Kalshi interest: what Kalshi pays on your balance, and when.

The 3.25% figure is still live. On October 9, 2026, Kalshi’s Kalshi Klear article gave 3.25% while the APY article and the order ticket gave 3.50%. The APY article is the help page dedicated to the program. A rate missing from this table, such as one quoted only by a promotional site, is left out because no Kalshi page states it.

October 10, 2024

4.05% APY on cash and open positions; the post said the rate adjusts with the Federal Reserve’s rates

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August 13, 2025

4% interest on cash and open positions, on every market

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March 10, 2026

3.25% APY, variable, in Kalshi’s Kalshi Klear help article

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Interest rate

3.50%, variable, paid monthly on balances of $250 or more

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Kalshi’s article says “Interest is paid monthly, but accrual is calculated daily”, and that payment comes “normally within the first week of the following month but can take up to 10 business days to process.” On the account captured for this page, the interest for September 2026 posted on October 6 at 3:04 AM Eastern, labeled “Interest for September 2026”.

On that schedule, each month’s interest posts in the following month, so December’s arrives in early January. Kalshi does not say which year’s 1099-INT carries a payment made in January for December.

When it is paid

Calculated daily, paid monthly, normally in the first week of the following month and up to 10 business days later

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Kalshi pays interest as a credit. The September 2026 payment on the Realize founder’s account appears in three places, to the same second, and in a fourth not at all:

Kalshi’s Documents page says its P&L reflects closed positions “including fees and any credits or rebates you’ve received.” Interest is one of those credits, so the year’s P&L with fees already holds the interest that the 1099-INT reports. Adding the two together counts that interest twice; subtracting the credit rows from the P&L total leaves the trading result.

The same row type carries incentive credits. On this account, a $5.00 “Superbowl Deposit Delay Credit” in February and a −$5.00 “Expired Incentive Credit” in March both have Credit_Type incentive and net to zero in the P&L. Kalshi reports more than $600 of incentive credits a year on a 1099-MISC, with thresholds and the IRS line on Kalshi tax forms. How each column of the P&L download reads is on Kalshi data and exports.

In Your activity

A credit, “Interest earned + $0.80”; the export labels it Credit_Type interest, Credit_Reason “Interest for September 2026”

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In the P&L download

A credit row of 0.80 in both profit columns, stamped to the same second as the activity credit

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In the public API

No endpoint returns interest payments; “interest” appears only as open_interest

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Credit rows

type credit, quantity 0, no ticker or side, the credit as the profit

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Incentive credit rows

Credit_Type incentive: +$5.00 “Superbowl Deposit Delay Credit” on February 9, 2026 and −$5.00 “Expired Incentive Credit” on March 11, 2026

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Incentive credits

More than $600 in a calendar year is reported to the IRS, and needs an SSN on file

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Kalshi’s help center says: “If you earn more than $10 in interest payments annually, Kalshi is required to report this to the IRS.” $10 is also the IRS line for a 1099-INT (IRS instructions). Kalshi needs a Social Security Number on file to pay interest above $10 a year. At 3.50%, about $286 held for a full year crosses the line.

Interest reaches a return separately from trading results, however those are filed. The IRS says taxable interest is reported “even if you don’t receive a Form 1099-INT” (IRS Topic 403); the lines it goes on are on Kalshi taxes, and every form Kalshi sends is on Kalshi tax forms.

Interest

More than $10 in a year is reported to the IRS

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Social Security Number

Needed to receive interest payments above $10 a year

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1099-INT

Interest payments from Kalshi

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Does Kalshi pay interest?

Yes. As of October 9, 2026, Kalshi’s help center sets the rate at a variable 3.50% APY on cash and open positions, including the collateral behind a position, for accounts with a balance of $250 or more in the United States and its territories.

What is Kalshi’s APY?

3.50%, variable, as of October 9, 2026. Kalshi says it passes on the interest it receives from its banking partners and that the rate can change at any time. It announced 4.05% on October 10, 2024 and 4% on August 13, 2025, and its Kalshi Klear help article, dated March 10, 2026, gives 3.25%.

Was Kalshi’s interest rate 3.25%?

Kalshi’s help article on Kalshi Klear, dated March 10, 2026, gives 3.25% APY, and still did on October 9, 2026. Its APY article, the help page dedicated to the program, gives 3.50% on the same day, as does the order ticket.

When does Kalshi pay interest?

Monthly. Interest is calculated daily and paid normally within the first week of the following month, though Kalshi says it can take up to 10 business days. September 2026’s interest posted on October 6, 2026, labeled “Interest for September 2026”.

Is Kalshi interest on a 1099?

On a 1099-INT, above a dollar line. Kalshi says it reports more than $10 of interest a year to the IRS, and that a Social Security Number is needed to receive interest payments above $10 a year. At 3.50%, about $286 held for a full year earns $10.

Why does my Kalshi P&L include interest?

Kalshi pays interest as a credit, and its P&L download lists credits as rows beside trades. The Documents page says its P&L includes “fees and any credits or rebates”, so the P&L with fees total carries the same interest the 1099-INT reports.