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BIL vs TBIL: Differences, Returns & Fees

BIL's duration was 0.2 years on Jun 30, 2026 and TBIL's 0.2 on May 31, 2026; BIL charges 0.14% to TBIL's 0.15%. Net assets: $51.1bn on Oct 20, 2026 for SPDR Bloomberg 1-3 Month T-Bill ETF, and $7.6bn on Oct 19, 2026 for F/m US Treasury 3 Month Bill Fund.

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Answers cite the figures on this page.

BIL costs 0.01 points a year less; both returned +3.7% over a year; BIL is 6.7 times larger.

BIL vs TBIL: Differences, Returns & Fees
BILTBIL
Expense ratio0.14%0.15%
Net assets, as of Oct 19, 2026$51.2bn$7.6bn
Total return, 1 year+3.7%+3.7%
What it tracks1-3 month T-billsBloomberg US Treasury Bellwether 3M Total Return USD Unhedged Index (I00087US)
Holdings in commonreport dates differ

Holdings in common uses holdings dated May 31, 2026 and Jun 30, 2026.

+3.7%
BIL total return, 1 year
+3.7%
TBIL total return, 1 year
0.14%
BIL expense ratio
0.15%
TBIL expense ratio

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Client brief · page 1 of 2Report BR-F79C17D7EE

BIL and TBIL are built for the same job. How do they differ in cost, holdings and results?

  1. What each follows. BIL follows 1-3 month T-bills and TBIL follows Bloomberg US Treasury Bellwether 3M Total Return USD Unhedged Index (I00087US).
  2. Number of holdings. BIL holds 18 positions and TBIL holds 1.
  3. Size. BIL has $51.2bn in net assets and TBIL $7.6bn (net assets, as of Oct 19, 2026); BIL is 6.7 times larger.

Data as of Oct 20, 2026. The differences are picked by a fixed rule, in a fixed order; the PDF prints it. Page 2 has the returns, overlap, risks and sources.

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On the same fields

BIL
SPDR Bloomberg 1-3 Month T-Bill ETF
TBIL
F/m US Treasury 3 Month Bill Fund
Where it sits Bond ETF Bond ETF
Issuer State Street F/m
What it is Tracks an index of 1-3 month T-bills Tracks an index
Total return, 1 year +3.7% +3.7%
Expense ratio 0.14% 0.15%
Holdings 18 1
Net assets, BIL as of Oct 20, 2026 and TBIL as of Oct 19, 2026 $51.1bn $7.6bn

BIL and TBIL on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.

About BIL

BIL tracks an index of 1-3 month T-bills. Over the year to Oct 20, 2026 it returned +3.7% with distributions reinvested. The prospectus expense ratio is 0.14% a year.

About TBIL

TBIL tracks an index. The prospectus expense ratio is 0.15% a year.

Questions people ask

Which returned more over the last year, BIL or TBIL?
In the year to Oct 20, 2026, with distributions reinvested, BIL returned +3.7% and TBIL +3.7%.
Which is cheaper, BIL or TBIL?
BIL is cheaper, by 0.01 percentage points a year. That is about $1 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
BIL vs GBILBIL vs TFLOBIL vs FTSMBIL vs ICSHJPST vs TBILPULS vs TBILTBIL vs USFRTBIL vs VBIL
BIL on its own →TBIL on its own →Hold both: look the portfolio through →Rankings →BIL dividend history →BIL holdings →TBIL dividend history →TBIL holdings →Standards and sources →
Where these figures came from
BIL filings on SEC EDGAR ↗BIL prospectus with the expense ratio (SEC) ↗State Street website ↗TBIL filings on SEC EDGAR ↗TBIL prospectus with the expense ratio (SEC) ↗F/m page for TBIL ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

Cite this pageCitation, APA and Markdown

ETFIQ, BIL against TBIL, data as of Oct 20, 2026. https://etfiq.com/compare/any/bil-vs-tbil

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.