Calculator · sample rates, editable · 2026-11-08
Agent fee calculator: how service charges work out on your basket
Two agents can quote the same item at the same price and still leave you with different bills, because the service charge is not one number. It might be a percentage of the item price, a flat charge per order, a flat charge per item, a separate fee for quality check photos, or a surcharge on certain payment methods. This calculator models those shapes on your own basket so you can see where a fee structure stops being cheap. It ships with blank fields and two clearly labelled illustrative presets, because we do not publish fee percentages and we have no verified figures for any platform.
Fill the fields and the result appears here.
How the number is built
No published rates are embedded. The fields ship blank and take whatever numbers you enter. Our two presets are labelled as invented illustrations of fee shapes, not as quotes: illustrative preset A is a percentage of item price applied to the goods, and illustrative preset B is a flat charge per order. The arithmetic is Total fee = (item price x quantity x percent fee) + flat per order + (flat per item x quantity) + QC fee + extra photo fee + (storage overage days x daily rate) + (basket value x payment surcharge), and Fee share = total fee / (item price x quantity). Any number you see that we did not derive from your input is an editable sample, and none of it comes from oopbuy.com, spreadsheetkakobuy2027.com, or any other platform. Every figure is an estimate you built with your own numbers, not a checkout price or a commitment from any provider.
What each field is asking for
- Item price, with a currency selector, and quantity, since per-item fees scale with units while per-order fees do not.
- Fee shape 1: percentage of item price. Enter the number from the provider own fee page, or leave it at zero.
- Fee shape 2: flat charge per order, in USD. Useful for agents that charge a single service fee per purchase.
- Fee shape 3: flat charge per item, in USD. This is the shape that punishes large baskets.
- Quality check fee, either per order or per item, if photos are billed separately rather than bundled into the service fee.
- Extra photo fee, per additional photo request beyond the standard bundle, if the provider charges one.
- Storage overage: days beyond any free storage window, and a per day rate. Public information shows a 90 day free storage window on one large agent, but the terms differ provider by provider, so the field is blank.
- Payment surcharge percentage for card or buy-now-pay-later funding, and a domestic shipping amount if the seller charges to reach the warehouse.
What you get back
The total service cost for your basket, in money and as a percentage of item price, with each fee shape shown as its own line so you can see which one dominates. A crossover line reports the basket value at which switching from the flat shape to the percentage shape becomes cheaper or more expensive, which is the practical answer most buyers are looking for. Every figure is a comparison you built with your own numbers, not a price list.
The method
Why the arithmetic works this way
If you understand the mechanics you can sanity-check any quote, including ours.
Why we refuse to print fee percentages
You will find pages that state an agent charges a specific percentage as if it were a constant. We are not going to do that. Service fees change, they differ by account level, they get promoted and cancelled, and a percentage that was right last year can be badly wrong now. We have no verified fee figure for any platform and we will not invent one, so this calculator asks you for the number instead. Take it from the provider own fee page on the day you are buying. One input from the source beats ten confident figures from aggregator sites, and it takes about thirty seconds to find.
Flat versus percentage, and where the crossover sits
The two shapes behave oppositely. A percentage fee grows with your basket, so it is cheap on a small order and expensive on a large one. A flat per-order fee stays constant, so it is punishing on a single cheap item and nearly free when spread across ten items. The crossover is simple arithmetic once you have both numbers: divide the flat fee by the percentage to get the basket value at which they cost the same. Below it the percentage is cheaper, above it the flat fee wins. If you buy in large baskets, structure matters more than the headline size of a fee, and this is the one number on the page worth writing down.
The fees that do not look like fees
Some of the real cost hides outside the service charge line. Payment surcharges for card funding, storage overage after a free window closes, per-item packaging fees, domestic shipping that was not included in the listed price, and charges for return handling all land on the same bill. Public information from one major agent shows a 90 day free storage window and photo bundles included, but terms differ by provider and by account level, and we cannot verify them for anyone else. Before you compare two agents on a single percentage, put every one of these lines into the calculator for both. The winner frequently changes once the hidden lines are visible.
What we still cannot tell you
We cannot see your account level, and some platforms give members lower fees or extra free services, so the same basket can cost two people differently. We cannot know which payment method you will use, which is what makes a surcharge apply. We cannot verify how long the free storage window is for your provider as of today, which is why the overage field starts blank rather than filled with the ninety day figure we saw published elsewhere. And we cannot promise the fee you enter today will be the fee charged next month. Re-run the numbers against the live fee page before each purchase instead of trusting a saved preset.
Worked example
Numbers you can check against the form
Run one of these rows through the fields above and the output should match.
| Goods (CNY) | 3% | 5% | 8% | 10% |
|---|---|---|---|---|
| ¥200 | ¥6 | ¥10 | ¥16 | ¥20 |
| ¥600 | ¥18 | ¥30 | ¥48 | ¥60 |
| ¥1500 | ¥45 | ¥75 | ¥120 | ¥150 |
Common questions
Questions about this calculator
Do you get paid by the agents you compare?
We earn a commission through outbound links, and we do not publish any commission percentage because we have no verified figures. That payment does not change the inputs you type here, and the calculator has no built-in preference for any provider.
Is a percentage fee always worse for buyers?
No. On a single cheap item a percentage is often smaller in absolute terms than a flat charge. The crossover line tells you the basket value where the two swap places, so the honest answer is that it depends on what you are buying.
Where do I find the real fee for my provider?
On the provider own fee or pricing page, or in their help centre, read on the day you order. Take a screenshot for your own records, because terms change and having the version you relied on is useful if a charge is disputed.
Related searches
- agent fee calculator
- service fee comparison
- agent service charge
- quality check fee
- shopping agent cost
- oopbuy shipping calculator
- oopbuy spreadsheet
- oopbuy spreadsheets
Now put a real row through it
The calculator tells you what a parcel costs. The catalogue tells you what goes in it.
- 1,711 rows in the current snapshot
- Both currencies on every row
- Filter by brand or category before you commit
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