Behind every lending business is a set of decisions about what, exactly, you are selling: how much, for how long, at what rate, with what fees, to whom. Those decisions are your loan products, and they determine whether you make money or slowly bleed it. Designing a product well means understanding what it actually costs you to lend, pricing to cover that with a margin, and doing it in a way that is transparent and compliant. This guide walks through the levers.
The four levers of a loan product
Every product is a combination of four choices. Price is the interest rate and any fees. Term is how long the borrower has to repay. Interest method is how interest is computed (add-on, diminishing, and so on). And risk is who you'll lend to and how you'll secure it. Change any lever and the product's economics and appeal shift. The art is finding the combination that borrowers want and that reliably makes you money.
Price to cover your real costs
The single most important discipline is pricing to cover your true cost of lending. That cost has three parts: your cost of funds (interest you pay on money you borrowed to lend), your operating cost (staff, collections, compliance, systems), and your expected losses (the share of loans that won't be repaid). Your interest rate and fees must cover all three and still leave a margin. Lenders who price only against the competition, without knowing their own costs, discover too late that their "profitable" product was losing money on every loan.
Match the interest method to the product
The interest method shapes both the borrower's experience and your income timing. Add-on interest is simple and common for small, short micro-loans, but its effective rate is higher than it looks. Diminishing balance is fairer and standard for larger or longer loans, with a quoted rate close to the effective rate. Choose deliberately, and remember that whichever you pick, the Truth in Lending Act requires you to disclose the effective rate — so the method affects what you must show, not whether you must be honest.
A product can be profitable and predatory at the same time. The best lenders design products that make money precisely because borrowers succeed and come back — not because they’re trapped.
Fees, penalties, and compliance limits
Fees and penalties are part of the product, but they are also where regulators watch most closely. The SEC has issued circulars capping interest and penalty charges on certain consumer and online loans, so a fee structure that looks profitable on a spreadsheet may exceed what you're allowed to charge. Design your fees within the applicable caps, disclose them clearly, and remember that documentary stamp tax attaches to the loan document regardless of how you structure the charges.
Test, measure, and refine
A loan product is never finished. Once it's live, watch how it actually performs: its Portfolio-at-Risk, its default rate, its real yield after losses. A product with a beautiful headline rate but climbing PAR is not profitable — it's booking interest it will later write off. Use your portfolio data to refine pricing, tighten who qualifies, or adjust terms. The lenders who win treat product design as an ongoing loop informed by real numbers.
Segment your borrowers
One product rarely fits every borrower, and the lenders who grow profitably usually offer a small range of products matched to different borrower segments. A first-time borrower with no track record carries more risk than a repeat borrower who has paid off three loans, and pricing both identically means either overcharging the good borrower or underpricing the risky one. Segmenting lets you reward reliability — offering better terms or larger amounts to proven borrowers — while pricing appropriately for the uncertainty of newer ones. This turns your product line into a ladder that borrowers climb as they build a history with you.
Segmentation also strengthens retention, which quietly drives profitability. Acquiring a new borrower costs far more than serving an existing one, so a product structure that gives good borrowers a reason to come back — a graduated limit, a loyalty rate, a faster approval — compounds over time. The goal is a virtuous cycle: borrowers who succeed with a small, appropriately priced first loan graduate to larger, better-priced products, staying with you as they grow. Designing that ladder deliberately, rather than offering one rigid product to everyone, is how a lending book becomes both larger and safer at once.
Design with your numbers in front of you
Good product design depends on knowing your real economics — your yield, your losses, your aging — not guessing. LendKoPH computes the amortization for whatever method and price you choose, and surfaces the portfolio metrics (PAR, aging, yield) that tell you whether a product is actually working. You set the levers; the system shows you the truth, so you can design products that are profitable, fair, and compliant.
Frequently asked questions
What are the main levers in loan product design?
Price (interest and fees), term (repayment period), interest method (add-on, diminishing, etc.), and risk (who you lend to and how it is secured). Together they set a product’s profitability and appeal.
How should I price a loan product?
To cover your cost of funds, your operating cost per loan, and your expected losses — then add a margin. Pricing only against competitors, without knowing your own costs, is how "profitable" products lose money.
Are there limits on the fees I can charge?
Yes. The SEC has capped interest and penalty charges on certain consumer and online loans. Design fees within the applicable caps, disclose them clearly, and account for DST on the loan document.
How do I know if a product is actually profitable?
Watch its real performance — Portfolio-at-Risk, default rate, and yield after losses. A high headline rate with rising PAR is not profitable; it is interest you will later write off.
