Business Savings Account: Where to Keep Tax Money
How to use a business savings account for tax money: how much to set aside, where to keep it, FDIC limits, taxes on interest and a simple invoice system.
A business savings account for tax money is the simplest fix for the most common self-employed money problem: spending cash that is really owed to the IRS. Open a separate savings account, move a fixed share of every client payment into it the day it arrives (often 25% to 30% of profit), and pay quarterly estimated taxes from it. Choose an FDIC-insured account with no monthly fee, easy transfers to your checking account and a competitive interest rate.
This guide covers how much to set aside, where to keep it, how interest is taxed, FDIC limits, and a step-by-step system that ties savings to your invoices. It is general information, not tax advice; a tax professional can tailor percentages to your situation.
Why a separate account for tax money works
When income arrives in irregular chunks, a checking balance feels like spendable money. By April it is not. Self-employed people pay income tax plus self-employment tax of 15.3% on most net earnings, and nobody withholds it for them. A separate account turns tax from a surprise into a bill that is already paid for. It also pairs naturally with methods like Profit First, where every deposit is split into accounts by purpose.
How much to set aside for taxes
Our detailed guide on how much to set aside for taxes walks through the calculation. As a starting point:
| Situation | Typical set-aside (of net profit) | Notes |
|---|---|---|
| Low profit, no state income tax | 20% to 25% | Self-employment tax is still due |
| Moderate profit, average state tax | 25% to 30% | Common default for freelancers |
| High profit or high-tax state | 30% to 40% | Higher brackets and state tax |
| S corporation owner on payroll | Lower on distributions | Withholding on salary covers part; see a professional |
If you only track gross deposits, a simple rule is to move a percentage of every payment and adjust quarterly once you know your expenses. Our explainer on self-employment tax shows how that 15.3% is calculated.
Where to keep your tax money
| Option | Interest | Access | Best for |
|---|---|---|---|
| Savings account at your main bank | Often low | Instant transfers | Simplicity |
| High-yield online business savings | Higher, variable | 1 to 2 business days | Most freelancers |
| Fintech sub-account (e.g. Relay, Bluevine) | Varies by plan | Instant within the platform | Profit First style budgeting |
| Money market account | Often higher on larger balances | Limited transactions | Larger balances |
| Short Treasury bills | Market rate; state tax exempt | At maturity, or sell via broker | Timed to tax deadlines |
For a side-by-side of popular online options, see Mercury vs Relay vs Bluevine. For example, Relay's pricing page listed savings APYs from 1.19% to 3.21% depending on plan in late 2026, while Bluevine paid interest directly on checking. If you hold several months of tax money, timing Treasury bills for business to each deadline can add yield.
Features to look for
- No monthly fee or minimum balance you might miss.
- FDIC insurance (or NCUA at a credit union).
- Free, fast transfers to your operating account.
- Nicknamed sub-accounts, so "Tax" is labelled clearly.
- Ability to pay the IRS from it, or move money a few days before deadlines.
FDIC coverage and business accounts
FDIC insurance covers $250,000 per depositor, per insured bank, per ownership category. An LLC or corporation is its own depositor, separate from your personal accounts. A sole proprietorship account, however, is typically treated as the owner's individual funds and combined with personal accounts at the same bank. Fintech sweep programs spread balances across many banks to provide higher combined coverage, subject to pass-through conditions.
How interest on tax savings is taxed
Interest is taxable. Banks generally send Form 1099-INT when they pay $10 or more of interest in a year, but you report all of it regardless. For sole proprietors, interest on a business savings account is usually reported as interest income on the personal return, not as Schedule C revenue. Interest from Treasury bills is federally taxable but exempt from state and local income tax, as TreasuryDirect notes. Plan for a small tax on the interest itself when you estimate what you owe.
A simple system: link savings to every invoice
- Open the account and name it "Tax" (and optionally "Tax: State").
- Pick a percentage, for example 28% of each client payment.
- Record payments against invoices. When an invoice is paid, mark it paid and transfer the percentage the same day.
- Automate if possible. Some banks can auto-split incoming deposits.
- Pay quarterly estimated taxes from this account; see our guide to quarterly estimated taxes for freelancers for deadlines and methods.
- Reconcile each quarter. Compare the balance to your actual estimated liability and top up or reduce the percentage.
- After filing, any leftover becomes a cushion or moves to your business emergency fund.
Worked example: a freelancer's tax account
Illustrative figures for a freelance designer with no state income tax who sets aside 25% of every payment.
| Quarter | Invoices paid | Moved to tax savings (25%) | Estimated tax paid | Balance after payment |
|---|---|---|---|---|
| Q1 | $18,000 | $4,500 | $4,000 | $500 |
| Q2 | $22,000 | $5,500 | $4,800 | $1,200 |
| Q3 | $15,000 | $3,750 | $3,600 | $1,350 |
| Q4 | $25,000 | $6,250 | $5,200 | $2,400 |
At filing time, the designer has $2,400 left over to cover any balance due and the tax on interest earned. Because the money never sat in checking, there was no temptation to spend it, and no estimated tax penalty from missed quarters.
Common mistakes
- Saving from profit you have not calculated. If you do not track expenses, save from gross until you do.
- Using the tax account as an emergency fund. Keep a separate cushion.
- Forgetting state tax or local business taxes.
- Locking money up too long, for example in a CD that matures after a payment date.
- Not adjusting the percentage after a big income jump.
How to pay the IRS from your tax savings account
Most owners pay estimated taxes by moving money from the tax account to checking a few days before the deadline, then paying the IRS online. Options include IRS Direct Pay, EFTPS and your IRS online account; our guide on how to pay the IRS online compares them. Keep the confirmation number with your records, and note the payment in your books as an owner draw (for sole proprietors) or a tax payment, not a business expense, because federal income tax is not deductible.
Do not forget sales tax you collect
If you charge sales tax on invoices, that money was never yours. It belongs to the state and should be moved to a separate account, or the same tax account with a clear label, as soon as the client pays. Mixing collected sales tax with operating cash is one of the fastest ways small businesses fall behind. Our guide to sales tax on invoices in the US explains when you need to charge it.
What if you have not saved enough?
- Pay what you can by each deadline to limit penalties and interest on the shortfall.
- Raise the set-aside percentage for the rest of the year.
- Chase overdue invoices; unpaid client balances are often the real problem.
- Ask about an IRS payment plan if you cannot pay in full when you file.
- Review your safe harbor: paying enough based on last year's tax can avoid underpayment penalties even if this year's income is higher; ask a tax professional how it applies to you.
Business savings account vs personal savings for tax money
Sole proprietors can legally keep tax money in a personal savings account, but a business account keeps the trail cleaner and stops the money blending with household savings. For an LLC or corporation, keep it in the business's name so the entity's funds stay separate, which also supports your liability protection. Either way, the key is a separate account used only for taxes.
Choosing the right percentage: a quick check
At the end of each quarter, compare the tax account balance with a rough estimate: net profit so far, times your expected combined rate (federal, state and self-employment tax). If the account holds more than the estimate, you can lower your percentage slightly; if it holds less, raise it right away rather than waiting for April. Owners whose income swings a lot often keep a slightly higher percentage and treat any surplus as a head start on next year.
Should you use a CD or money market account?
A certificate of deposit can lock in a rate, but only use one if it matures before the payment it is meant for, because early withdrawal penalties can wipe out the interest. A money market account can pay more on larger balances while keeping access, though some limit monthly withdrawals. For most freelancers, a no-fee high-yield savings account is the simplest place for quarterly tax money, with longer-term options reserved for any surplus.
Summary
A dedicated business savings account, funded with a fixed share of every paid invoice, keeps tax money safe, earns some interest and makes quarterly payments painless. Choose an insured, fee-free account with easy transfers, review the percentage each quarter, and keep records that tie each transfer to an invoice. To make that easy, create numbered invoices with our free invoice generator, no sign-up needed, and download them as PDFs for your records.
Frequently asked questions
Should I keep tax money in a separate business savings account?
Yes, for most freelancers and small business owners. Keeping tax money in a separate account means you see only spendable cash in your checking account, which stops you from accidentally spending money that belongs to the IRS and your state. It also makes quarterly estimated payments easy, because the money is already set aside. Many owners transfer a fixed percentage of every client payment into the tax account as soon as it arrives.
How much should I put in my tax savings account?
A common starting point is 25% to 30% of net profit, adjusted for your federal bracket, state income tax and the 15.3% self-employment tax on most self-employment earnings. Owners in high-tax states or high brackets may need more, and those with low profits may need less. Use last year's return as a guide, recheck after each quarter, and see a tax professional if your income changes sharply.
Is interest on a business savings account taxable?
Yes. Interest earned is taxable income. For a sole proprietor or single-member LLC taxed as a disregarded entity, it is generally reported as interest income on your personal return rather than as business revenue on Schedule C. Banks generally issue Form 1099-INT when interest paid reaches $10 or more in a year, but you must report all interest even if no form arrives. Corporations report it on the corporate return.
Is my business savings account FDIC insured?
Deposits at FDIC-insured banks are covered up to $250,000 per depositor, per insured bank, per ownership category, and a business entity such as an LLC or corporation is insured separately from its owners. Sole proprietorship accounts are generally treated as the owner's individual funds, so they combine with your personal accounts at the same bank. Fintechs that sweep funds across several banks can offer higher combined coverage.
Can I keep tax money in Treasury bills instead?
You can, as long as maturities line up with your payment dates. Short Treasury bills, for example 4 or 13 weeks, can be timed to mature before each quarterly estimated tax deadline. They often yield more than many savings accounts, and the interest is exempt from state and local income tax. The trade-off is less flexibility: if you need the cash early you would have to sell before maturity through a brokerage.
Invoice Creator Editorial Team
Guides on invoicing, cash flow and small-business finance from Invoice Creator, operated by Next Software Development Company. Content is reviewed for accuracy against the fields our own invoice generator produces.
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