Where to Park Idle Cash

Idle cash (money you will need in weeks or months, not years) earns whatever short-dated Treasuries pay, and right now that is about 3.73% on a 1-month bill and 3.84% on a 3-month bill, as of Jul 14, 2026. The Treasury yield curve is the whole answer to what a parking spot for cash earns: its left end is the rate on cash, its right end is the rate on money you lock up for years. This page reads the live curve and shows how steady the short end has been.

What does idle cash earn right now?

The yield curve is a single snapshot of what US Treasuries of every maturity yield on one day. Read left to right, it answers a practical question: how much does the government pay you to lock your money up for one month, versus one year, versus thirty. The far-left points are the ones that matter for cash. A parking spot is a claim you can turn back into money soon, so only the shortest maturities describe it.

SELECT m AS maturity,
       round(y, 2) AS yield_pct
FROM (
    SELECT arrayJoin([
        ('1-month', yield_1_month),
        ('3-month', yield_3_month),
        ('1-year', yield_1_year),
        ('2-year', yield_2_year),
        ('5-year', yield_5_year),
        ('10-year', yield_10_year),
        ('30-year', yield_30_year)
    ]) AS t,
    t.1 AS m,
    t.2 AS y
    FROM global_markets.treasury_yields
    WHERE date = (SELECT max(date) FROM global_markets.treasury_yields)
) WHERE y IS NOT NULL

As of Jul 14, 2026 the 1-month bill yields 3.73%, the 3-month 3.84%, the 1-year 4.02%, and the 2-year 4.18%. Further out, the 10-year sits at 4.58% and the 30-year highest at 5.08%. For cash you will need soon, only the first two points count: the 1-month and 3-month bills are what a money-market parking spot pays, give or take a small fee.

T-bills: the risk-free place to park cash

A Treasury bill is short-term debt issued by the US government, in maturities from four weeks to one year. You buy it below face value and collect the full face value at maturity, and the difference is your yield. Two properties make it the default home for idle cash. It carries no meaningful default risk, so its yield is the number finance calls the risk-free rate. And the interest is exempt from state and local income tax, which lifts the after-tax yield for anyone in a high-tax state.

Most people hold T-bills without buying them directly. A money-market fund is a pool of these bills and similar short paper, and its quoted yield tracks the short end of the curve within a small fee. When you read that a fund pays close to the 1-month or 3-month Treasury rate, this curve is the source of that number. The 3.73% on the 1-month point above is, within that fee, what cash earns today.

Is the short end of the curve stable?

A parking spot is only useful if its rate is predictable. The short end moves slowly, and mostly when the Federal Reserve moves its policy rate. Between those moves the 1-month and 3-month bills barely drift. Here is the front of the curve over the last 180 days.

SELECT date,
       round(yield_1_month, 2) AS one_month_pct,
       round(yield_3_month, 2) AS three_month_pct,
       round(yield_1_year, 2) AS one_year_pct,
       formatDateTime(date, '%b %e, %Y') AS as_of_label
FROM global_markets.treasury_yields
WHERE date >= (SELECT max(date) FROM global_markets.treasury_yields) - 180
  AND yield_1_month IS NOT NULL
ORDER BY date

The three lines hold a tight band across the whole window. About six months ago the 1-month bill yielded 3.75%; as of Jul 14, 2026 it yields 3.73%, a move of well under a quarter point over half a year. The 3-month and 1-year lines track it closely, with the 1-year sitting a little higher as the market prices in where policy might sit a year out. This flatness is the feature. You can plan around a rate that does not surprise you between Fed meetings. The longer sweep of how the whole curve shifted this year is charted in the H1 2026 yield-curve breakdown.

Laddering for lumpy cash needs

Cash flows are rarely smooth. A tax bill lands in April, tuition in August, an estimated payment in the fall. A ladder matches the maturities of your bills to the dates you will need the money. You buy several bills that come due at staggered points, so one is always maturing soon while the rest keep earning.

The mechanics are simple. Split the cash into rungs, and buy bills maturing one month out, three months out, six months, a year. When the nearest rung matures it either funds the need it was earmarked for or rolls into a new far rung. You hold liquidity that arrives on a schedule and still capture the slightly higher yields further along the curve. With the 1-year point at 4.02% against the 1-month at 3.73%, the far rungs of a one-year ladder currently pay a touch more than the near ones without leaving the range of genuine cash instruments.

Cash yield versus reaching for duration

The temptation with a decent cash rate is to reach for a higher one by buying a longer bond. That extra yield is real, and so is its cost: a longer bond swings in price when rates move, a risk measured as duration. The question worth pricing is how much you get paid to accept it. This panel tracks the pickup, in basis points, from holding the 1-month bill versus the 2-year note and the 10-year note, over the same 180 days.

SELECT date,
       round((yield_10_year - yield_1_month) * 100, 0) AS ten_year_pickup_bps,
       round((yield_2_year - yield_1_month) * 100, 0) AS two_year_pickup_bps
FROM global_markets.treasury_yields
WHERE date >= (SELECT max(date) FROM global_markets.treasury_yields) - 180
  AND yield_1_month IS NOT NULL
ORDER BY date

As of Jul 14, 2026 you pick up 85 basis points of yield to swap the 1-month bill for the 10-year note, and 45 basis points to step out to the 2-year. A basis point is one hundredth of a percent, so 85 of them is under a percentage point of extra annual yield for taking on a decade of price risk. For money you have earmarked as cash, that trade rarely pays. The point of a parking spot is that its value does not move. Reaching for duration hands back exactly that property in exchange for a yield pickup this chart shows to be modest. Where the longer end of the curve fits the wider rate picture is laid out in the H2 2026 macro breakdown.

FAQ

What is the safest place to park idle cash?

Short-dated US Treasury bills, held directly or through a money-market fund, are the standard answer. They carry no meaningful default risk and mature in weeks to a year, so their price barely moves. The yield is whatever the short end of the Treasury curve pays: about 3.73% on the 1-month point as of Jul 14, 2026.

How much does idle cash earn right now?

Roughly the 1-month and 3-month Treasury rates, which stand at 3.73% and 3.84% as of Jul 14, 2026. A money-market fund pays close to that, less a small fee. Longer maturities pay more, but they are no longer cash: the 10-year yields 4.58% and moves in price when rates move.

What is a Treasury bill ladder?

A ladder is a set of bills bought to mature on staggered dates that match when you will need the money. As each rung matures it funds a need or rolls into a new longer rung. You keep cash arriving on a known schedule while capturing the slightly higher yields further out on the curve.

Should I put idle cash in a 10-year Treasury?

A 10-year note pays more than a bill, 4.58% versus 3.73% as of Jul 14, 2026, but it is not a cash instrument. Its price falls when rates rise, so it can be worth less than you paid when you need the money. The pickup for extending, currently 85 basis points over the 1-month bill, is the compensation for taking that risk.

Every panel above ships with the SQL that produced it. Expand any one to audit the numbers, or read the live Treasury curve yourself on the Strasmore terminal.