SLM vs SOFI: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: SLM is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. SLM and SOFI share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined SLM and SOFI exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

SLM Corporation, known as Sallie Mae, is a consumer bank built around private education loans. It originates and holds Private Education Loans for students and families to cover the gap between college costs and federal aid and scholarships, and it funds those loans primarily through retail deposits at Sallie Mae Bank. It is the dominant player in US private student lending, holding roughly a 64 percent share of the market and originating about $7.4 billion of loans in 2025. Its business model leans on a wide net interest margin (around 5.3 percent), disciplined underwriting with high cosigner rates, and a heavy program of loan sales and share buybacks to return capital.

Full SLM guide

SoFi Technologies is a digital-first financial services company built around a mobile app that bundles lending, banking, investing, and credit cards, and it holds a national bank charter that lets it fund loans with lower-cost deposits. Its three reporting segments are Lending (personal, student, and home loans), Financial Services (checking and savings, SoFi Money, invest, credit card, and the Loan Platform Business that originates loans on behalf of partners), and the Technology Platform (Galileo and the Technisys core-banking stack, which provide payments and banking rails to other fintechs and brands). Total members reached roughly 14.7 million and total products about 22.2 million as of Q1 2026.

Full SOFI guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• SLM drivers: Dominant, high-margin niche lender; Capital return through buybacks and loan sales.
• SOFI drivers: Member and product growth flywheel; Shift to fee-based, capital-light revenue.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: SLM's fortunes are tied to consumer credit, so a weaker job market for graduates could push charge-offs and provisions higher and compress earnings. For SOFI, soFi carries meaningful consumer-credit exposure, so a weaker economy or rising unemployment could lift charge-offs on personal and student loans and pressure earnings.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick SLM if you believe its drivers more; SOFI if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the SLM and SOFI guides.

SLM. SLM trades at a low earnings multiple (roughly high single digits on a forward basis) and around or below book value, which is typical for a specialty consumer lender the market views as credit-sensitive. Net interest income was about $375 million in the first quarter of 2026 on a net interest margin near 5.3 percent. Figures are approximate and drawn from the most recent reported results as of July 2026.

SOFI. SoFi trades at a clear premium to the consumer-finance industry, where forward P/E averages closer to 10x, reflecting expectations of continued 30-percent-range revenue growth. Full-year 2026 guidance points to adjusted net revenue of roughly $4.655 billion and adjusted EPS near 60 cents. The valuation embeds strong execution, so figures should be checked against the latest filings.

Headline figures (approximate, July 2026): SLM shows market cap ~$4B, revenue (ttm) ~$2B, q1 2026 eps (gaap diluted) ~$1.54, 2026 eps guidance ~$3.10 to $3.20; SOFI shows revenue (ttm) ~$3.9 billion, q1 2026 net revenue ~$1.1 billion (adj. +41% YoY), net income (ttm) ~$577 million, market cap ~$22 billion.

SLM and SOFI are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined SLM and SOFI exposure against your real portfolio. It is not an investment adviser.