How Many Bank Accounts Does a Small Business Need?

Four. A fifth if you collect sales tax.

Not four because more is better. Four because each one answers a question you would otherwise have to work out, and working it out is the job that never gets done.

One account means every question starts with an hour of sorting. Four means you can answer most of them by looking.

The Money Mastery System dashboard showing accounts side by side. Example data.

The short version

• Four accounts: operating, tax set-aside, owner pay and buffer. A fifth for sales tax if you collect it.

• The set-aside account is the one that makes your balance true.

• Open them one at a time, starting with tax.

• A sole proprietor is generally not required to have a business account, but one that is only ever business is half your bookkeeping.

The four, and what each is for

Account	What goes in	What comes out	What breaks without it
Operating	Everything clients pay you	Everything the business spends	Nothing, this is the one everyone has
Tax set-aside	A fixed share of every payment, on the day it lands	Tax payments, and nothing else, ever	The balance lies to you all year and April is a shock
Owner pay	A regular amount you decide in advance	Your own life	You pay yourself whatever is left, which is a different number every month
Buffer	Whatever is spare, monthly	A quiet month, a broken thing, a late client	One late invoice becomes a personal loan
Sales tax, if you collect it	The tax portion of every sale	The filing, when due	You spend money that was never yours

Why the set-aside account does the most work

Every other account on that list is organisation. The set-aside is the one that changes what you can see.

With one account, your balance is your money plus the tax money plus the client deposit you have not earned yet. You cannot tell them apart by looking, so every decision about whether you can afford something is a guess.

Move the tax out on the day the money arrives and the operating balance becomes true. That single change is worth more than the other three together.

Do you need a business account legally?

A sole proprietor generally is not required to have one. An LLC or a corporation effectively is, because mixing personal and business money undermines the separation the structure exists to give you.

But the practical answer is stronger than the legal one: one account that is only ever business turns your statement into half your bookkeeping.

The categorization screen showing transactions by account. Example data.

Setting them up without it becoming a project

1. Open the tax set-aside account first. It is the one that pays for itself fastest.

2. Automate the transfer if your bank will do it. A percentage on every deposit.

3. Add owner pay next, on a fixed day.

4. Leave the buffer until the first three are habits.

Four accounts opened in one afternoon and ignored is worse than one account opened this week and used.

What a month looks like with four accounts

Say $6,000 arrives from clients in a month, in five payments. Each payment lands in operating. The same day, 25% of it moves to the tax set-aside, which makes $1,500 by the end of the month.

On the 1st and the 15th, a fixed $1,400 goes to owner pay, which is $2,800. Business costs of $1,300 leave operating through the month. What is left, $400, moves to the buffer on the last day.

Nothing in that month needed a decision. The percentage and the paydays were decided once, and the month simply followed them. The figures are an example. Yours come from your own profit and your own tax position.

How much belongs in the buffer

Enough to cover the gap between a slow month and your fixed costs. A simple way to size it is to add up what the business must pay every month whatever happens, and use two to three months of that figure as a starting target.

Build it from what is spare, never from the set-aside, and stop when you reach the target. A buffer that keeps growing is money that could be paying you.

See all four in one place, free

Four accounts are only an improvement if you can still see the whole picture. La Soglia, the free membership of the Money Mastery System, holds more than 60 account types with personal and business together, so splitting your money does not mean losing sight of it. Free, no bank connection, no card. The Money Mastery Collective comes with it.

Bring it to the Collective

Which bank, which account, and whether the fees are worth it is a question the feed answers better than any article can, because the answer is local. The discussion feed is open on the free membership.

Questions we hear

Can I use a savings account for the set-aside?

Yes, and it is better if it pays interest and is slightly awkward to reach.

What if my bank charges for multiple accounts?

Compare the fee against one missed tax deadline. It is usually not close. If it is, move banks.

Do I need a separate account for each client?

No. That is a spreadsheet problem, not a banking one.

Should owner pay go to my personal account?

Yes. Owner pay is the bridge between the business and your own life, so it leaves the business on a set day and arrives in your personal account.

What percentage should go to the tax account?

Your own, worked out from your profit and your household's tax position. Our post on setting your tax set-aside percentage walks through it.

Start free with La Soglia

La Soglia is the free membership of the Money Mastery System. It gives you the Net Worth Tracker, where everything you own and everything you owe sits in one place, and the Money Mastery Collective. There is no card to enter and no bank connection.

Start free with La Soglia

Keep in touch

Donna shares a short version of posts like this one on Instagram and LinkedIn. Follow along there, or find everything in one place on our links page.

A note on what this is

This article is educational. The Money Mastery System is an educational tool, not financial software, and nothing here is legal, tax, investment or financial advice. Whether your structure requires a separate account depends on your entity and your state. For guidance on your own circumstances, please speak with a qualified professional who knows them.

Home Based Business Bookkeeping: A One-Page Checklist

A business run from home keeps the same records as any other business, plus proof of the part of the home it uses. That second part is the only thing that makes it different.

Search for home based business bookkeeping and most of what comes back is about starting a bookkeeping business. This is the other thing: how to keep the books for the business you already run from your spare room.

Here is the whole job as one checklist, eighteen items, sorted by how often each comes round.

A year of records, ready when someone asks for them. Example data.

The short version

• Weekly: capture receipts while you still remember what they were for.

• Monthly: record, label and read. This is where most of the work is.

• Quarterly: check your tax set-aside and your home costs.

• Yearly: measure the workspace once and keep the number.

Every week: three things

Do this	Why
Photograph every business receipt	A statement shows where you paid, not what you bought
Note the business purpose on anything that could look personal	In April you will not remember
Log any business mileage	It cannot be rebuilt honestly later, only estimated

Every month: six things

Do this	Why
Bring in the statement for every account and card	One place for every transaction
Give each transaction a category	A list becomes income, expenses and profit
Mark transfers between your own accounts	They are not income
Mark credit card payments	The purchases were already counted
Split bills that are part home, part business	Internet and phone are the usual ones
Read income, expenses and profit	This is what the rest was for

The fifth row is the one that belongs to a home business. An office in a rented unit has its own bills. Yours shares them with your household, so each shared bill needs dividing the same way every month.

One bill, two purposes, each part in its own category. Example data.

Every quarter: four things

Do this	Why
Compare profit to date with your tax set-aside	So the estimated payment is already there
Total your shared home costs for the quarter	Rent or mortgage interest, utilities, insurance
Check that the same share was used each month	A share that drifts is hard to defend
Look at which category grew fastest	It is usually the one to ask about

Every year: five things

Do this	Why
Measure the workspace and the whole home, in square feet	Both methods start from this number
Keep a dated photo of the workspace	It shows the space is used the way you say
List equipment bought, with dates and receipts	Larger purchases are treated differently from supplies
Run the year-end reports	Totals by category for the return
Hand your accountant totals, not a folder	Their time is better spent on advice

The home office rule, in plain words

The IRS allows a deduction for the business use of part of your home only if that part is used exclusively and on a regular basis for business. Both words matter. A desk in the corner of the living room where the family also eats does not pass the first one.

There are two ways to work it out.

Method	How it works	What to keep
Simplified	$5 per square foot of the space used for business, up to 300 square feet	The measurement, and proof the space is used regularly and only for work
Regular	The business share of your actual home costs	The measurement, plus the bills themselves for the whole year

The simplified method tops out at 300 square feet, so the most it can come to is $1,500 a year. A 120 square foot office comes to $600. There is no depreciation to work out under it.

The regular method can come to more, and asks for more records. Which is better for you depends on your home and your costs, and is a question for whoever prepares your return. Either way, the checklist above is what makes both possible.

Three home business mistakes

1. One account for everything. Every question then starts with an hour of sorting. A separate account that is only ever business turns your statement into half your bookkeeping.

2. Guessing the share each month. Decide the business share of each shared bill once, write down how you got it, and use it every month.

3. Measuring in April. Measure once, at the start, and keep the figure where you will find it.

See the whole picture free

When home and business share a roof, they share a balance sheet too. La Soglia, the free membership of the Money Mastery System, holds everything you own and owe in one place, personal and business together, with no bank connection and no card.

The monthly rows of this checklist, the upload, the categories, the splits and the reports, are the paid membership, and Clarity remembers how you sorted something last time.

Bring it to the Collective

How other owners divide their internet bill is exactly the kind of thing the discussion feed is good for. The Money Mastery Collective is open on the free membership.

Questions we hear

What records does a home-based business need to keep?

The same as any business: what came in, what it cost to run, and what it owns, each backed by a statement or receipt. On top of that, the size of the workspace and the home costs it shares.

Can I deduct my home office?

Only if the space is used exclusively and on a regular basis for business. Whether you qualify, and which method suits you, is a question for whoever prepares your return.

What is the simplified home office method?

It is $5 per square foot of the space used for business, up to 300 square feet, so a maximum of $1,500 a year.

Do I need a separate bank account?

A sole proprietor is generally not required to have one. It is still the single thing that saves the most time.

References

The exclusive and regular use requirement and the simplified method figures are from the IRS page Simplified option for home office deduction, updated 2 March 2026, and IRS Publication 587, Business Use of Your Home. Recordkeeping follows IRS Publication 583.

Related guides: How to do your own bookkeeping, step by step · Where does my money go? A simple money tracker.

Start free with La Soglia

La Soglia is the free membership of the Money Mastery System. It gives you the Net Worth Tracker, where everything you own and everything you owe sits in one place, and the Money Mastery Collective. There is no card to enter and no bank connection.

Start free with La Soglia

Keep in touch

Donna shares a short version of posts like this one on Instagram and LinkedIn. Follow along there, or find everything in one place on our links page.

A note on what this is

This article is educational. The Money Mastery System is an educational tool, not financial software, and nothing here is legal, tax, investment or financial advice. Home office rules have conditions and exceptions that are not covered here, and tax rules change. For guidance on your own circumstances, please speak with a qualified professional who knows them.

Setting Up a Money System You Will Actually Maintain

Twenty minutes a week. That is what it takes to do your own bookkeeping at home, and we timed every piece of it to be sure.

Almost every article about this tells you to stay on top of your books and then stops. Nobody says how long it takes, so you imagine an afternoon, and an afternoon is easy to put off until it becomes a weekend, and then a quarter.

The reason systems fail is almost never discipline. It is that nobody ever costed the job, so it stayed the size of your dread instead of the size it really is.

The whole job, timed

What you do	When	Minutes	What breaks if you skip it
Categorize the week's transactions	Weekly	8	Everything downstream. This is the one that matters
Photograph receipts over $75	As it happens	2	A deduction you cannot evidence is one you do not get
Move the tax set-aside across	Weekly	2	January arrives and the money has been spent twice
Check nothing is uncategorized	Weekly	3	Your reports quietly understate both sides
Reconcile against the bank balance	Monthly	5	Errors compound. Catch them inside 30 days
Note anything unusual while you remember it	As it happens	1	In March you will not remember what that $340 was
Check what repeats	Monthly	2	Subscriptions you stopped using in 2024
Look at the month before closing it	Monthly	4	You never learn anything from numbers you do not read

The weekly items come to fifteen minutes. The monthly ones add about eleven, spread across four weeks. Call it twenty minutes a week and you have a margin.

Why this works when a spreadsheet did not

A spreadsheet asks you to remember. A system asks you to recognize.

That is the real difference, and it is why the same person who abandoned three spreadsheets can hold a system for a year. Recognizing a charge you made on Tuesday takes a second. Reconstructing it in April takes ten minutes and a bank statement.

Everything below is built on doing the small thing while it is still small.

The order to set it up in

1. One account for the business. Not a perfect structure. One account, so the sorting job halves on day one.

2. Decide your categories once. Fewer than you think. Most people use about twenty and the rest is decoration.

3. Pick the twenty minutes. A named slot in the week, not \"when I get a chance\". Friday before you close up works because the week is still in your head.

4. Do the first catch-up in one sitting. However far behind you are, it is one job, once. Do not do it weekly and catch up at the same time.

5. Set the tax aside on the day money arrives. Not monthly. The day.

The part people get wrong

They start with the reports.

Reports are the reward, not the work. If the sorting is not happening weekly, a better report changes nothing, because the report is only as true as the last twenty minutes you spent.

Start with the twenty minutes. The reports build themselves.

Do it with the free version

You do not need to buy anything to start. The free Money Mastery Net Worth Tracker holds what you own and what you owe, personal and business together, with no bank connection. It is free and it stays free.

When the sorting is the part eating your week, that is what the Money Mastery System is for. Clarity remembers how you sorted something last time and suggests it the next, which is most of where the twenty minutes comes from.

Questions we hear

I am nine months behind. Where do I start? With this week, not with January. Get the current week clean so the pile stops growing, then do the backlog in one sitting or one month at a time. Starting at the oldest month is how people give up.

Do I need separate business and personal accounts? It makes the job about half as long, so it is worth doing even though it is not legally required for a sole proprietor. If you cannot yet, the Money Mastery System keeps both sides apart inside one place.

What if I miss a week? You do the next one. Two weeks is thirty minutes, not a crisis. The system only fails when missing becomes the normal state and nobody notices.

Is twenty minutes really enough? For most one person businesses, yes, once you are current. Getting current is the part that takes longer, and it happens once.

Bring it to the Collective

The hardest part of a new system is the first month. The Money Mastery Collective has a discussion feed open to free members, and it is a good place to say you are starting and be asked about it in three weeks.

A note on what this is

This article is educational. The Money Mastery System is an educational tool, not financial software, and nothing here is legal, tax, investment or financial advice. Nothing here is a substitute for advice on your own records or tax position. For guidance on your own circumstances, please speak with a qualified professional who knows them.