Two of the USPS price changes we've covered this year share the same expiration date: the temporary 8% "Transportation-Related, Time-Limited Price Change" that's been running since April 26, 2026, and the 6% peak season surcharge layered on top of it since October 4. Both are filed to end January 17, 2027. What USPS has confirmed comes next isn't a return to flat rates — it's a new, permanent Fuel Surcharge that recalculates every week, built the way UPS and FedEx have priced fuel for years but USPS never has.
What USPS has actually confirmed
USPS's own Fuel Surcharge FAQ, published on its PostalPro site, describes a charge on "all competitively priced packages," calculated as a percentage of the base postage, that resets weekly using diesel and jet fuel prices published on the US Energy Information Administration's site. The diesel- based percentage is posted 3 to 5 days before it takes effect each week; the jet-fuel-based percentage, 3 to 4 days before. "Competitively priced" is USPS's term for the same four services the two expiring surcharges already touch — Priority Mail Express, Priority Mail, USPS Ground Advantage, and Parcel Select — not the market-dominant products like First-Class Mail.
The one class this still skips
Media Mail isn't a competitive product, so by the same logic that's kept it out of this year's 8% and 6% surcharges, it's not on the list for the new weekly one either. If a box qualifies for Media Mail, it's still the one shipping class in a reseller's toolkit that USPS hasn't touched with any fuel-related charge this year or next — First-Class Mail is the other, though most resellers' packages are too heavy or too large for that class to apply.
What's confirmed to start in January, and what isn't
USPS has not published a starting percentage, a cap, or a floor for the new charge — only the mechanism and the index it runs off of. That's a meaningfully different situation from the 8% and 6% numbers above, which were filed with the Postal Regulatory Commission as specific figures before they took effect. Here, the formula is public and the number isn't, which means nobody can calculate what a label will cost under the new system until USPS starts actually publishing the weekly percentage.
It's also not yet clear whether this fuel surcharge arrives instead of the current 8% and 6% charges once they expire on January 17, or on top of whatever the next annual rate change turns out to be. Coverage of the rollout doesn't agree on that point, and USPS's FAQ doesn't settle it either. Don't assume either direction — confirm it against your actual label cost once USPS starts publishing weekly figures in January, rather than estimating now.
Why USPS is doing this at all
UPS and FedEx have run fuel surcharges that move with oil prices for years — index-based, adjusted on their own schedule, separate from the base rate card. USPS has never had an equivalent; its surcharges this year (the 8% and the 6%) were still flat, filed figures that didn't move once set. A weekly, index-linked charge is a structurally different kind of fee: it can go up without a new PRC filing, and it can also go down if fuel prices fall, which neither of 2026's flat surcharges could do once they were locked in. For a reseller, the practical effect is that "check the current rate" stops being a once-a-quarter task and becomes something closer to what commercial shippers who negotiate with UPS and FedEx already have to track weekly.
What to actually do
- Don't price against a guessed percentage. USPS hasn't published one,
- and anything you see online before USPS's own weekly figures start
- posting in January is a guess, including any specific number in an
- article covering this rollout.
- Keep leaning on Media Mail where it qualifies. It's skipped every
- USPS fuel-related charge in 2026 and is confirmed to skip this one too.
- **Don't assume the 8% and 6% surcharges simply "end" on January 17 with
- nothing replacing them.** Something does replace them — just not
- something with a known cost yet.
- **Recheck your actual label cost directly against USPS or your label
- platform once the weekly percentage starts posting**, rather than against
- this post or any other secondary source, before relying on a number for
- pricing.
PalmFlow doesn't sell postage or quote carrier rates — there's no carrier integration, and a weekly-resetting fee isn't something a static calculator could track anyway. What it does track is the shipping cost you actually paid against the sale, so when USPS's new charge starts showing up on labels in January, it lands in your real per-item margin the same week, not as a line you have to go hunting for later. Free plan, 50 active items, no card required.
Disclaimer: this is general information, not shipping or financial advice. USPS's fuel surcharge, its starting rate, and how it interacts with other 2026 price changes are all still unsettled as of this writing — confirm current terms directly with USPS or the Postal Regulatory Commission before relying on any figure here for a pricing decision.