Walnut
Get started free

Invest on purpose

Invest every week or month, without thinking about it.

Pick a basket, an amount and a schedule, and Walnut buys with cash already at your broker.

Set up a recurring buyBrowse ideas
  • Weekly or monthly
  • Uses cash at your broker
  • Pause any time

Recurring · AI infrastructure

$200 every month

Active
Next buyNov 1
Oct 1Invested$200.00
Sep 2Invested$200.00
Sep 1Waiting for cash$0.00
Aug 3Invested$200.00
Retried, not doubledSeptember went in on the 2nd, once.
Sample, for illustration

How it works

What happens on the day

  1. Set it up once

    In Invest, choose Recurring, an amount and a schedule.

  2. Walnut checks your cash

    It reads the cash in your brokerage account.

  3. It buys to your weights

    The amount is split across your target weights.

  4. You hear how it went

    Every buy and skip shows in notifications.

Built to be trusted with money

Four rules every plan follows.

Walnut never moves money from your bank.

  • Never twice

    Each period is invested once.

  • Never silently skipped

    Short on cash, it retries for up to 5 days.

  • No catch-up bursts

    After a pause, it resumes at the next date.

  • Your day, every month

    The 31st becomes Feb 28, then Mar 31 again.

The recurring investing guideBy the Walnut team · Updated October 2026 · 2 min read

Common questions about recurring buys.

Does Walnut take money from my bank?

Short answer

No. It spends cash already in your brokerage account, put there by you or your broker's automatic transfer.

If your broker pulls $200 on the 28th, set the plan for the 1st. Walnut uses cash, not margin buying power.

Read the full guide: How recurring investments work

What happens if there isn't enough cash?

Short answer

Walnut retries each weekday for up to 5 days and emails you the last retry date. If the cash never arrives, the period is marked missed.

Missed periods are not made up later.

Read the full guide: How recurring investments work

How much do I need to start?

Short answer

It depends on your smallest weight. Public needs $5 per fractional order, so a 10% holding needs at least $50. Walnut warns you at setup.

Plans run from $5 to $100,000 a period. A Robinhood Agentic account has a $1 floor per order.

$5

Public's minimum per fractional order

5 days

How long a short-cash buy retries

1

Buy per period, never more

Read the full guide: How much do I need to start investing?

Quick answers

Which brokers does it work with?
Public, a Robinhood Agentic account, E*Trade, tastytrade, Webull (US and Canada), moomoo, Questrade, Wealthsimple, Trading 212 and Stake.
Can I test it before the first buy?
Yes. The Test button runs every check and buys nothing.
Can I pause or stop it?
Yes. Pause, resume or cancel it any time.
What if the market is closed that day?
On a market holiday the order waits at your broker until it fills.
How often can it run?
Every week, every two weeks, or monthly on a day of the month you pick.

Keep reading

Best ETFs for dollar-cost averagingFunds that suit a monthly habitWhat is dollar-cost averaging?Investing the same amount on a scheduleAre fractional shares safe?What you own when a buy is a sliceHow to invest with little moneyStarting small and adding each month

Will my plan work?

Run a test that buys nothing.

Set up a plan

Walnut is an AI financial advisor app; it is not a registered investment adviser. Nothing here is a recommendation to buy or sell a security. Examples on this page are samples, not real accounts.

Set it once. Let the habit do the work.

Change or pause it any time.

Set up a recurring buy