That's one Shopify shop, twelve months, 581 times a carrier re-measured a box and re-rated a label that was already paid for. Shopify posts the charge to the bill and sends nothing. Adjustmunk watches your order timeline, emails you the day it happens, and adds up every charge it can still see — as far back as Shopify lets us read, up to a year.
No email, no notification, no line in any report. The charge lands on your bill and waits for you to find it.
Every re-rate a carrier makes is written to the order timeline in your Shopify admin — one order at a time, where nobody would ever go looking. Adjustmunk reads them all and adds them up, going back as far as Shopify will let it.
A new adjustment above your threshold emails you immediately. Everything smaller rolls into a daily digest, and a weekly summary always arrives. Set the threshold once; change it whenever.
Not just "you were charged $45.96" — which surcharge caught you, what the threshold was, and how far over you went. Then it shows you the box that keeps doing it to you.
Shopify posts these to your bill silently. Adjustmunk emails you — same day, with the order, the amount, and the reason.
Adjustmunk maps the carrier's measured dimensions onto the 2026 UPS, FedEx and USPS surcharge tables and names the rule — Additional Handling by length, large-package, a dimensional-weight re-rate, a minimum billable weight you didn't know applied. Then it tells you the margin: one inch over, or a hundred cubic inches under.
Totals by month, by carrier, and as a share of what you spent on labels. One shop found 83% of its label spend was adjustments.
Grouped by the carton you declared and what the carrier measured. That's how you learn one preset caused 235 charges and $10,108.
No carrier account, no UPS or FedEx login, no theme edits. Adjustmunk reads your orders and nothing else.
Carriers occasionally re-rate in your favour. Those are credits, and Adjustmunk nets them against the charges instead of quietly inflating the number that makes the app look useful.
Not a trial. There is no paid tier to graduate to.
Everything Adjustmunk does, for every shop, with no card.
Adjustmunk is how small shops meet the munks family. The apps we charge for are elsewhere.
The numbers here are from Broomfitters, our own shop: $20,288 across 581 charges in twelve months, against $24,311 spent on 3,226 labels. Detected from order timeline events, not reconciled to a Shopify bill.
You buy a label at one price. The parcel goes through the carrier's automated measuring tunnel, which disagrees with the dimensions or weight you declared, and the carrier re-rates the shipment days or weeks later. Shopify pays the difference and passes it to you. The typical gap between the order and the charge is about two weeks, and some arrive months afterward.
One at a time, if you know to look. Each adjustment is written to that order's timeline, and the charge appears on your bill. There is no notification, no cross-order report, and Shopify's own shipping reports explicitly exclude adjustments. Nothing in the admin will ever tell you the annual total.
No. Adjustmunk needs read access to your orders and nothing else — no carrier login, no invoice upload, no theme changes. That's also why it works for shops buying labels through Shopify Shipping, who the traditional parcel-audit vendors can't help.
As far back as Shopify lets us read, up to a year — Shopify keeps timeline events for twelve months, and reading orders older than sixty days needs a permission Shopify grants app by app. Whatever the window turns out to be on your shop, Adjustmunk starts counting from the day you install and keeps its own record from then on.
Really free, and the whole app. Adjustmunk exists so small shops meet the munks family; the apps we charge for are different apps. There is no order cap, no history gate, and no upgrade button hiding the number that matters.
Two things, and the second matters more. You can raise it with Shopify Support, and Adjustmunk gives you the details to do that. But arguing one parcel rarely works, because carrier terms let them bill on the dimensions they measure. What does work is changing the packaging: knowing that one carton is an inch over a threshold on every single shipment is worth more than any single charge.
Drop your email and we'll tell you the day it's live on the Shopify App Store. Free forever — not a trial.
Part of the *munks family