You quoted a parcel last month and remembered the number. You quote a similar parcel now, same line, same destination, and it has moved. Nobody changed the rules on you and the agent is not doing anything to you personally.
The mistake is in the word rate. A shipping line in an agent's checkout looks like a published tariff, the way a stamp has a price. It is closer to an airline seat: a spot price on a market that reprices constantly, wrapped in a label the agent chose.
Nobody in this chain owns an aircraft
Your agent is not the carrier. It buys capacity from freight forwarders, who buy from consolidators or carriers, who sell space that varies in supply every week. What you see as "line X" is the end of a resale chain, and every layer in it reprices on its own schedule.
That is the whole reason the number moves. Everything below is just a list of things that move it.
What actually moves it
- Capacity out of China. A large share of air freight travels as belly cargo on passenger aircraft. Schedules change seasonally, routes get added and cut, and when the space available on a lane shrinks, the price of the same kilo on that lane rises without anything about your parcel changing.
- Demand waves. The run-up to a national holiday, the backlog after it, the Chinese sales peaks and the Western fourth-quarter rush all put more boxes into the same space. The holidays that stall an order is the calendar version of this.
- Fuel and currency. Fuel surcharges are a moving component of freight pricing everywhere. Underlying rates are also struck in yuan or dollars and shown to you in your own currency, so a quote can move while the freight cost has not.
- Route-level events. A line stops serving a destination, or stops accepting a category of goods, or its handover partner in your country changes. The name in the dropdown stays the same; the product behind it does not.
- Lines being relabelled. Those names are the agent's labels, not international standards. A line can be withdrawn and its traffic quietly moved to another arrangement under a similar name, which reads to you as "the same line got more expensive".
- Introductory pricing. New lines and new agent partnerships often launch cheap. A price you remember fondly may have been a promotion.
- Your parcel is not the same parcel. This is the most common one by far. A different repack, a different scale, a box a centimetre wider, or a weight that crosses a rounding boundary all change the chargeable figure — which is a different mechanism from the market moving, and it is covered in how rep shipping is priced.
Distinguishing the two kinds of change
Before concluding that rates went up, check whether your own box changed. This takes a minute in the quote screen.
Compare the chargeable weight, not the price. If the chargeable weight is the same as last time and the price is different, you are looking at the market. If the chargeable weight moved, you are looking at your parcel, and the quote came back double is the page that triages that.
Also check whether the same line is selected, and whether tax-prepaid options are ticked. A line that includes import charges and a line that does not are different products with different totals, and the dropdown does not always reopen where you left it.
Why no price you read in a thread is usable
Every shipping figure posted on Reddit is a quote for one parcel, one route, one destination country, one week, and usually one agent. It is not wrong, it is just not transferable.
Our own record makes the point by being nearly empty. Of the 237 quoted comments this site holds across 124 sellers, thirteen mention shipping, freight, a parcel or a courier at all. Three of those attach a currency figure to it. No two of the three describe the same route, the same agent or the same kind of goods, and all three are already quoted on other pages here, which is what a corpus with nothing to say about freight prices looks like.
So this site publishes no rate card, no per-kilo figure and no volumetric divisor. Not out of caution — out of not having measured any of it. Our method page is explicit about where our evidence starts and stops.
What to do about it
- Quote on the day you intend to ship, not weeks ahead. A quote you are carrying around in your head is stale, and the parcel is priced when you submit it.
- Re-quote every line, every time. It costs nothing, the relative order of the lines changes, and the cheapest one last month is not automatically the cheapest one now.
- Do not sit on a packed parcel waiting for rates to fall. You cannot forecast this market, and the storage clock charges you for trying. That trade-off is when to consolidate and when to ship.
- Compare agents in the same week or not at all. A rate difference measured a month apart is a measurement of the calendar, not of the agents.
- Read the total, not the freight line. Tax-prepaid options, insurance and handling all sit next to it, and the number that matters is what leaves your account. What happens afterwards at your border is separate again, and thresholds move — check your own customs authority, and customs and duties on a rep parcel for the mechanism.
The version of this that is genuinely bad news
Sometimes a line does not get more expensive, it disappears. A route closes to your country, or a category stops being accepted, and the cheap option you had planned around is simply not in the list any more.
There is no remedy for that except the ordinary ones: pick from what is offered today, run the numbers on the parcel you actually have, and keep the haul small enough that a worse line is an annoyance rather than a disaster. If you are still assembling an order, how to buy reps has the sequence, and the decoder will rebuild a buy link that stopped working while you were deciding.