Who Pays for 0% Financing: Merchant Discount Fees Explained

"0% financing available" is one of the most effective sentences in retail and contracting, and it is never a description of something free. Zero percent describes what the customer pays. The capital still has a cost, defaults still happen, and a platform still runs the machinery. When the customer is not paying for those things through interest, somebody else is, and in point-of-sale financing that somebody is almost always the merchant, through a discount fee that quietly reprices the job.

This piece explains where the money actually comes from in each program model, how merchant fees are structured, and how to model what financing genuinely costs per funded job, using your numbers rather than anyone's brochure. It pairs with the series hub, which maps the models themselves.

The conservation law of financing cost

Every financing arrangement distributes cost across three parties: the customer, through interest, lease payments, or fees; the merchant, through discount fees, subscriptions, or per-transaction charges; and, in a limited sense, the platform's investors when pricing is subsidized for growth, which is not a plan you can build on. When a sales deck shows a generous customer offer with a trivial merchant fee, look for the missing cost; it is usually in the customer's terms. When it shows generous customer terms and claims a trivial fee on your side too, look harder.

Numbers are deliberately absent from that table. Fee schedules are platform-specific, they change, and published or typical ranges vary; verify the live schedule on each platform's own pricing materials and merchant agreement. What does not change is the structure: generosity to the customer is purchased, and the receipt usually has your name on it.

How to model your real cost per funded job

The only fee number that matters is the one attached to your funded volume, blended across the plans your staff actually selects. Build the model with four inputs: your financed volume by plan, the fee on each plan from the current schedule, your refund and cancellation rate and how the platform treats fees on those, and any fixed costs such as subscriptions or integration work.

To see the mechanics, take a deliberately invented number, used here only for arithmetic: suppose a promotional plan carried a six percent discount fee, a figure that is not any platform's actual price. On a ten-thousand-dollar job, funding would arrive six hundred dollars light. If your net margin on that job was twenty percent, the fee just consumed nearly a third of it. Whether that is a good trade depends entirely on the counterfactual: if the promo closed a job you would otherwise have lost, the six hundred dollars bought two thousand dollars of margin and was cheap; if the customer would have proceeded anyway, on a standard plan or cash, the same fee was a pure gift. The fee is not the decision; the counterfactual is.

That counterfactual is measurable, imperfectly but usefully. Track four counts for sixty to ninety days: jobs where financing was offered, applications started, offers accepted, and jobs funded, alongside close rates on comparable unfinanced jobs. Merchants who run this exercise stop arguing about fee percentages in the abstract and start arguing about which plans earn their keep, which is the correct argument. The platform checklist folds these questions into the selection process itself.

Pricing effects, and the surcharge trap

A predictable temptation follows the first fee-laden funding statement: recover the fee from financed customers specifically, by quoting them a higher price or adding a line item. Treat that as off-limits until you have read your merchant agreement and checked your state's rules, because program agreements commonly prohibit charging financed customers more than cash customers, and some states restrict surcharging practices generally. The compliant alternative is unexciting: financing cost is a cost of doing business, recovered in your pricing across the board, the same way card interchange is. Businesses with heavy promo usage price it in; businesses that cannot price it in should be choosing cheaper plans, not inventing surcharges.

A second, subtler pricing effect: promo fees are a percentage of the financed amount, so they scale with ticket size, and staff who default to the most generous plan on the biggest jobs are concentrating your fee spend exactly where the dollars are largest. Plan-selection policy, which plans staff may offer, and when, is fee management.

Deferred interest: the fee you pay in trust

Deferred-interest promotions sit in an odd corner of the cost map: the merchant fee is moderate, the customer's headline cost is zero, and the residual cost is carried as risk by the customer who misses the payoff deadline and receives months of retroactive interest at once. Some of that cost then transfers to you in a currency no funding statement shows: reviews, disputes, and a customer who tells the story with your company's name in it, not the bank's. If you offer these plans, the mitigation is presentation: the deadline stated plainly, in writing, every time, with the platform's approved language. The mechanics are covered in the GreenSky overview, where these plans are a menu staple.

Who this is not for

This whole cost apparatus is a poor fit for some businesses. If your average ticket is small, percentage fees plus application friction rarely beat a card tap, and pay-in-4 products or simply not offering financing may serve you better. If your margins are commodity-thin, merchant-subsidized promos are structurally unaffordable and the customer-pays models are the only rational shelf. And if you cannot get the data to measure the counterfactual, offered, applied, funded, closed, you are not equipped to know whether fees are buying anything, and the honest move is a small measured pilot, not a program-wide promo menu.

Common mistakes

• Comparing platforms on one plan's fee instead of the blended cost across the plans staff will actually use.
• Ignoring refund treatment, then discovering on the first big cancellation whether fees come back.
• Letting the most expensive promo become the default offer without a measured close-rate justification.
• Surcharging financed customers in violation of program terms or state rules.
• Treating customer-pays models as free while ignoring operational costs and what your weaker-credit customers are being quoted.
• Booking financing fees nowhere in particular, so no one ever sees the annual total.
• Confusing a growth-subsidized introductory fee schedule with a permanent one; read the agreement's repricing terms.

How to verify

• Get the complete current fee schedule, every plan, every tier, in writing, and confirm how often and with what notice it can change.
• Confirm refund, cancellation, and change-order mechanics: what happens to the fee, and to the customer's account, in each case.
• Ask whether any subscription, gateway, integration, or minimum-volume charges exist beyond the discount fee.
• Confirm funding timing, since float is a cost too, and how funding statements itemize fees for reconciliation.
• Read the merchant agreement's pricing, repricing, and surcharge clauses, and check your state's surcharge rules before any fee-recovery scheme.
• Run the sixty-to-ninety-day pilot and compute your actual blended cost per funded job before rolling financing into every estimate.