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Unit EconomicsAI draft

Why Financing Hurts Your Unit Economics (And When It Doesn't)

Most indie jewelers assume financing grows AOV. It does. But the cost structure often erases the gain. Here's how to know if it makes sense for your business.

The K99 Editors·Strategy and operations notes from the team behind K99.··5 min read

Financing looks like free growth. A customer wants a $4,000 engagement ring but only has $1,500 liquid. Offer them a payment plan, and the sale closes. Your average order value rises. Your conversion rate rises. You think you've won.

You haven't. You've transferred risk and cost to yourself while compressing your margin. For most independent jewelry operators—especially those under $2M in annual revenue—financing is a value-destroying feature dressed up as a growth lever.

The Math That Looks Good (But Isn't)

Let's work through a concrete example. Assume you're a $1.2M revenue shop doing 150 transactions per year at a current $8,000 AOV. Your gross margin is 55%. You're thinking about offering six-month financing on purchases over $2,500.

Here's what happens:

  • Without financing: 150 transactions × $8,000 = $1.2M revenue. Gross profit: $660K.
  • With financing: Financing captures 20 of your existing customers who would have bought anyway, plus 10 new ones drawn by the availability of credit. That's 30 financed orders at $4,500 average (lower than your current AOV because they're price-sensitive). Plus your existing 130 unfinanced orders at $8,000.
  • New revenue: (130 × $8,000) + (30 × $4,500) = $1.265M. Revenue growth: +5%.

That looks decent. But now subtract the actual cost of financing.

Where the Margin Goes

Every financing provider takes a cut. The major platforms—Affirm, Klarna, Afterpay—charge merchants 2–8% of transaction value, depending on approval rates and default risk. Your jewelry category sits at the higher end because average order values are large and default rates on luxury goods are higher than on, say, apparel.

Let's assume you negotiate 5.5% (optimistic for jewelry under $2M revenue). On 30 financed transactions totaling $135K, you pay $7,425 in processing fees.

But that's not the only cost. You also absorb:

  • Chargeback and fraud liability: Most financing providers shift chargeback liability to you. If a customer disputes a $4,500 order, you eat the transaction fee plus a $15–$25 chargeback fee, and you lose the goods. Jewelry is a high-fraud category. Model 2–3% of financed orders as chargebacks. That's $4,050 in expected loss.
  • Customer service overhead: Financed customers contact you more. They have questions about payment schedules, they miss payments, they want to modify terms. Plan for 20–30 minutes per financed transaction in support time. At $50/hour (your blended support cost), that's $150–$225 per order, or $4,500–$6,750 total.
  • Inventory carrying cost: Financed customers often want custom or semi-custom pieces. That ties up inventory or requires build-to-order. Assume 10% of financed orders require 8 extra weeks of working capital. At a 12% annual carrying cost on $54K of inventory (30 orders × $4,500 × 40%), that's $432 in annual carrying cost, or $144 per order.

Total cost of financing on your 30 orders:

  • Processing: $7,425
  • Chargebacks and fraud: $4,050
  • Support overhead: $5,625
  • Carrying cost: $4,320
  • Total: $21,420

Your financed orders generated $135K in revenue at a 55% gross margin: $74,250 in gross profit. Financing costs reduce that to $52,830. Your effective margin on financed orders is now 39%—a 16-percentage-point haircut.

Meanwhile, those 20 customers you captured from your existing base? They were going to buy anyway. You've simply delayed and discounted their purchase. You've gained $0 in incremental revenue from them, but you've incurred $4,950 in financing costs (20 orders × $247.50 per order in costs).

Why Operators Get This Wrong

The appeal is obvious: you see the revenue number grow. You see the order count rise. You don't see the margin compression in real time because it's embedded in cost of goods, support labor, and risk provisions that don't show up on a single P&L line.

Many operators also believe financing is table stakes—that customers expect it, and they'll shop elsewhere if you don't offer it. This is rarely true. Customers in the $4K–$8K range for engagement rings are not price-shopping on availability of financing. They're shopping on design, quality, and trust. If they want financing, they'll bring their own: a credit card, a personal loan, or a conversation with their bank.

The third mistake is assuming approval rates stay constant. They don't. As you attract more price-sensitive customers, your approval rate on financed orders typically falls from 80% to 60–70% over time. Lower approval rates mean the provider increases your fee, or you have to absorb the cost of declined transactions and customer frustration.

When Financing Does Make Sense

There are three scenarios where financing is worth the cost:

1. You're competing for a specific, price-sensitive segment. If you're a $500K–$1.2M shop with strong local brand recognition, and you know that 15–20% of your addressable market (couples earning $80K–$120K annually) would buy engagement rings in the $3K–$5K range if financing were available, financing can unlock that segment. The math works if those customers are truly incremental and not just your existing customer base on a payment plan. You need transaction-level data to know this. Most operators don't have it.

2. Your inventory turns slowly and you have excess working capital. If you're sitting on $300K in inventory that you'd otherwise carry for 12+ weeks, financing can accelerate turns and reduce carrying costs enough to justify the 5–6% fee. This is rare for independent retailers, but it happens in custom-heavy or seasonal businesses.

3. You're using financing as a customer acquisition channel, not just a payment option. Some operators partner with a financing provider on co-marketing: the provider pays for the ads, and you split the customer. If the provider is bearing the acquisition cost, the economics flip. You're not paying for the customer; they are. In that case, even a 5.5% fee might be worth it. But read the fine print. Most co-marketing deals are structured to benefit the provider, not you.

The Path Forward

If you're already offering financing and it's not working, kill it. The sunk cost of the integration is gone. Don't let it trap you into years of negative unit economics.

If you're considering it, build a model for your specific business. Use your actual AOV, your actual margin, your actual support cost. Run the numbers for both incremental customers and customers you'd capture from your existing base. If the effective margin on financed orders falls below 40%, the feature is destroying value.

If you do implement financing, set a hard approval-rate floor (60% minimum) and a cap on fees (4.5% maximum). When either metric breaks, pause the program and renegotiate or exit. Financing is a feature, not a strategy. It should improve unit economics or serve a clear customer acquisition goal. If it does neither, it's tax on your business.

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