Amortization of startup costs: how to record what you spent before the business opened

Amortization of startup costs is what happens to pre-opening spending you cannot deduct all at once. You elect to deduct up to $5,000 in the year the business begins, and the balance comes off over 180 months. That is the return. In your books it is a different job, and the credit side of every one of those entries is owner's equity.

You paid the designer in April, off a personal card. The LLC had no bank account until June and you opened the doors on July 1. The money is real and the business owes it to you, and none of that exists anywhere until somebody makes an entry. This is the sequence that makes those entries, in the order they have to happen.

What amortization of startup costs does, and what it leaves undone

Amortization spreads a cost you already paid across future months on your tax return. Publication 334, the IRS's 2025 tax guide for small business, states the mechanism: the start-up costs not deducted currently can be amortized ratably over a 180-month period, and the period starts with the month you begin operating your active trade or business.

The first-year piece sits in front of that. Publication 583, revised December 2024, states that you can elect to deduct up to $5,000 of business start-up costs and up to $5,000 of organizational costs, and that each $5,000 deduction is reduced by the amount your start-up or organizational costs exceed $50,000. Two separate $5,000 allowances, two separate $50,000 tests, one 180-month period each for whatever is left.

Here is that arithmetic on an illustrative set of figures, for a business that opens on July 1 with $18,400 of start-up costs and $1,150 of organizational costs. Every number in this article is an example, not a finding about what a new business costs.

Notice what the smaller column does. Organizational costs under $5,000 never reach the amortization schedule at all, which is why a business can have a 180-month schedule for one category and nothing for the other.

What the numbers do not tell you is which account any of it sits in, or how a payment made in April from a card with your name on it becomes a line in a set of business books at all. That is the rest of this page.

The opening sequence, in six steps

Work through these in order. Steps 1 to 4 are the ones that get skipped, and every problem later in the year traces back to one of them.

1. List every payment you made before the doors opened. All of them, on every card and account, business or personal. Go back to the first thing you paid for that was about this business and not about deciding whether to have one. Bank and card statements are the source, not memory.

2. Fix the date the business began, and write down what evidences it. This one date decides which payments are pre-opening at all, which tax year the deduction lands in, and which month the 180 months start counting from.

3. Split the list three ways. Start-up costs, organizational costs, and things that are neither and have their own treatment. The table in the next section is the template.

4. Record the contribution. Each pre-opening payment you funded personally is a debit to whatever the cost turned out to be and a credit to owner's equity. Nothing here touches your business bank account, because in most cases there was not one yet.

5. Set the recurring amortization entry. One entry a month, starting with the month the business began, for the amortizable balance divided by 180.

6. Check the done state. The opening balance sheet balances, nothing pre-opening is sitting in an ordinary operating expense account, and every row on your classification table has a document behind it.

Steps 1 through 4 are a single afternoon and they are only available cheaply once. Reconstructing them in March of the following year means reading 11-month-old statements and guessing what a $340 charge was for.

Split the pile three ways: the classification template

Three piles, and the third one is where most of the confusion lives. Copy this table, put your own payments in it, and give every row an answer before you make a single entry.

Start-up costs, as Publication 583 defines them, are the expenses you incur before you actually begin business operations, and may include costs for advertising, travel, surveys and training. The statutory test has a second half that decides the hard cases: the amount has to be one that would be deductible in the year you paid it if you had paid it while already running the same business. Organizational costs are the costs of bringing the entity into existence rather than the business. Anything that is neither is governed by a different rule.

The laptop is the row people get wrong, and it is worth being precise about why. Buying a laptop for a business already operating is not something you deduct in the year you pay for it by default, so it fails the second half of the start-up test. It never enters the section 195 pile. It runs through the capitalization question instead, which is what the de minimis safe harbor decides and what your capitalization policy has to have said before the tax year started. Same for the espresso machine, the shelving and the van.

The other useful line here is between investigating and buying. Rev. Rul. 99-23, issued by the IRS in 1999, draws it: expenses in the course of a general search for or investigation of a business, relating to the decisions whether to purchase a business and which business to purchase, are investigatory costs. Once you have focused on acquiring one specific business, the expenses of attempting to acquire that one are capital in nature. Flights to look at four bakeries sit on one side of that line. The due diligence on the fourth one, after you decided it was the one, sits on the other.

The day your business begins is a fact your records have to be able to show

The boundary is the day the active trade or business begins, and everything before it is potentially a start-up cost while everything from that day on is an ordinary operating expense. It is not the date on your articles of organization, not the date your EIN came through, and not the date you opened the bank account. Those are all dates the entity started existing, which is a different event.

For amortization the unit is the month, not the day. Publication 334 puts the 180 months as beginning with the month you begin operating the active trade or business, so a business that opens on July 18 and a business that opens on July 2 both start counting from July and both get a full month of amortization in it.

So the bookkeeping job is to make that date evidenced rather than remembered. Pick the one that is true for your business and keep the document that shows it.

Keep whichever one applies with your bookkeeping records rather than in an email folder. It is doing more work than any other single document in your first year: it splits your costs into two treatments, sets the first month of a 180-month schedule, and answers the question your preparer will ask first.

The entry that gets a personal card payment into the business books

Every pre-opening payment you made personally is a contribution to the business. The credit goes to owner's equity, the same section of the balance sheet your draws will come out of later, and the debit goes to whatever the payment turned out to be when you classified it.

Take the $2,400 logo invoice, paid on April 12 from your own card, for a business that opens July 1.

That is the whole entry. No cash moves in the business books, because no business cash existed on April 12. What the entry records is that $2,400 of value went into the business, and that the business owes you $2,400 for it.

This is the mirror image of a draw. An owner's draw is a debit to equity and a credit to cash, and it is not an expense. A contribution runs the other way: a credit to equity, and it is not income. Most charts of accounts carry both, sitting next to each other in the equity section, and if yours has only one of them, the missing one is the reason your equity section reads as though you have taken money out and never put any in.

Skip the entry entirely and two things go wrong at once. The opening balance sheet is short by the whole amount of what you contributed, so it does not balance and no amount of reconciling the bank feed will fix it, because the transaction was never in a bank feed. And your equity is understated for as long as the business exists, which makes every later reading of what the business owes you wrong by the same figure.

What the debit side is depends on which basis your books are kept on, and the two book answers are genuinely different rather than a matter of preference.

FASB's Statement of Position 98-5, Reporting on the Costs of Start-Up Activities, requires costs of start-up activities and organization costs to be expensed as incurred, which is the third column. Small businesses more often keep books on the same basis their return uses, which is the second, and there the unamortized balance is carried as an asset and released month by month. Both are defensible and they produce different balance sheets, so the useful thing is knowing which one you are on before you make 40 entries in it. If you are opening something venture-backed or investor-facing and will be asked for GAAP statements, that decision is already made for you.

What the recurring amortization entry looks like, month by month

From the opening month on, one entry a month, for the amortizable balance divided by 180. On the illustrative figures above that is $13,400 over 180 months, or $74.44.

It hits amortization expense, not the operating category the original cost came from. The $2,400 of design work stopped being a marketing cost the moment it went into the start-up pile, and running the monthly release back through marketing would make your first year's marketing spend look like something it was not.

Two practical notes about the account itself. Give it its own line rather than folding it into depreciation, because they answer to different schedules and different code sections and you will want to see them apart. And use a contra account for the accumulated side rather than writing the asset down directly, so the original $13,400 stays visible for the 15 years this schedule runs. In year 11 nobody remembers what the balance started at, and the register is the only thing that does.

From the opening date forward, the same categories of spending become ordinary operating expenses again. The June advertising was a start-up cost and the August advertising is advertising, and which category each of those ordinary costs belongs in is a separate question you will now be answering every month.

On the return side, Publication 583, revised December 2024, asks you to keep supporting documents showing the amount paid and that the amount was for a business expense, naming canceled checks, account statements and credit card sales slips among them. For pre-opening spending that is doing extra work, because the card statement is often the only record that the payment happened at all and the only thing that dates it on the right side of your opening date.

Done means the opening balance sheet balances

There is a finish line here, which is unusual for bookkeeping work, and it is worth naming so you can stop. You are done when all six of these are true.

• The opening balance sheet balances. Assets equal liabilities plus equity on the day you opened, with no plug figure and no suspense account holding the difference.

• Total owner contributions equals the total of the pre-opening payments you funded personally. Add up your list from step 1 and compare it to the equity account. Two numbers, and they match or they do not.

• Nothing dated before your opening date sits in an ordinary operating expense account such as marketing, rent or software. Run a transaction report for the period before the open date and read which accounts it hits. It should be the three piles and nothing else.

• The classification table is filled in and every row has a document behind it. An invoice, a receipt, or the statement line if that is genuinely all that exists.

• The opening date is written down with the evidence that dates it, in your bookkeeping records rather than in your head.

• The amortization entry is scheduled, and its first month is the month the business began. Not the month you got round to setting it up.

If all six hold, the books are opened and the rest of the year is ordinary bookkeeping. If the first one does not hold, work backwards through the other five, because the plug figure is almost always a pre-opening payment nobody recorded.

Whether the first-year deduction and the amortization schedule end up on your own return the way they do here depends on your entity, your opening date and what your state does with the same costs, and that is worth twenty minutes with whoever files your return before your first year end rather than after it. What is not conditional is the bookkeeping. The entries above have to exist regardless of which way any of that goes.

Where do I report my business start-up costs?

Start-up costs reach the return in two places, and which two depends on your entity. The first-year deduction of up to $5,000 goes on your business return as a deduction: for a sole proprietor that is Schedule C, in the other-expenses section, described as start-up costs. The amortization of the remainder starts on Form 4562, Depreciation and Amortization. The Instructions for Form 4562, 2025 revision, say the form is filed if you have amortization of costs that begins during the tax year, and list business start-up expenditures under section 195, along with corporate organizational expenditures under section 248 and partnership organizational expenses under section 709, among the amortizable costs.

You file Form 4562 in the first year, when the amortization begins. In later years the annual amount carries on as a deduction on the business return without the form, unless you have other amortization or depreciation starting that year.

How does amortization work for startup costs?

Amortization spreads the start-up costs you did not deduct in year one evenly across 180 months. You divide the remaining balance by 180 and deduct that amount each month, beginning with the month the active trade or business begins. Publication 334, the IRS's 2025 tax guide for small business, states the period as 180 months beginning with the month you begin operating your active trade or business.

An illustration. A business opening on July 1 with $18,400 of start-up costs deducts $5,000 in the year it opens and amortizes the remaining $13,400 at $74.44 a month, which is $446.67 in the first year across July to December and $893.28 in each of the next 14 full years.

The 180 months are a fixed period, not a useful life you estimate. The only judgment in it is which month the business began.

When does my business officially start for tax purposes?

Your business begins for tax purposes on the day the active trade or business begins, which is the day it is actually operating rather than the day the entity was formed. Forming an LLC, getting an EIN and opening a bank account are all steps toward it and none of them is it.

That date matters three times over. It is the line that separates start-up costs from ordinary operating expenses. It sets the tax year in which the first-year deduction and the amortization both start. And the month it falls in is month one of the 180.

What evidences it is a document rather than a decision. A first sale, a first invoice for work you were ready to perform, or a rental property advertised and available to rent all produce something dated. Keep that document with your bookkeeping records. The costs of deciding whether to be in business at all sit before it: Rev. Rul. 99-23, issued by the IRS in 1999, treats expenses in the course of a general search for or investigation of a business, relating to whether to purchase a business and which business to purchase, as investigatory costs.

What is the difference between startup costs and organizational costs?

Start-up costs are the costs of getting the business ready to operate. Organizational costs are the costs of bringing the legal entity into existence. The designer, the pre-opening rent, the training and the launch advertising are start-up costs. The state filing fee and the attorney's fee for the operating agreement or the articles are organizational costs.

They are counted separately and they get separate allowances. Publication 583, revised December 2024, states that you can elect to deduct up to $5,000 of business start-up costs and up to $5,000 of organizational costs, and that each of those $5,000 deductions is reduced by the amount that respective category exceeds $50,000. So $18,400 of start-up costs and $1,150 of organizational costs produce a $5,000 deduction plus a 180-month schedule in the first category, and a $1,150 deduction and no schedule at all in the second.

In your books they want their own accounts for the same reason: two categories, two totals, two schedules, and no way to reconstruct the split later if they were posted to one account.

Are startup costs deductible?

Start-up costs are deductible, and not in the year you pay them. Publication 583, revised December 2024, describes business start-up costs as the expenses you incur before you actually begin business operations, and says these costs are generally capital expenses. Capital means recovered over time rather than deducted when paid. The recovery is the up-to-$5,000 first-year deduction in the year the business begins, plus 180 months of amortization on whatever is left.

There is nothing to attach for costs paid or incurred after September 8, 2008. Internal Revenue Bulletin 2008-34 states that under the temporary regulations a taxpayer is deemed to make the election under section 195(b) for the taxable year in which the active trade or business begins, and is no longer required to attach a statement to the return or specifically identify the deducted amount as start-up expenditures for the election to be effective. The same bulletin describes the route the other way: a taxpayer may forgo the deemed election by clearly electing to capitalize the start-up expenditures on a timely filed return, including extensions, for that year.

One case is worth knowing about because it changes the answer completely. If you investigate a business and never start one, the costs of a general investigation are personal rather than business costs, and the treatment above does not reach them. What separates the two is whether an active trade or business ever began, which is the same date this whole article turns on.