How to Calculate True Profit on eBay After Fees

You sold a jacket on eBay for $45 and paid $8 for it at a thrift store. That is not $37 profit. After eBay's final value fee, payment processing fee, shipping costs, and the gas to source it, your real profit might be half that. Here is how to calculate it correctly.

Tax config last verified: 2026-01-10. Mileage rate: $0.70/mile for 2026.

The true profit formula

True profit on an eBay sale is:

Profit = Sale Price - COGS - Final Value Fee - Payment Processing Fee - Shipping Cost - Other Costs

Most resellers only think about sale price minus what they paid (COGS). That misses 15-20% of the picture.

eBay's fee structure

As of 2026, eBay charges:

• Final value fee:Typically 13.25% of the total sale amount (item price + shipping the buyer paid). This varies by category -- check eBay's current fee schedule for your categories.
• Payment processing fee: $0.30 per order. This is separate from the final value fee.
• International fee: An additional 1.65% on international sales (if applicable).
• Promoted listings fee: If you use promoted listings, the ad rate (typically 2-15%) applies on top of everything else.

Note: eBay updates fees periodically. Always check the current fee schedule on eBay.com for your specific categories.

Worked example

Let us walk through a real example:

That $45 sale was actually $13.23 in profit. Still a solid flip, but very different from the $37 most resellers would calculate.

Costs most resellers forget

• Shipping label vs. shipping charged: You might charge the buyer $7.99 but pay $9.45 for the label. That $1.46 difference is a real cost.
• Mileage: The IRS lets you deduct $0.70/mile for business use in 2026. If you drove 10 miles round-trip to source that jacket, that is $7.00 in deductible costs.
• Supplies: Poly mailers, boxes, tape, tissue paper. Small per item, but it adds up.
• Promoted listings: If you paid 5% to promote this listing, that is another $2.25 off your profit.

Why this matters at tax time

When you file Schedule C, every dollar of cost you track is a dollar of taxable income you do not pay taxes on. The self-employment tax rate is 15.3%. Missing $1,000 in deductible costs means paying roughly $153 in unnecessary SE tax alone.

How to track it without losing your mind

You have two options: a spreadsheet or a tool built for this.

A spreadsheet works if you are disciplined about entering every fee and cost. But eBay's fee structure makes this error-prone -- the final value fee percentage varies by category, promoted listings add another variable, and shipping cost vs. shipping charged is easy to confuse.

Soldbook does this math automatically. Import your eBay sales (via OAuth sync or CSV export), match items to their sourcing costs, and get true profit per item. It takes about 10 minutes to set up.

Informational only — not tax advice.