When Sarah signed her first booth lease, the manager mentioned "10% commission" almost in passing—after they had already shaken hands on the rent number. Sarah nodded, signed, and moved in. Six months later, she ran the math properly for the first time and realized commission had quietly cost her almost as much as rent. Two numbers had been on the contract. She had only seen one.
Commission is the most under-modeled cost in booth and consignment selling. It looks small as a percentage. It is large as a dollar figure. And it compounds with rent, fees, and shrinkage in ways that change which months actually pay you. Here is how to read its impact on your bottom line—before, not after, you sign.
What Commission Really Is
Most antique-mall and consignment-store models use one of three structures:
- Flat commission — a fixed percentage of every sale (typically 5–15% for booth setups, 30–60% for full consignment).
- Tiered commission — different percentages for different item categories or price bands.
- Commission + rent hybrid — the dominant antique-mall pattern: a base monthly rent plus a per-sale percentage.
The hybrid model is the one that catches new sellers off guard. "It's only 10%" feels minor when rent is what shows up on the contract in 24-point font. But 10% of $3,000 in sales is $300, which is often a meaningful share of the rent itself.
The Math That Changes the Decision
Sarah's actual first-year numbers, simplified:
| Line | Year 1 total | Notes |
|---|---|---|
| Gross sales | $28,400 | Booth tag sales, all categories |
| Commission (10%) | −$2,840 | Withheld from payouts |
| Booth rent | −$3,600 | $300/month × 12 |
| Credit card fees (mall passes through) | −$710 | ~2.5% effective |
| COGS (her landed cost) | −$11,360 | ~40% of gross |
| Supplies, mileage, admin | −$1,920 | Tracked in P&L |
| Net profit (excl. labor) | $7,970 | ~28% of gross |
Commission was her third-largest cost line, behind COGS and rent. Not a rounding error. If the rate had been 15% instead of 10%, that line jumps from −$2,840 to −$4,260, and her net profit drops from $7,970 to $6,550—a 17.8% hit to take-home for what feels like "just a percentage point or two."
The Compounding Effect
Commission interacts with every other line in nasty ways:
- Commission applies to gross sales, not net. You pay it on the markdown stickers too.
- Credit card pass-through often layers on top of commission, not under it.
- Promotional discounts reduce your revenue but commission is still computed on the discounted price—small consolation.
- Returns and refunds usually do not refund the commission you paid, depending on contract.
- Year-end tax forms show the gross sales figure, not the net-of-commission figure. Your bookkeeping has to compensate.
The cumulative effect is that a 5-percentage-point swing in commission can change a marginally profitable booth into a loss-making one. Run the actual numbers before signing or renewing.
Modeling Break-Even Properly
The booth break-even formula most sellers use is wrong because it treats commission as if it does not interact with the rest of the P&L. Sarah's revised version:
Break-even sales = (Rent + Supplies + Admin) ÷ (1 − Commission% − CC fee% − COGS ratio)
For her numbers: ($3,600 + $1,920) ÷ (1 − 0.10 − 0.025 − 0.40) = $5,520 ÷ 0.475 ≈ $11,621/year. That is the gross-sales target she needs to clear just to zero out the fixed lines and the per-sale costs—before she takes home a dollar.
Most sellers don't run this version because the denominator looks weird. But it accurately reflects how commission and COGS compound: every dollar of gross sales already has a fee burden baked in before it can pay rent.
The Commission Negotiation Conversation
Commission is more negotiable than booth rent in many malls. The leverage points:
- Multi-booth leases. If you carry two or three booths, ask for a commission step-down on the additional ones.
- Long-tenure renewals. Year-three sellers in good standing often negotiate a percentage point lower than new entrants.
- High-volume categories. If you are a top-three booth in the mall, you have data to bring to a conversation.
- Off-peak signings. Mall managers offer concessions in January and February that disappear in October.
One percentage point sounds small. On Sarah's volume, it's $284 a year—roughly half a month's rent.
Commission vs Higher Rent: Which Should You Choose?
Some malls offer a "no commission" plan with a higher base rent. The math is rarely complicated:
| Plan | Rent | Commission | Annual cost at $28K sales |
|---|---|---|---|
| Plan A (Sarah's current) | $300/mo | 10% | $3,600 + $2,840 = $6,440 |
| Plan B (higher rent) | $425/mo | 5% | $5,100 + $1,420 = $6,520 |
| Plan C (no commission) | $525/mo | 0% | $6,300 + $0 = $6,300 |
At Sarah's volume, the three plans are almost identical. But the answer changes with volume—at $40K in sales, Plan A costs $7,600, Plan B costs $7,100, and Plan C still costs $6,300. The higher-volume seller wins under lower-commission structures.
The Quiet Hidden Costs
- Holiday tag fees and category-specific surcharges that the mall adds at peak.
- Mid-year commission bumps that some contracts allow with 30 days' notice.
- Tier resets if your sales volume drops below a threshold.
- Cross-promotion fees for being included in mall-wide sales events.
None of these are deal-breakers; all of them are line items worth modeling before they appear in a payout statement.
What Sarah Did Next
She did three things at renewal. She asked for a 1-point commission reduction (granted). She modeled two adjacent plan tiers (one wasn't viable at her volume). She started tracking commission as its own P&L line instead of netting it against revenue. Within six months she could read the booth's monthly performance at a glance—and the answer was no longer "I guess so."
Commission is not a small number. It is a percentage applied to every dollar that crosses the register, in a business where percentages compound. Treat it like rent—because that is closer to the truth than most contracts admit.