SGOV vs BIL: the differences that matter
A liquid Treasury-bill cash reserve. Both hold very short U.S. Treasury exposure, with fee, exact maturity rules and trading mechanics separating them.
A liquid Treasury-bill cash reserve. Both hold very short U.S. Treasury exposure, with fee, exact maturity rules and trading mechanics separating them.
| Decision factor | SGOV | BIL |
|---|---|---|
| Fund | iShares 0-3 Month Treasury Bond ETF | SPDR Bloomberg 1-3 Month T-Bill ETF |
| Issuer | iShares | State Street |
| Portfolio role | Short-term cash reserve | Short-term cash reserve |
| Benchmark or mandate | ICE 0-3 Month US Treasury Securities Index | Bloomberg 1-3 Month U.S. Treasury Bill Index |
| Expense ratio | 0.09% | 0.14% |
| Annual fee per $10,000 | $9.00 | $14.00 |
| Inception | 2020-05-26 | 2007-05-25 |
| Structure | Open-end bond ETF | Open-end bond ETF |
| Distribution | Monthly | Monthly |
| Breadth | U.S. Treasury securities with very short remaining maturity | U.S. Treasury bills with one to three months remaining maturity |
| Structural risk | 1 / 5 | 1 / 5 |
A fee gap of $5.00 per $10,000 per year is only one input. Trading spreads, tracking, tax consequences and portfolio construction can outweigh it.
Investors who value SGOV's lower stated fee and 0-3 month index design.
Investors already using BIL efficiently or preferring its longer operating record.
This comparison does not forecast which ticker will have the higher next-month return. It separates structural choices from recent performance and leaves dynamic values out when they cannot be refreshed and dated reliably.
Structural facts reviewed 2026-08-25. Confirm current sponsor documents before acting.
Compare SGOV and BIL by exposure, portfolio role, concentration, benchmark design, fees and implementation risk, with primary sources to verify. Begin by writing the portfolio job in one sentence. Then compare maturity range, effective duration and the way the portfolio responds to a change in yields. This prevents a familiar ticker, a recent return or a small fee difference from deciding the question before the products have been defined.
Open each objective and benchmark description. Record the eligible universe, weighting rules, reconstitution schedule and any concentration controls. If one fund uses derivatives, options, sampling or a different legal structure, name that difference explicitly. A comparison is weak when it assumes that similar historical charts prove the portfolios are interchangeable.
Convert each stated expense ratio into dollars for the proposed position, but do not stop there. Add the bid-ask spread, expected trading frequency, premium or discount risk, and any immediate tax cost from replacing an existing holding. For shorter periods, execution can outweigh a small annual fee gap. For longer periods, benchmark design and compounding can matter more.
Compare the largest positions and their combined weight, then examine sector, country, maturity or strategy exposures that drive the result. Note whether the funds overlap with holdings already in the portfolio. A new ticker does not create diversification if it repackages the same companies or the same economic risk.
A rate move can produce a price change even when credit risk is low. A useful check is to compare a parallel yield shift with a curve-steepening or curve-flattening scenario. Apply the same dates, return definition and distribution treatment to every fund. Include the possibility that spreads widen and that an order cannot be filled at the last displayed price.
Use TreasuryDirect descriptions, the fund prospectus, holdings and duration statistics. Save the document date and the exact section supporting the deciding fact. If the current source contradicts an old comparison, the current source controls. If the difference cannot be resolved, keep the uncertainty visible rather than filling it with an estimate.
No single winner applies to every account. The useful conclusion states which fund fits a defined job under stated assumptions and which facts must remain true for that choice to continue making sense.