator that leaves out shipping lines that already move with carrier GRIs, so one increase isn't counted twice¹².
• What happens if you reject new rates. The 2005 contract lets the client name another carrier source¹¹; one 3PL's terms give 14 days to terminate¹². See Price change and escalation clauses.