How to Calculate Your Real Profit Selling at Antique Malls
You sold $800 worth of inventory last month. Your booth rent is $300. So you made $500 profit.
Right?
Not even close.
That $800 in sales has a lot more coming out of it than just rent. And if you're not tracking the full picture, you might be working harder than you think for less than you realize.
The numbers most vendors forget
Booth rent is the obvious one. Everyone tracks it because the mall takes it whether you sell anything or not. But here's what usually gets missed:
Mall commission. Most malls take a percentage of every sale on top of rent. It ranges from 5% to 15% depending on the mall. On $800 in sales with a 10% commission, that's $80 gone before you've counted anything else.
Credit card processing fees. The mall handles the register, but those card swipe fees come from somewhere. Some malls eat them. Most pass them through to vendors, usually 2-3% of card transactions. If 70% of your sales are on cards, that's another $11-17.
Sourcing costs. This is the big one. What did you pay for the items that sold? If you bought a dresser for $40 at an estate sale and sold it for $120, your gross on that piece is $80, not $120. Across a full month of sales, your sourcing costs might eat 30-50% of revenue depending on your margins.
Gas and mileage. Driving to estate sales, thrift stores, auctions, and the mall itself. It adds up fast, especially if your booth is 30+ minutes from home or you source from a wide radius.
Supplies and repairs. Paint, hardware, cleaning supplies, price tags, display materials. Small individually, meaningful in aggregate.
A real example
Let's redo that $800 month with actual numbers:
| Amount | |
|---|---|
| Monthly sales | $800 |
| Booth rent | -$300 |
| Mall commission (10%) | -$80 |
| Credit card fees (~2.5% on 70% of sales) | -$14 |
| Sourcing costs (40% of sales) | -$320 |
| Gas/mileage (4 trips to mall + sourcing) | -$45 |
| Supplies | -$15 |
| Actual profit | $26 |
Twenty-six dollars. On $800 in sales.
Now, your numbers will be different. Maybe you source cheaper. Maybe your mall doesn't charge commission. Maybe you live five minutes from your booth. But the exercise matters because most vendors have never run it.
How to track this without losing your mind
You don't need accounting software. You need a simple system that captures four things for every item:
- What you paid for it (sourcing cost)
- What you sold it for (sale price)
- When and where it sold (which booth, which month)
- What the mall took (rent + commission + fees)
Some vendors use spreadsheets. It works until you're managing 200+ items across two locations and the spreadsheet becomes its own part-time job.
Some use notebooks. Honest and simple, but you can't sort a notebook by profit margin or figure out which booth is actually making money.
The vendors who stay profitable long-term are the ones who know their numbers at the item level, not just the monthly total. They know which types of items have the best margins, which malls eat too much in fees, and when a booth stops being worth the rent.
The questions your tracking should answer
If you can answer these questions at any point in the month, your system is working:
- What's my true profit margin this month? (After all fees, not just rent.)
- Which items have the best markup? (So you can source more of what works.)
- Am I making money at each location? (If you have multiple booths, one might be dragging down the other.)
- What's my break-even? (How much do you need to sell just to cover your fixed costs?)
- Am I paying myself for my time? (If you spend 20 hours a month on your booth and clear $100, that's $5/hour.)
That last one stings. But it's better to know than to spend a year convincing yourself you're running a business when you're funding a hobby.
Start with what you have
If you're not tracking anything right now, start this month. Open a spreadsheet or grab a notebook and write down every item you add to your booth: what it is, what you paid, and when you put it out. When it sells, log the sale price and date.
At the end of the month, subtract your costs. All of them. See what the real number is.
If you want something that does this automatically from your phone, that's what we built Max-IMS for. It tracks true cost per item, calculates profit after mall fees, and works across multiple locations. But the tool matters less than the habit. Start tracking. The numbers will tell you what to do next.
This is part of our series on building a profitable antique mall business. Next up: Consignment Tracking for Vendors: What Your Mall Statement Isn't Telling You.