eBay tells you what you sold.
We tell you what you kept.
ArbiKey prices every listing before you buy it and tracks every euro after you sell it — eBay fees, shipping, VAT and live exchange rates included. So the profit on your screen is the profit in your bank.
Free plan · 30 products · Yours forever
A $67 hole, hiding behind a $52 profit.
This is the listing that quietly eats your month.
Sold is not the same as made.
Between the price on your listing and the money in your account, three things quietly take a cut. Most resellers only ever measure the first one.
eBay's cut
Final value fee, plus a fixed charge per order, plus whatever you spend on promoted listings. It comes off the top, before you see a cent.
The quiet middle
Shipping, packaging, VAT, returns and refunds. Individually small. Collectively, the difference between a good month and a flat one.
The rate you forgot
You buy in one currency and get paid in another. The exchange rate moved between listing and payout — and nobody told you.
Most resellers price on instinct. Instinct is very good at spotting a deal, and very bad at compound percentages.
ArbiKey does the second part.Five tools. One number that matters.
Everything is built around a single question: what did this actually make me?
The morning number
Net profit, ROI, category performance and monthly trend, on one screen. Not revenue — profit. You know where you stand before your coffee is cold.
- Net profit, ROI and margin as headline KPIs
- Category breakdown — see which niches actually pay
- Set a monthly profit target and watch it fill
Every sale, honestly
Each order recorded with its true profit — fee, shipping, tax, supply cost, all deducted. Returns and refunds land here too, so a bad week can't hide inside a good month.
- Real profit per order, not gross sale price
- Returns and refunds reduce the number, as they should
- PDF invoices and CSV export for your accountant
Your catalogue, ranked by truth
Supply cost, eBay price, margin and stock for every item, across every store. The winners rise. The quiet losers stop hiding.
- Margin colour-coded per product — spot a loser instantly
- Price history, so you see when a supplier crept up on you
- Tested at 9,000+ products without breaking a sweat
04 — Calculator
The ledger from the top of this page, as a tool. Enter a source cost and a target margin; it hands you the price you need to list at. Or tells you to walk away.
05 — Stores
Run more than one eBay account? Keep them apart. Separate catalogues, separate books, one login — and a combined view when you want the whole picture.
Four steps. Then the guessing stops.
Source
Drop in the Amazon cost — or import your whole catalogue from a CSV.
Calculate
Fees, shipping, VAT and today's exchange rate applied. Break-even, before you buy.
List
Price to a margin you chose, not a number that felt about right.
Track
Every sale, return and expense logged. The month adds up on its own.
Less than eBay takes on one sale.
Start free. Solo is $9.99 a month; Seller, where most sellers land, is $22.99. eBay's fee on a single order is about the same — the difference is that we tell you about it.
Frequently asked
Find out what you're actually making.
It takes two minutes and costs nothing. Worst case, you learn your margins are fine.
Start free — no card30 products · 1 store · Free forever · Export your data any time
Built for the seller who reads the fine print.
ArbiKey is not a listing tool and it will not find you products. It does one thing: it tells you the truth about the money, before and after every sale.
Profit, not revenue
Revenue is a vanity number. The dashboard leads with net profit, average ROI and margin, then breaks the month down by category so you can see which niche is carrying you and which one is a hobby.
- Net profit, ROI, margin and order count
- Category donut and month-over-month trend
- Monthly profit goal with a progress bar you'll actually check
Answer the question before you buy
Source cost in, target margin in, list price out. Every eBay fee, your shipping, VAT and today's ECB exchange rate are applied automatically — so the number it gives you is the number that survives contact with reality.
- Break-even price and target-margin price, side by side
- Live currency conversion — cross-border maths handled
- Saves your calculation history so you can revisit a decision
The month that adds itself up
Log a sale in a few seconds. Supply cost, fees and shipping come along for the ride, so the profit figure is final, not provisional. Returns knock it back down — because pretending they don't is how people convince themselves they're winning.
- Searchable order history, fast at thousands of rows
- Returns and refunds tracked against the original sale
- PDF invoices and CSV export, ready for your accountant
Boring where it counts.
You are trusting this thing with your business numbers. Here is what that's built on.
Row-level security
Your data is isolated at the database level, not just in the interface. Another account cannot read your rows even if something upstream goes wrong.
Tamper-proof audit log
Every insert, update and delete is written to an append-only log with the fields that changed. Nobody — including us — can quietly rewrite your history.
Encrypted backups
On Solo and above, your catalogue and sales can be backed up encrypted, and restored if you ever need to roll something back.
See it against your own numbers.
Import a CSV, or add ten products by hand. You'll know within an hour whether this is for you.
Start free — no cardKnow what you made — for less than one eBay fee.
Seller is $19.17 a month, billed yearly. eBay takes about that from a single order, every time, without asking. We're the only line on this list that pays you back — and you can start free.
One listing you don't buy pays for the year.
The item at the top of this page loses $15.23. Sell twenty of them and you've handed away $304 while feeling like you had a good month.
Seller costs $229.99 a year. Catching that one listing — once — covers it with change to spare. Everything after that is yours.
We don't do free trials.
No 14-day countdown, no card up front, no email at day 11 telling you time is running out. The Free plan is genuinely free, for as long as you want it. Use it until 30 products stops being enough — and if that day never comes, keep it. We'd rather you upgrade because you outgrew us than because a timer went off.
Everything, compared
| Free | Solo | Seller | Scale | |
|---|---|---|---|---|
| Monthly price | $0 | $9.99 | $22.99 | $54.99 |
| Yearly price | $0 | $99.99 | $229.99 | $549.99 |
| Stores | 1 | 1 | 3 | Unlimited |
| Products | 30 | 150 | 600 | Unlimited |
| True-profit calculator | ✓ | ✓ | ✓ | ✓ |
| Sales & return tracking | ✓ | ✓ | ✓ | ✓ |
| Live ECB exchange rates | ✓ | ✓ | ✓ | ✓ |
| CSV import / export | — | ✓ | ✓ | ✓ |
| Price history & analysis | — | ✓ | ✓ | ✓ |
| Encrypted backups | — | ✓ | ✓ | ✓ |
| Expense tracking | — | — | ✓ | ✓ |
| PDF reports & invoices | — | — | ✓ | ✓ |
| Advanced analytics — ROI heatmap, trends | — | — | — | ✓ |
| Priority support | — | — | — | ✓ |
| 30-day money back | ✓ | ✓ | ✓ | ✓ |
| Cancel any time | ✓ | ✓ | ✓ | ✓ |
The awkward questions
Start on Free. Upgrade when it hurts.
Not before. We'll wait.
Create your free accountNo card. No trial clock. Export your data whenever you like.
eBay fee & profit calculator.
Type in what you paid and what you'll sell it for. We'll show you exactly what eBay takes and what actually lands in your account — the same engine that runs inside ArbiKey.
Fees follow eBay's published rates. Adjust any field — everything recalculates instantly.
This is one listing. What about the other 200?
ArbiKey runs this math on your whole catalogue, tracks every sale, and tells you what you actually kept — in your own currency.
How to Use This eBay Profit Calculator
This free eBay profit calculator is designed for Amazon to eBay arbitrage sellers who need accurate profit figures before listing — and honest numbers after selling. Here's how to get the most out of it:
- Select your marketplace — choose eBay US, UK, DE, CA or AU. Currency and fee rates update automatically.
- Select your category — eBay final value fees vary by category. Most categories sit at 13.25%, but Jewellery (15.55%) and Books (14.95%) are higher. Choose the closest match.
- Enter your Amazon cost — the price you paid or will pay to source the item.
- Enter your eBay selling price — what you plan to list at, or what it actually sold for.
- Add shipping — your actual postage and packaging cost, not what the buyer pays.
- Add promoted listing % — if you use eBay promoted listings, enter your ad rate (typically 2–12%). This gets deducted from your net.
The calculator shows your real net profit — not gross margin, not sale price, but what actually lands in your account after every deduction.
eBay Fee Breakdown for Amazon to eBay Arbitrage Sellers (2026)
Most arbitrage sellers underestimate how much eBay actually takes. Here's every fee you need to account for when calculating your Amazon to eBay profit margin:
| Fee type | Rate | Applied to | Impact |
|---|---|---|---|
| Final Value Fee (FVF) | 9%–15.55% | Total sale amount incl. shipping | Biggest cost — always check your category rate |
| Fixed order fee | $0.30 per order | Every transaction | Matters on low-value items |
| International fee | 1.65% | Sales to international buyers | Easy to forget, adds up fast |
| Promoted listings | 2%–12% | Sale amount, only when item sells | Optional but common — factor it in |
| Payment processing | Included in FVF | Managed payments (since 2021) | No separate PayPal fee anymore |
| Exchange rate spread | 1%–3% | Cross-currency payouts | Often invisible until you check your bank |
⚠️ Critical: eBay's final value fee applies to the total transaction value — including what the buyer pays for shipping. If you charge £4 postage, eBay takes 13.25% of that too.
What Is Amazon to eBay Arbitrage?
Amazon to eBay arbitrage is a reselling model where you source products on Amazon and sell them at a higher price on eBay, keeping the difference as profit after fees. Also called retail arbitrage or online arbitrage, it works because prices for the same item can vary significantly between platforms at any given time.
A successful Amazon to eBay arbitrage operation typically involves three things:
Product research
Finding items where eBay prices exceed Amazon prices by enough to cover all fees and still deliver a target margin — typically 15–25%.
Accurate fee calculation
Calculating real net profit after eBay final value fees, shipping, VAT, promoted listings and exchange rates — before you buy, not after.
Profit tracking
Recording actual sale results against your projections, so you know which products and categories are genuinely profitable at scale.
What Is a Good Profit Margin for eBay Arbitrage?
Target margins vary by seller and product type, but here's a practical benchmark used by experienced Amazon to eBay arbitrage sellers:
| Margin | Verdict | Risk level | Notes |
|---|---|---|---|
| Below 10% | ❌ Skip it | High | One price change or return wipes your profit |
| 10%–15% | ⚠️ Marginal | Medium | Only works at high volume with stable products |
| 15%–25% | ✅ Good | Low–Medium | Sweet spot for most Amazon to eBay arbitrage sellers |
| 25%–40% | ✅ Strong | Low | Usually niche products with less competition |
| 40%+ | 🚀 Exceptional | Very low | Rare — check your numbers, then buy everything you can |
Remember: these margins should be calculated on net profit — after every fee, not on the gross difference between Amazon and eBay prices. Many sellers think they're at 20% margin and are actually at 5%.
Frequently Asked Questions
Is Amazon to eBay arbitrage still profitable in 2026?
Yes — but margins are tighter than they were five years ago. Competition has increased and eBay's fee structure has become more complex with managed payments. Sellers who use accurate fee calculators and track real net profit consistently outperform those who estimate. The model still works well for sellers targeting 15–25% net margins on well-researched products.
Does eBay charge fees on shipping?
Yes. eBay's final value fee applies to the total transaction amount — item price plus whatever the buyer pays for shipping. This catches many sellers off guard. If your item sells for £30 and you charge £4 shipping, eBay takes 13.25% of £34, not £30. Our calculator accounts for this automatically.
What eBay categories have the lowest fees?
Heavy Equipment and certain Business & Industrial categories carry lower rates (around 3%). Most consumer categories sit between 12.9% and 13.25%. Jewellery & Watches and Books & Media are among the highest at 15.55% and 14.95% respectively. Always check the current rate for your specific category before listing.
How does the exchange rate affect my eBay profit?
If you source from Amazon US and sell on eBay UK (or vice versa), the exchange rate at payout can be 1–3% different from when you listed. Over hundreds of transactions this adds up significantly. This calculator uses live ECB rates so your cross-border calculations reflect what you'll actually receive, not a rate that was accurate last week.
What's the difference between margin and ROI in eBay selling?
Margin is your net profit as a percentage of the sale price. ROI (return on investment) is your net profit as a percentage of what you paid for the item. Example: buy for £20, sell for £30, net profit £5. Margin = 5/30 = 16.7%. ROI = 5/20 = 25%. Both matter — ROI tells you how efficiently you're using your capital.
Do I need to create an account to use this calculator?
No. This calculator is completely free with no signup required. For sellers who want to track their full catalogue, save calculations, monitor price history and see sales analytics across multiple stores, ArbiKey offers a free plan for up to 30 products — also with no card required.
Track Your Whole Catalogue, Not Just One Listing
This calculator gives you the answer for one product. ArbiKey runs the same calculation across your entire inventory, tracks every sale, and tells you your real monthly profit — across every store, in your own currency.
Everything you were going to email us.
Privacy Policy
Last updated: 19 July 2026
ArbiKey ("we", "us") provides profit-calculation and inventory-tracking software for online resellers. This policy explains what we collect, why, and what you can do about it. If anything here is unclear, write to privacy@arbikey.com and we will explain it in plain language.
What we collect
- Account data. Your email address, and a securely hashed password. If you sign in with Google, we receive your email address and basic profile information from Google.
- Business data. Everything you enter into the product: products, supply costs, sale prices, sales, returns, expenses and stores.
- Billing data. Handled entirely by Paddle, our merchant of record. We never see or store your card number.
- Technical data. IP address, browser and device type, and error logs, used to keep the service running and secure.
What we do with it
We use your data to run the service, calculate your figures, enforce your plan limits, prevent abuse, and contact you about your account. We do not sell your data, and we do not share it with advertisers.
Marketplace connections
If you choose to connect an eBay account, we request read-only permission to retrieve your orders and listings. We store only what is needed to show you your own figures. You can disconnect at any time from your account settings, and we will delete the associated tokens and marketplace records. We honour eBay's account-closure notifications and delete the corresponding data when we receive one.
Where it lives
Your data is stored with Supabase on servers inside the European Union, protected by row-level security so that your rows are readable only by your account. Changes are written to an append-only audit log.
Your rights
Under the GDPR you may request a copy of your data, correct it, or have it deleted. You can export everything to CSV yourself from inside the product at any time. To delete your account entirely, email privacy@arbikey.com and we will remove your data within 30 days.
Cookies
We use essential cookies only — the ones needed to keep you signed in and to keep the service secure. We do not run advertising or tracking cookies.
Changes
If we change this policy in a way that affects you, we will tell you by email before it takes effect.
Terms of Service
Last updated: 19 July 2026
The service
ArbiKey provides profit-calculation and inventory-tracking tools for online resellers, on a subscription basis with Free, Solo, Seller and Scale tiers. By creating an account you agree to these terms.
Your account
You are responsible for keeping your login credentials secure and for everything that happens under your account. You must be at least 18 years old, or the age of majority where you live. One person or business per account.
What you may not do
- Resell, sublicense or white-label the service without our written agreement.
- Attempt to break, probe or overload our systems, or bypass plan limits.
- Use the service to break the law, or to breach the terms of any marketplace you connect.
Billing
Paid plans are billed in advance, monthly or yearly, through Paddle, who act as merchant of record. Subscriptions renew automatically until cancelled. You can cancel at any time and will keep access until the end of the period you have already paid for.
Your data
Your business data is yours. We claim no ownership of it. You can export it at any time. If you close your account, we delete it in line with our Privacy Policy.
Availability
We work hard to keep ArbiKey running, but we do not promise uninterrupted service. We may take the service down for maintenance, and we will try to do that at quiet hours.
Liability
ArbiKey is a tool, not an accountant and not financial advice. Figures depend on the data you enter and on third-party rates and fees. You remain responsible for your own business decisions. To the extent permitted by law, our total liability is limited to what you paid us in the twelve months before the claim.
Changes
We may update these terms. If a change materially affects you, we will give you notice by email before it applies.
Refund Policy
Last updated: 19 July 2026
The short version
If ArbiKey isn't what you expected, email us within 30 days of your first payment and we will refund it. No form, no interrogation. One sentence is enough.
The longer version
The Free plan exists precisely so that you can judge the product without paying. Because of that, we ask you to try it before upgrading — but if you paid, used it, and it still wasn't right, the 30-day refund stands on your first payment for a plan.
Renewals
Renewal payments are not automatically refundable, because you have had the service for the whole period. You can cancel any time before a renewal to avoid the next charge, and you will keep access until the end of the period you already paid for.
How to request one
Email billing@arbikey.com from the address on your account. Refunds are processed by Paddle and normally reach your card within 5–10 business days.
Statutory rights
If you are a consumer in the EU or UK, this policy does not affect your statutory cancellation rights.