Yes, you can link them, but the connection depends on your bank and what you want to do

Most banks let you link a money market account to a business checking account so money can move between them. The link is usually set up during account opening or through your online banking dashboard. However, the mechanics vary: some banks treat them as separate accounts that can transfer to each other, while others let you sweep funds automatically between them. A few banks require the accounts to be at the same institution; others let you link accounts across different banks using ACH transfers or external account connections.

Before you set up the link, confirm with your bank whether they charge fees for transfers between the two accounts. Some banks offer unlimited free transfers between their own accounts; others charge per transfer or limit how many you can make per month. The speed of the transfer also matters—internal transfers between accounts at the same bank usually clear within one business day, while ACH transfers between different banks take two to three business days.

Key Takeaways

  • Most banks allow you to link a money market account and business checking account, but you need both accounts at the same institution or use ACH transfers if they are at different banks.
  • Internal transfers between your own accounts at the same bank are usually free and clear within one business day, while ACH transfers between different banks take two to three business days and may have fees.
  • Some banks offer automatic sweep features that move money between accounts based on rules you set, such as moving excess funds to savings when your checking balance exceeds a threshold.
  • Check your bank's fee schedule and transfer limits before linking, because some banks charge per transfer or cap the number of free transfers per month.

How to link accounts at the same bank

If both accounts are at the same bank, linking is usually straightforward. Log into your online banking portal, find the option to add a linked account or manage transfers, and select your money market account from the list of your own accounts. The bank typically displays both accounts and lets you name them for easy identification. Once linked, you can transfer money between them on demand through the same portal or mobile app.

Some banks also offer automatic sweep arrangements for business accounts. This means you can set a rule—for example, "if my checking balance drops below $5,000, transfer $10,000 from my money market account"—and the bank executes the transfer automatically. Sweep features are useful if you want to keep a minimum balance in checking for operations while keeping most cash in the money market account to earn interest. Ask your bank whether sweep is available for your account type and whether it costs extra.

Linking accounts at different banks

If your money market account and business checking account are at different banks, you can still link them using ACH (Automated Clearing House) transfers. To do this, you typically add the external account through your primary bank's online portal by entering the account number and routing number of the other bank. The bank may require you to verify the account by depositing small test amounts (usually under $1 each) and confirming the amounts in your external account statement.

Once verified, you can initiate transfers from your primary account to the external account, or vice versa, depending on what your bank allows. ACH transfers take two to three business days to complete. Some banks limit how many ACH transfers you can make per month or charge a fee per transfer, so check your fee schedule. If you need faster movement of money between banks, ask whether your bank offers wire transfers, which typically clear the same day but cost more—usually $15 to $30 per wire.

What happens when you transfer money between the accounts

When you move money from your business checking to your money market account, the funds leave your checking balance immediately (or at the end of the business day, depending on when you initiated the transfer). The money market account receives the deposit and usually begins earning interest the next business day. The reverse is true when you move money from the money market account back to checking—it leaves the money market account and arrives in checking within one business day for internal transfers.

Keep track of these transfers for accounting purposes. Each transfer is a separate transaction and should be recorded in your business books. If you use accounting software, you may need to categorize transfers as internal movements rather than expenses or income. Some accountants recommend keeping a simple log of sweep transfers if your bank performs them automatically, so you have a record of when and how much moved.

Fees and limits you should know about

Banks vary widely in what they charge for transfers. Some offer unlimited free transfers between your own accounts; others cap free transfers at a certain number per month (commonly 6 or 10) and charge $1 to $3 for each transfer beyond that. A few banks charge a flat monthly fee for linking accounts or using sweep features. Wire transfers, if you use them, typically cost $15 to $30 per wire and may be charged by both the sending and receiving bank.

Regulation D, a federal rule, historically limited certain types of transfers from savings and money market accounts to six per month. Most banks have relaxed this rule in recent years, but some still enforce limits on certain transfer types—particularly automatic transfers or transfers initiated through third-party services. Check your account agreement or call your bank to confirm what limits apply to your specific accounts and transfer methods.

Setting up automatic transfers or sweeps

If your bank offers automatic sweep, you can set it up through your online banking portal by specifying a trigger amount and a transfer amount. For example, you might say: "When my checking balance falls below $3,000, transfer $5,000 from my money market account." The bank then monitors your balance and executes the transfer automatically when the condition is met. This keeps your checking account funded for operations while maximizing the interest earned on your money market balance.

You can also schedule one-time or recurring transfers without using sweep. For instance, you might schedule a transfer every Friday to move a fixed amount from checking to your money market account. This works well if you have predictable cash flow and want to automate savings. Both sweep and scheduled transfers can be paused or changed at any time through your online portal.

What to do if a transfer fails or takes too long

If an internal transfer between accounts at the same bank does not appear within one business day, contact your bank's customer service line. Provide the date and time you initiated the transfer, the amount, and the account numbers involved. The bank can trace the transfer and tell you whether it is still processing or if an error occurred. Most banks resolve these issues within one to two business days.

For ACH transfers between different banks, delays are more common. If a transfer has not arrived after three business days, check your sending bank's portal to confirm the transfer was actually sent—sometimes a transfer request fails silently if there is a mismatch in account numbers or routing numbers. If it was sent, contact your sending bank and provide the ACH trace number (usually visible in your transaction history). The bank can file a trace to locate the transfer. If the money was sent to the wrong account due to an error on your part, recovery is difficult and may require the receiving bank's cooperation.

Frequently Asked Questions

Do I need both accounts at the same bank to link them?

No. If they are at the same bank, linking is simpler and transfers are usually free and fast. If they are at different banks, you can link them using ACH transfers, which take two to three business days and may have fees. Wire transfers are faster but more expensive.

Will linking my money market account to my checking account affect my interest rate?

No. Linking does not change the interest rate on your money market account. The rate is set by your bank based on the account terms and your balance, regardless of whether the account is linked to another account.

Can I set up automatic transfers so money moves between the accounts without me doing anything?

Yes, if your bank offers sweep features. You can set rules like "transfer $5,000 from my money market account to checking when the checking balance drops below $2,000." Not all banks offer this for business accounts, so ask your bank whether it is available.

What if I accidentally transfer money to the wrong account?

If you transferred to the wrong account at the same bank, contact your bank immediately—they can often reverse the transfer quickly. If you transferred to an external account at a different bank, recovery is harder. You would need to contact the receiving bank and ask them to reverse the transfer, which requires their cooperation.

Are there limits on how many times I can transfer between the accounts per month?

It depends on your bank. Some offer unlimited free transfers between your own accounts. Others cap free transfers at 6 or 10 per month and charge for transfers beyond that. Check your account agreement or contact your bank to confirm the limits on your accounts.