My first year of side hustling, I kept everything in one Chase checking account. Business income, personal expenses, tax money, and grocery runs — all swimming in the same pool. When quarterly tax time hit, I had to scroll through three months of transactions trying to figure out how much was business income and how much I owed. I guessed wrong. The IRS disagreed with my guess to the tune of $1,800 in underpayment penalties.

That penalty taught me two things. First, quarterly estimated taxes are not optional. Second, I needed a way to separate my money before I spent it. Not just separate business from personal — that's basic — but separate the tax money from the spending money within the business account itself.

That's what Relay does. And after using it for over two years now, it's the single tool that has saved me the most stress as a side hustler. Not the most money — that's probably QuickBooks Self-Employed or Keeper Tax. But the most stress, by a wide margin.

30-Second Verdict

Rating: 4.3 / 5

Relay is a free business bank account built around one feature that no other free option does as well: multiple sub-accounts with separate account numbers and debit cards. For side hustlers who want to automate a profit-first budgeting system — tax savings in one bucket, operating expenses in another, owner's pay in a third — Relay makes that dead simple at $0/month. The trade-offs are real: no branches, no cash deposits, no interest on balances. If those matter to your business, Relay isn't the right fit. If they don't, it's the best free business bank account I've found.

The Sub-Account System

This is the reason Relay exists, and it's the reason I use it over every other free business bank account.

Relay lets you create up to 20 separate checking accounts under one business. Each account gets its own account number. Each can have its own debit card. Transfers between accounts are instant. And all of this is on the free plan.

Most business bank accounts — Chase, Bank of America, Wells Fargo — give you one checking account. Maybe a savings account too. If you want to separate your money into different buckets, you're doing it mentally or in a spreadsheet. Some banks offer "envelopes" or "savings goals," but those are sub-categories within one account, not separate accounts with their own routing information.

Relay's sub-accounts are real checking accounts. When I set up automatic transfers from my main account to my Tax Savings account, that money moves into a separate account with a separate balance. I can't accidentally spend it because it's not in my operating account. The debit card attached to my operating account can't access it. That separation is what makes it work for someone like me who, left to my own discipline, would absolutely spend money earmarked for taxes.

My Tax Savings Setup

Here's exactly how I have Relay configured, because I think the specific setup is more useful than abstract explanations.

I have five accounts:

The flow works like this: a client pays me $2,000. It hits Incoming. Within 24 hours, I transfer $600 to Tax Savings (30%), $200 to Operating (estimated monthly expenses divided by expected payments), and $1,200 to Owner's Pay. The percentages aren't exact science — I adjusted them over the first few months based on actual spending patterns.

When quarterly estimated taxes come due, I open the Tax Savings account, see the balance, and transfer it to the IRS via EFTPS. Last quarter that was $4,127. No math, no panic, no scrambling to figure out how much I can afford to pay. The money was already there because I never mixed it with spending money in the first place.

I keep 30% in Tax Savings because my effective combined tax rate (federal income tax + self-employment tax) works out to about 28% on my side hustle income. The extra 2% cushion means I usually have a small surplus in Tax Savings at the end of the year, which is a much better problem than a shortfall. If your income is lower, 25% might be enough. If you're in a higher bracket or live in a state with income tax, you might need 35%.

The one thing that changed for me

Before Relay, quarterly tax time was a source of anxiety. I'd look at my bank balance, subtract what I thought I needed for expenses, and hope the remainder was enough for the IRS. It usually wasn't. Now it's a 2-minute transfer. The sub-account system didn't change my income or my tax rate — it changed the experience of paying taxes from stressful to boring. And boring is exactly what you want your finances to be.

What Daily Banking Looks Like

The app is solid. I check Relay most mornings — takes about 90 seconds. I see each account balance on the home screen, can tap into any account for transaction history, and initiate transfers between accounts with two taps. The interface is clean and fast. No ads, no upsells, no "have you considered our premium plan" banners.

Transfers between Relay accounts are instant. Outgoing ACH transfers to external accounts take 1-3 business days on the free plan. If you need faster external transfers, the Pro plan ($30/month) includes same-day ACH, which I haven't found necessary but I could see mattering for someone who needs to pay contractors quickly.

Each sub-account can have its own Visa debit card, and you can freeze/unfreeze cards from the app. I have a debit card on my Operating account that I use for business purchases. My other accounts don't have debit cards at all, which is intentional — I don't want a way to spend from Tax Savings on impulse.

Relay connects to QuickBooks Self-Employed, Xero, FreshBooks, and other accounting software via Plaid. The connection has been stable for me over two years with QBSE. I did have one incident about eight months ago where the Plaid connection dropped and I had to re-authenticate, but that was a Plaid issue, not a Relay issue, and it took about 3 minutes to fix.

Bill pay is available but basic. You can schedule one-time or recurring payments to vendors using their account and routing numbers. There's no invoice processing or smart bill-pay features. For paying recurring expenses like software subscriptions, it works fine. For anything more complex, you're using the debit card or an external payment method.

What Relay Doesn't Do

No branches. No cash deposits. This is the dealbreaker for some businesses. If you run a food truck, a lawn care service, or anything else that takes cash payments, you cannot deposit that cash into Relay. There's no ATM deposit option, no branch to walk into, no cash deposit network partnership. Your cash has to go through a traditional bank first and then get transferred to Relay electronically. For my freelance business, this doesn't matter — all my income arrives via ACH or direct deposit. But I know plenty of side hustlers who handle cash regularly, and Relay doesn't work for them.

No interest on balances. Your money sits in Relay earning 0%. My Tax Savings account typically holds $4,000-6,000 between quarterly payments. At a high-yield savings rate of 4.5%, that's roughly $200-270/year in interest I'm leaving on the table. It's not a huge amount, but it's not zero, especially if your balances are higher. Competitors like Bluevine offer business checking accounts with 2%+ APY, though they don't have Relay's sub-account system. Novo offers checking accounts with APY through a savings reserve feature, but again, different implementation than true sub-accounts.

No physical checks. Relay doesn't offer a checkbook. If you need to write checks — and some landlords, government agencies, and vendors still require them — you'll need another account. This hasn't affected me since I went fully digital, but it's a limitation worth knowing about.

Customer support is email and chat only. No phone line. The chat is responsive during business hours — I've had questions answered in under 10 minutes — but if you want to call someone when something goes wrong with your money, Relay doesn't offer that. For a company holding your business funds, the lack of phone support is my biggest gripe. When my Plaid connection dropped and transactions weren't syncing, I wanted to talk to a human immediately, not wait for a chat response.

Who Relay Is Built For

Relay makes the most sense if your business operates almost entirely digitally. Freelancers, consultants, content creators, online sellers, gig workers who get paid through apps — if your income arrives electronically and your expenses go out electronically, Relay has no real gaps.

It's especially good for anyone who's read Profit First by Mike Michalowicz or follows any kind of envelope budgeting system for their business. The sub-account structure was clearly designed with that methodology in mind, and it removes the main friction of implementing it — most banks charge you for additional accounts, or make it cumbersome to create them. Relay makes it free and takes about 30 seconds per account.

It's also the right choice if you've had the experience I had — where tax time reveals that the money you thought was available was actually spoken for. If you struggle with the discipline of mentally earmarking money while it all sits in one visible balance, Relay's physical separation of funds solves that problem better than any budgeting app I've tried. Budgeting apps tell you what you should have set aside. Relay actually sets it aside.

It's the wrong choice if you deal in cash, need physical branches, want to earn interest on balances, or prefer having phone support for your bank. Those aren't minor limitations — they're fundamental to how Relay operates as an online-only, no-fee platform. The free pricing is made possible in part by not having branches and not paying interest. You're trading those features for the sub-account system.

Final Take

Two years in, Relay is the one financial tool I'd be most reluctant to give up. Not because it does anything flashy — it's a bank account, the bar for excitement is low — but because the sub-account system fundamentally changed my relationship with business income. Money that used to feel like "my balance" now feels like it's already sorted: some for the IRS, some for operations, some for me.

Quarterly tax payments used to be the most stressful moment of my financial quarter. Now they're a 2-minute transfer from an account that's been accumulating the right amount all along. That shift — from anxiety to routine — is worth more to me than the interest I'm giving up by not using a higher-yield account.

If your side hustle income is digital, if you want to separate your money into purpose-driven buckets, and if you can live without branches and phone support, Relay is the best free business bank account available. Not the flashiest, not the one with the best marketing, but the one that actually solves the problem most side hustlers have: knowing how much of their money is really theirs to spend.

Bruce Samuels

Bruce Samuels

Personal Finance Writer

Bruce has been a Relay customer since 2024 and uses it as his primary business bank account for three income streams. He's based in DeSoto, Texas, and is not affiliated with Relay — he just really likes the sub-accounts.

Frequently Asked Questions

Is Relay a real bank?

Relay is a financial technology company, not a chartered bank. Your deposits are held by Thread Bank, which is FDIC insured. Your money is protected up to $250,000. Relay provides the interface and features; Thread Bank provides the banking charter and deposit insurance.

Does Relay charge monthly fees?

No. The standard plan is free — no monthly fees, no minimum balance, no per-transaction charges. The Pro plan at $30/month adds same-day ACH and higher transfer limits, but most side hustlers won't need it.

Can I deposit cash with Relay?

No. Relay is online-only with no cash deposit option. If your business handles cash, you need a traditional bank account with branch access. You could deposit cash at a traditional bank and transfer it to Relay electronically, but that adds a step.

How many sub-accounts can I create?

Up to 20 checking accounts per business on the free plan. Each gets its own account number and can have its own debit card. I use 5 and haven't needed more.

Does Relay pay interest on balances?

No. Relay checking accounts earn 0% interest. If you're holding significant balances, you might want to pair Relay with a high-yield savings account at another institution. For me, the sub-account convenience outweighs the ~$200/year in interest I'd earn elsewhere, but that math might be different for you.

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For the broader comparison: Mercury vs Relay vs Bluevine vs Novo 2026 — four neobank business accounts side by side.

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