Block’s Lending Engine Is Growing Fast. Are Credit Costs Keeping Up?

Block is turning lending into a major growth engine. The opportunity is higher engagement and gross profit; the risk is that capital and credit costs scale just as quickly.

The company’s Q3 shareholder letter reported $3.24 billion of gross profit, up 22%. Cash App gross profit grew 27%, and Financial Solutions gross profit rose 32%, driven by Cash App Consumer Lending.

Block says consumer-lending originations reached $19.0 billion in the quarter, up 40%. That includes Cash App Borrow and buy-now-pay-later products. Fast originations can create revenue and deepen customer use, but they also put underwriting, funding and loss recognition at the centre of the investment case.

For the maintained financial record, see Block’s stock profile. This article focuses on the lending economics behind the growth.

Growth and losses are arriving together

Block’s Form 10-Q reports $601.7 million of transaction, loan and consumer-receivable losses in Q3, up 66% from $363.5 million a year earlier.

The components matter. Loan losses rose 83% to $439.0 million. Consumer-receivable losses increased 27% to $99.0 million, while transaction losses rose 39% to $63.7 million.

Those figures do not prove that credit quality deteriorated. Management says underlying loan-loss rates and portfolio credit performance remained stable, and attributes the higher expense mainly to origination growth, product scaling and the upfront recognition of expected losses on loans held for investment.

That accounting is economically important. A lender that retains loans records expected credit losses before all related revenue is earned. Rapid growth can therefore depress current profit even if underwriting is stable. Conversely, a provision made today does not remove the possibility that actual future losses exceed expectations.

Block is retaining more exposure

Loans held for investment, net of allowances, increased to $4.40 billion at 30 September from $3.38 billion at the end of 2025. The related allowance for credit losses rose to $640.6 million from $382.9 million.

The gross loan balance grew faster than the net figure. The allowance equalled about 12.7% of amortised cost at September, compared with roughly 10.2% at December, based on the filing’s totals. Portfolio mix and the timing of originations affect that ratio, so it should not be read as a standalone default forecast.

Block had $7.86 billion of cash and equivalents and reported $10.06 billion of liquidity, including restricted cash, debt securities and an undrawn revolving facility. It also had $5.72 billion of long-term debt and $1.54 billion of warehouse funding facilities. The balance sheet has capacity, but lending growth is using more of it.

The operating result is stronger than the GAAP margin suggests

Q3 adjusted operating income rose 92% to $923 million, for a 29% adjusted margin. GAAP operating income was $428 million, only modestly above $409 million a year earlier.

The difference is not just credit. Block recorded large litigation and regulatory costs in general and administrative expense, while its adjusted measure excludes specified items. Investors should not compare the adjusted margin with the GAAP loss provision as if they were drawn from the same profit definition.

Cash flow also needs care. Nine-month operating cash flow rose to $3.00 billion from $1.96 billion, but the filing says accrued legal contingencies contributed to working-capital inflows. Meanwhile, investing cash flow included $1.9 billion of net outflows related mainly to Cash App Borrow and Afterpay Post-Purchase loans held for investment. Lending assets can sit outside the headline operating-cash figure.

What would make the lending model stronger?

The best outcome is not simply more originations. It is repeatable growth with stable loss rates, attractive returns after funding costs and deeper customer engagement.

Block has already shown it can adjust the product. It moved Cash App Borrow to a six-week structure and initially held credit limits constant, reducing originations per Borrow customer by 7% from the previous quarter. That is evidence of active risk and product management, though not proof of future credit performance.

Watch three indicators: loss rates by product and vintage, net growth in loans retained on the balance sheet, and Financial Solutions gross profit after the full cost of credit. If originations keep growing while loss rates stay stable and cash returns improve, lending can strengthen Cash App’s economics. If losses begin to outrun volumes, the same engine becomes a drag.

Block’s reported losses are rising because the lending business is scaling, not because the filing says borrowers suddenly became worse. The investment question is whether stable credit can survive the next stage of that scale.

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Reported figures are in US dollars and relate to Q3 2026 unless stated otherwise. Facts and management explanations come from Block’s shareholder letter and Form 10-Q; calculations and interpretation are Compound’s. General information, not personal investment advice.

Cover: Julio Lopez, Unsplash, under the Unsplash Licence. Archival photograph published 22 November 2024; capture date unconfirmed. Resized for publication and not presented as the current app interface.