Aave Founder Stani: On-Chain Lending Interest Rate is Only 5%, DeFi is Disrupting the Traditional Financial "Layered Waste"

On-Chain Lending has evolved from a niche experiment in 2017 into a market exceeding $100 billion in scale. Stani, founder of Aave, believes that the high cost of borrowing is not due to capital scarcity but because traditional finance layers redundant intermediaries that drive up costs. DeFi is fundamentally dismantling this structure. This article is based on Stani.eth’s piece “Disrupting the Cost Structure of Lending,” translated and compiled by Dongqu.

(Background: Aave and Lido’s total TVL surpasses $70 billion, dominating half of the DeFi world)

(Additional context: Stablecoins enter the “interest-earning era”: a panoramic view of yield-bearing stablecoins)

On-chain lending began to emerge around 2017 as a small-scale experiment within the crypto asset space. Today, it has grown into a market worth over $100 billion, primarily driven by stablecoin lending backed by native crypto collateral such as Ethereum, Bitcoin, and their derivatives. Borrowers leverage long positions to unlock liquidity, operate on margin cycles, and pursue yield arbitrage. The key is not innovation but validation. Years of real-world performance have shown that, even before institutional investors took notice, smart contract-based automated lending demonstrated genuine demand and a solid product-market fit.

The crypto market remains highly volatile. Building lending systems on the most active assets forces on-chain lending to confront risk management, liquidation, and capital efficiency challenges head-on, rather than hiding problems behind policies or discretionary decisions. Without native crypto collateral, we cannot truly see the power of fully automated on-chain lending. The core is not the assets themselves but the cost structure revolution brought by decentralized finance.

Why On-Chain Lending Is Cheaper

The reason on-chain lending is cost-effective is not because it’s a new technology but because it cuts out the redundant layers in traditional financial systems. Today, borrowers can access stablecoins at around 5% interest on-chain, whereas centralized crypto lending platforms often charge 7% to 12%, plus fees, service charges, and various add-ons. Under favorable conditions, choosing centralized lending over decentralized options is not only unwise but irrational.

This cost advantage does not rely on subsidies but stems from capital aggregation effects in open systems. Permissionless markets outperform closed ones in capital pooling and risk pricing—because transparency, composability, and automation foster fierce competition. Capital flows more swiftly, idle liquidity is punished immediately, and inefficiencies are exposed in real time. Innovation spreads instantly.

When new financial primitives like Ethena’s USDe or Pendle emerge, they absorb liquidity from the entire ecosystem and expand the scope of existing primitives (like Aave) without the need for sales teams, reconciliation processes, or logistics. Code replaces management overhead. This is not just incremental improvement but a fundamentally different operating model. All cost advantages ultimately benefit capital allocators and, more importantly, borrowers.

Every major historical transformation follows this pattern: shifting from asset-heavy to asset-light models, from fixed to variable costs, replacing human labor with software, scaling decentralization over regional duplication, converting idle capacity into dynamic utilization. These changes often seem unimpressive at first—serving niche users (like crypto lenders rather than mainstream applications), winning on price before quality improves, and before incumbents can react at scale, they appear unserious.

On-chain lending exemplifies this pattern. Early users were mostly small crypto holders. User experience was poor. Wallet operations were daunting. Stablecoins were inaccessible without traditional bank accounts. But none of this mattered—costs were lower, execution faster, and the entry barrier was global and uniform. As surrounding experiences improve, on-chain lending becomes increasingly user-friendly.

Future Developments

In a bear market, declining demand and compressed yields reveal a more critical dynamic. Capital in on-chain lending remains in constant competition. Liquidity does not stagnate due to quarterly decisions or balance sheet assumptions—it is continuously re-priced in a transparent environment. Few financial systems are as ruthlessly efficient.

On-chain lending is not capital-starved; it lacks only the collateral to lend against. Currently, most on-chain lending involves recycling the same collateral into similar strategies. This is not a structural bottleneck but a temporary limitation.

Crypto will continue generating native assets, productive primitives, and on-chain economic activity, expanding lending coverage. Ethereum is gradually maturing into a programmable economic resource. Bitcoin continues to solidify its role as an energy reserve. Neither has reached its final form.

If on-chain lending is to reach hundreds of millions of users, it must incorporate real economic value, not just abstract financial concepts. The future involves integrating autonomous native crypto assets with tokenized real-world rights and obligations—not to replicate traditional finance but to operate it at extremely low cost. This will catalyze the replacement of legacy financial backends with decentralized finance.

Today’s high borrowing costs are not due to capital scarcity—capital is abundant. Prime capital has a clearance rate of about 5% to 7%, while risk capital clears at 8% to 12%. Borrowers still pay high interest because every link in the capital cycle is inefficient.

Lending segments inflate due to customer acquisition costs and outdated credit models. Binary approval processes overcharge quality borrowers while subsidizing bad ones until default. Service layers still rely on manual processes, heavy compliance, and slow workflows. Incentive misalignments are everywhere—risk assessors rarely bear risk; brokers do not hold default responsibility; lenders immediately sell off risk exposure. Regardless of outcomes, everyone still gets paid. This feedback failure is the hidden cost of lending.

Lending has been slow to be disrupted because trust overrides user experience, regulation suppresses innovation, and systemic losses often mask inefficiencies before they explode. When lending systems collapse, the consequences are often catastrophic, reinforcing conservative thinking rather than driving progress. As a result, lending remains a relic of the industrial age grafted onto digital capital markets.

Unless lending, risk assessment, services, and capital allocation are fully software-native and on-chain, borrowers will continue to pay excessive fees, and lenders will keep making excuses for these costs. The solution is not more regulation or marginal experience improvements but a fundamental overhaul of the cost structure—automating processes, replacing discretion with transparency, and ensuring certainty over cumbersome reconciliation. This is the core of how decentralized finance can revolutionize lending.

When on-chain lending’s end-to-end operational costs are significantly lower than traditional lending, mass adoption becomes inevitable. Aave emerged in this context, poised to become the foundational capital layer of a new financial backend, serving everything from fintech firms and institutional lenders to everyday consumers.

Lending will become the most empowering financial product because the cost structure of decentralized finance enables rapid capital flow into the most needed applications. When capital is abundant, opportunities naturally arise.