How banks make money on business credit facilities — a borrower's x-ray

Updated May 2026.

The spread on your facility is the visible piece of what the bank earns. It is not the whole picture. A commercial credit relationship can produce income for the lender from several places at once — interest on the drawn balance, fees on the undrawn portion and at the event level, deposit-balance economics on the operating account that lives at the same bank, and treasury and payments revenue across the broader relationship. When borrowers look at the all-in spread and ask “is that all?” — the answer is often no, depending on how much of the relationship sits at one bank.

This page is an x-ray of where the revenue comes from, in borrower-friendly terms. It is not a calculator and not a defense of bank pricing — it is the economic picture that explains why two borrowers with similar credit profiles can be quoted meaningfully different spreads at the same bank. For the dollar-level mechanics on any specific facility, the lender income calculator models the gross-revenue side, and the net interest income guide covers why utilization is the dominant lever on facility income. The translation from this relationship-economics picture into specific pre-call asks — where the bank tends to defend, where it tends to give — is on the negotiation memo.

Where the bank's money actually comes from

Bank revenue on a commercial credit relationship generally arrives in three overlapping layers. Most borrowers see only the first clearly; the second is on the facility letter but rarely emphasized; the third lives entirely outside the facility document.

• Interest income on the drawn balance. The spread the borrower pays on the drawn portion, day by day. This is the income line most borrowers think of first, and it is usually the largest line on a heavily-utilized facility. The spread vs. yield guide explains why this number is a property of the contract, not the usage.
• Fees on the facility itself. Commitment fees on the undrawn portion, arrangement and renewal fees, unused-line fees, LC issuance fees on any letters of credit, and ABL audit and monitoring fees on asset-based lines. These compensate the bank for capital reservation, underwriting work, and servicing — and on low-utilization facilities, they can collectively rival or exceed the interest line.
• Relationship revenue outside the line. Deposit-balance economics on operating accounts that live at the same bank, treasury and payments services, lockbox and ACH origination, wire transfers, foreign-exchange margin on cross-border activity, merchant processing, and any other product the customer uses. The credit facility is often the anchor that brings the relationship in; the relationship revenue is what makes some loss-leader facilities pencil out.

A working framing: the facility is the visible product; the relationship is the larger product the facility helps the bank win. Most of the pricing posture that surprises borrowers makes more sense once you see all three layers at once.

The fee stack — what each fee actually compensates

Every fee on a facility exists for an internal reason. Knowing what the fee compensates the bank for helps explain why some are movable and others are not.

• Commitment fee on the undrawn portion.The bank has to reserve capacity for the committed line and may carry regulatory or economic capital against the committed availability — the specific treatment depends on facility type, maturity, risk weighting, conversion factors, and the bank's internal credit models. The commitment fee helps compensate for that promised capacity, even before any of it is drawn.
• Arrangement and renewal fees. Compensate the bank for underwriting and documentation work — credit analysis, legal review, collateral perfection. At renewal the work is lighter, which is why these fees are often negotiable on the renewal cycle.
• Unused-line / facility fees. Some lenders charge a flat per-period fee on top of, or in place of, the commitment fee. The internal rationale varies — sometimes it covers overhead allocated to the facility regardless of draw, sometimes it is essentially a pricing convention inherited from older fee structures.
• LC issuance fees. Compensate the bank for extending its own credit standing to a third party. The bank is not lending cash on an outstanding LC; it is lending its promise to pay. The fee approximates the cost of carrying that contingent exposure.
• Drawdown fees. Per-transaction processing cost. Often waived on relationship lines because the bank captures the same revenue elsewhere in the relationship.
• ABL audit and collateral-monitoring fees. Pass-through-ish costs of running the asset-based-lending apparatus — field audits of receivables and inventory, borrowing-base certifications, eligibility tracking. Real costs to the bank, real costs to the borrower, often more negotiable on cadence than on unit price.

The relationship — non-interest revenue beyond the line

The third layer is the one that most borrowers underestimate. The credit facility may be the anchor, but the relationship around it often generates more steady revenue for the bank than the spread on the drawn balance does. A short tour of where the bank earns when the relationship is consolidated.

• Deposit balances on the operating account.From the bank's side, operating deposits help fund the bank's earning assets and can reduce reliance on higher-cost wholesale funding. The economic value to the bank depends on deposit stability, liquidity rules, interest paid on the account, and the broader balance-sheet mix — it is not a clean deposit-in / loan-out arithmetic. It is real income that does not appear on the facility letter, and borrowers who consolidate operating balances at the relationship bank typically contribute meaningfully on this line.
• Treasury and cash-management services. Lockbox, ACH origination, wire processing, positive pay, account analysis, controlled-disbursement, sweeps. Each service typically carries a per-transaction or per-month fee. For mid-market and larger borrowers, treasury revenue can be a meaningful relationship contributor.
• Payments and merchant services. Card acceptance, payment processing, B2B payments. Banks with payments arms or partners often earn margin here even on customers who do not realize they are paying it.
• Foreign exchange margin. When the borrower executes cross-border transfers, the bank earns a spread on the FX conversion separate from any explicit wire fee. This is often the least-visible relationship revenue line and can be material for importers and exporters.
• Adjacent product cross-sell.Owner's personal banking, retirement plans, equipment financing, commercial real estate. None of these are guaranteed, but the credit relationship is often the door each of them walks through.

The cost side — what the bank pays to lend

Revenue is half the picture. Banks evaluate facilities on net contribution, which means cost is decisive too. Four cost categories typically sit below the revenue lines.

• Cost of funds. What the bank pays for the capital it lends out. For deposit-funded banks the blended cost is shaped by the deposit mix — non-interest-bearing DDAs, money-market accounts, time deposits, plus any wholesale borrowings. Banks with strong commercial-deposit franchises typically fund below banks that rely on wholesale capital markets.
• Capital cost. Banks must hold regulatory capital against committed lines and outstanding LCs. Capital costs the bank money in two ways: shareholders expect a return on it, and capital reserved for one facility is not available for another. This is part of why long-tenor and large-limit commitments cost more in spread.
• Loss provisioning.The bank reserves for the statistical likelihood of default on the facility, adjusted to credit quality and collateral. The provision is an accounting charge, not a cash outflow, but it shows up in the facility's net contribution calculation.
• Servicing and overhead. Underwriting and renewal effort, ongoing relationship-manager time, credit administration, audit and compliance. Allocated to the facility on a cost-accounting basis. Smaller facilities carry proportionally more overhead, which is part of why very small lines often look unprofitable in isolation.

Why “loss-leader” facilities can still pencil out

With those layers in mind, a counter-intuitive pattern starts to make sense. Banks sometimes price a credit facility at a spread that, taken alone, would not clear the bank's capital and overhead hurdle. The facility looks unprofitable on the facility line. The relationship as a whole still clears.

The internal logic: a customer who keeps meaningful operating deposits, uses treasury services, runs payments through the bank, and might buy adjacent products contributes revenue across several lines that share the same servicing footprint. The credit facility is often the anchor that wins the relationship, and the relationship subsidizes the facility's thin spread. This is also why pulling the deposit relationship out of the same bank can change the bank's facility-pricing posture materially — the subsidy goes away.

One practical implication for borrowers: the spread on the facility is not the only price you are paying for the bank relationship. The deposits sitting at near-zero rates, the treasury fees, and any FX margin are part of what makes the facility's spread look low. A multi-bank strategy — where deposits live in higher-yielding accounts elsewhere — may save on the deposit side while costing on the facility side. Most banking-vs-treasury decisions are this kind of trade-off rather than a clean win.

Frequently asked questions

What to read next

• Net interest income on a credit line — why utilization is the dominant lever on the facility's NII line specifically, and how strict NII differs from facility revenue.
• Spread vs. yield on a business facility — why a 3% spread is not the bank's actual yield, with a worked example you can verify.
• Business overdraft income calculator — model the gross facility revenue, including the fee stack, cost of funds, and overhead modeling.
• Types of business credit facilities — the product taxonomy: which revenue streams apply to a revolver vs an ABL line vs an LC subfacility.
• How to negotiate a business line of credit — what to do with this picture at the negotiating table.
• Business overdraft cost calculator — the borrower-side dollar cost on a single draw.

Sources and methodology

Category-level framing on bank revenue and cost structure follows the OCC Comptroller's Handbook on Loan Portfolio Management. Banking-sector composition and deposit-funding context draw from the Federal Reserve H.8 Assets and Liabilities of Commercial Banks series. No specific lender, product, or fee schedule is endorsed. This page is informational only — facility-specific economics depend on the agreement, the lender, and the broader relationship; confirm any negotiation move against your bank's relationship team or a qualified advisor. See the editorial policy for how we source numbers.