Cash Basis vs. Accrual Basis Accounting: Which Should Your Business Use?

Cash basis and accrual basis do not change how much your business earns. They change which year the income and deductions land in, and that timing is what sets your tax bill in any given year.

Most small businesses get to choose, and plenty are on accrual only because someone set them up that way years ago.

The rules changed in 2018. Before then, a C-Corp, or a partnership with a C-Corp partner, generally lost the cash method once its average annual gross receipts for the prior three tax years exceeded $5 million, and carrying inventory generally forced a business onto accrual for its purchases and sales.

The 2017 tax law replaced that with a single $25 million gross receipts test, indexed for inflation and $32 million for 2026, and put the inventory rules on the same test. (law.cornell.edu)

A lot of what is still floating around online is out of date, including the old claim that carrying inventory automatically forces you onto accrual.

What Is Cash Basis Accounting?

Cash basis accounting means you record income in the year you receive it and a deductible expense in the year you pay it. The appeal is simple: less bookkeeping, and the books stay close to the bank account.

But “when you pay it” is not the whole rule. Prepaid expenses, equipment, and inventory follow their own timing rules, so paying in December does not automatically make it a December deduction. Some short-term prepayments can be deducted when paid. Under the 12-month rule, you generally do not have to capitalize a right or benefit that ends by the earlier of 12 months after it begins or the end of the following tax year. (irs.gov)

You are also taxed on money that is available to you, not just money you have moved. A check that arrives on December 31 is income that year even if you deposit it on January 2, because you already have dominion and control over it. Money you genuinely cannot reach is different: if your control of its receipt is subject to substantial limitations or restrictions, you have not received it yet. (law.cornell.edu)(irs.gov)

What Is Accrual Basis Accounting?

Accrual basis accounting means you record income when you earn it and an expense when you incur it, regardless of when the money actually moves.

You have earned income once your right to be paid is settled and the amount can be determined with reasonable accuracy, which generally happens no later than when you finish the work, when payment comes due, or when it arrives, whichever is first. (law.cornell.edu)

Generally, you have incurred an expense once you are definitely on the hook, the amount can be determined with reasonable accuracy, and economic performance has occurred, which for goods and services bought from someone else means they have actually been provided to you. A separate group of costs, including insurance, taxes and rebates, is generally not incurred until you pay it, though a recurring bill paid soon after year end can sometimes still count for the earlier year. That one is worth asking about rather than assuming either way. (law.cornell.edu)(law.cornell.edu)(law.cornell.edu)

Cash Basis vs. Accrual Basis: The Key Differences

Differences When Income and Expenses Actually Hit Your Books

At the simplest level, the difference is the trigger: money moving versus the obligation arising. Over the life of a business both report the same total income, but what changes is which year each piece lands in, and that matters most when an invoice or a bill straddles December 31.

What Your Numbers Actually Tell You About the Business

Accrual is built to answer a management question: did this month make money? It answers it by putting the revenue and the costs that produced it in the same month, whatever the bank account did. Cash basis tracks the bank account more closely, but it is not a cash flow statement, since it leaves out loan proceeds, owner draws, and equipment purchases.

A growing business on cash basis can look unprofitable in a month it paid for materials it has not billed for, and a business on accrual can show a strong profit while its balance falls. Either way, separate cash flow projections still matter.

How Much Bookkeeping Work and Cost Each Accounting Method Creates

Cash basis can often be run largely from bank and credit card activity, though fixed assets, loans, payroll, and owner transactions still need their own records. Accrual adds receivables and payables, bills entered when they arrive, and period-end entries for items like prepaid insurance.

That means accrual costs more to maintain, whether the cost is your own time or outside bookkeeping services. Weigh that against how much you actually use the numbers.

Why the Same Income Year Can Look Profitable Under One Method and Not the Other

A business that does its work late in the year and collects early in the next reports a profitable year on accrual and a lean one on cash, from the same activity. The bank balance on December 31 is identical either way.

Real-World Examples: How the Same Transaction Looks Under Cash vs Accrual Method

The same four transactions can produce very different tax timing depending on which method your business uses.

The December Invoice That Gets Taxed Before You’re Paid

A design agency sends $20,000 of invoices on December 31, with no chance of collecting before the year ends.

On accrual, the whole $20,000 is income that year, because the income was earned. The tax comes due with that year’s return. On cash, none of it is income until the money arrives, so it lands on the following year’s return instead, stacked on top of whatever that year brings in. That buys you a year, which helps cash flow, but it can push the next year into a higher bracket.

Sitting on a December invoice does not defer the income if the work is finished and the amount can be determined with reasonable accuracy, because you have already earned it. What an accrual business can actually plan around is when the work gets done and when costs get incurred, which belongs with its other year-end moves.

The Invoice You Forgot You Were Still Waiting On

The same agency, on cash basis, invoices a client $15,000 in September and the client pays in February, so that $15,000 is income in the year the payment arrives rather than the year the work was done. On accrual it would have been income in September, when the work was finished. Cash basis does not mean untaxed, it means taxed later, and a business that bills slowly can carry a surprising amount of income into the next year.

The Bill You Received but Haven’t Paid Yet

A $6,000 subcontractor bill arrives December 20 for work finished in December, and the agency pays it January 10.

On accrual, the $6,000 is deductible in the first year, because the liability is fixed and the work was performed. On cash, it is deductible in the second year.

This assumes the subcontractor is unrelated. If the bill is owed to a related party who reports on the cash method, the deduction waits until the year the amount is income to that person. On these facts that pushes it into the second year, the same place the cash method puts it. (law.cornell.edu)

In these examples, accrual pulls both the December invoice and the December bill into the first year, so they move the tax bill in opposite directions.

Buying Inventory Before You’ve Sold It

This is where the 2018 change does the most work.

An online retailer buys and pays for $40,000 of inventory in November 2026 and sells it in March 2027. It meets the gross receipts test, meaning its average annual gross receipts for the prior three tax years do not exceed the threshold for the year, and it is not a tax shelter, a status covered further down that mostly catches a business with passive investors. So it can use the cash method. Which year that cost lands in then turns on how it handles the inventory, and it has two permitted options.

The first is to treat the goods as non-incidental materials and supplies. The cost comes back in the year the inventory is provided to the customer or the year it is paid for, whichever is later, so here it lands in 2027, when the goods reach customers. Under that method, buying inventory in December does not create a December deduction, and goods still on the shelf at year end generally have not been recovered yet. (law.cornell.edu)

The second is to follow the business’s own accounting. A qualifying business can use the inventory method in its applicable financial statement or, if it has none, the method in books and records that properly reflect its business activities for non-tax purposes. If that method expenses inventory when it is paid for rather than allocating the cost to ending inventory, the return may be able to do the same, which would put the cost in 2026 instead. (law.cornell.edu)

You cannot simply choose whichever method produces the larger deduction when the return is prepared. The books and other records actually used in the business must support it, and changing an established inventory method generally requires IRS consent. That makes it worth addressing before year end. For more detail, read about inventory timing.

So what the 2018 change bought is not an automatic faster deduction. It is that carrying inventory no longer forces the whole business onto accrual for everything else, and that an eligible business gets to pick the inventory method that fits it.

Does the IRS Actually Let You Choose Your Preferred Method?

Yes, for most small businesses. The test that decides it for almost everyone is size: a business that meets the gross receipts test and is not a tax shelter can use the cash method. For most readers that is the whole answer, and the section below is where to check your own number.

A second rule blocks the cash method by entity type, and it reaches far fewer businesses than its reputation suggests. It catches two kinds of business: a C-Corp that is not a qualified personal service corporation, and a partnership that has such a C-Corp partner. A sole proprietor, an S-Corp, or a partnership owned by individuals is never pushed off the cash method by its size alone. (law.cornell.edu)

Size still matters even to the businesses that rule never touches, especially if they carry inventory. A business that no longer qualifies for the small business inventory rules generally has to use accrual for purchases and sales whatever its entity type.

The Gross Receipts Test That Decides It for Larger Businesses

For tax years beginning in 2026, a business meets the gross receipts test if its average annual gross receipts for the three preceding tax years do not exceed $32 million, meaning the average of 2023, 2024, and 2025. A business that has not been around three years averages the years it has, and a short year is annualized. (law.cornell.edu)(irs.gov) If you incorporated or reorganized a business you already ran, its receipts count too, so the clock does not start over.

Gross receipts is a top-line number and it is broader than your sales figure: it is not reduced by what you paid for the goods you sold, and what the business takes in from investments, such as interest, dividends and rents, counts too. An operating company holding a large investment account is closer to the line than its sales suggest, so if you are anywhere near the threshold the number is worth having your preparer compute rather than estimating it. (law.cornell.edu)

Loan proceeds, and loan principal coming back to you, are not receipts. Commonly controlled businesses may have to combine their receipts even when they keep separate books, so two LLCs owned by the same person generally share one $32 million limit rather than one each.

The same test, together with not being a tax shelter, is also what opens up the simplified inventory methods and exempts a small business from the uniform capitalization rules, which otherwise force more of your overhead into the cost of inventory, and from the limit on deducting business interest. Because it is a rolling three-year average, a growing business can cross the line without doing anything dramatic, so it is worth rechecking each year. The figure is adjusted for inflation annually.

When Accrual Is Required No Matter How Small You Are

One rule has no size exception: a business that counts as a tax shelter for tax purposes cannot use the cash method however small it is. One common way an ordinary partnership or LLC gets there is by becoming a syndicate, a status open to entities other than C-Corps and never to a sole proprietor filing a Schedule C, generally because more than 35% of its losses for the year are allocated to owners who do not actively participate in managing the business, though special active-management rules can change that result. (law.cornell.edu)(law.cornell.edu)

It can happen in a single bad year and it switches off the small business inventory and interest rules at the same time, so if you have investors who are not involved in operations it is worth a conversation before year end. Separately, the IRS can require accrual if a method does not clearly reflect income.

Does Your Entity Type Affect Which Method You Can Use?

For most small businesses, entity type is not what decides this. What counts is how the business is taxed federally, not what it is called under state law, so an LLC follows the rules for whichever classification applies to it. Farming sits outside all of it: farming businesses are carved out of the entity-type rule, though the tax shelter bar still applies and farming has accrual rules of its own. (law.cornell.edu)(law.cornell.edu)

Sole Proprietors and Disregarded Single-Member LLCs

Entity type does not bar a sole proprietor from the cash method, and it is often the simplest choice once the other rules are met. A single-member LLC that is disregarded for tax and owned by an individual is treated as part of that individual, and one owned by a corporation follows the corporate rules instead.

Partnerships and Multi-Member LLCs Taxed as Partnerships

A partnership owned entirely by individuals is never blocked by entity type, at any size. A C-Corp partner brings the partnership under the rule that keeps C-Corps off the cash method. A qualified personal service corporation partner does not, and an S-Corp partner does not either. Even then, the partnership can still use the cash method if it meets the gross receipts test and is not a tax shelter.

S-Corps

Whatever the common shorthand says, S-Corps are not on the entity-type list at any size. What can still reach one is the tax shelter bar, which blocks the cash method however small the business is. An S-Corp with inventory needs both things to use the small business inventory rules: meet the gross receipts test, and not be a tax shelter.

C-Corps

This is the entity type the rule actually names. A C-Corp cannot use the cash method unless it meets the gross receipts test or is a qualified personal service corporation, and a C-Corp that is a tax shelter is barred either way.

Qualified personal service corporations are exempt from the C-Corp size rule, though the separate tax-shelter bar still applies. The exception covers certain employee-owned corporations in fields such as health, law, accounting and engineering, so ask your preparer whether you qualify. (law.cornell.edu)

Entity choice and accounting method overlap, but they are not the same decision. If you are still settling the first, start with entity structure or the business entity tax calculator.

Which Method Should You Actually Use?

The right choice is less about labels and more about how your business operates, when it gets paid, when it pays others, and what kind of reporting you need.

When Cash Basis Makes Sense

• You run a straightforward service business where invoices are paid within a normal cycle
• You have little or no inventory
• You want to manage your own books without a bookkeeper
• You regularly collect after year end for work whose costs you have already paid, so the income you defer outweighs the deductions that wait for payment

When Accrual Basis Makes Sense

• You carry meaningful inventory and want the profit picture to match the goods you actually sold
• You regularly extend credit to customers or use credit with suppliers
• You are planning to seek a loan or outside investment
• You collect for goods or services well before you deliver them, which is where accrual can defer tax and cash cannot

Collecting before you deliver is where accrual can defer tax and cash cannot. A business on the cash method reports a year of subscription revenue in full when it arrives, while an accrual business can elect to push the eligible unearned part into the following year, by one year only. (law.cornell.edu)

This is about your tax return, not your bookkeeping. You can keep accrual books for management and still file on cash.

Best Fit by Business Type

If you are applying for a loan, ask what financial statements they want before you need them, because some require accrual or full GAAP statements and others accept cash-basis ones.

Your Books and Your Tax Return Do Not Have to Match

Your taxable income is generally figured on the method you keep your books on, but the rules allow a documented difference: a business can keep accrual books and file a cash-method return as long as its records support the return, which in practice means keeping a reconciliation between the two. Accounting software such as QuickBooks can show either basis from the same data, and changing that setting changes the report, not your tax method. (law.cornell.edu)

That matters because being told to pick one method can sound like being forced to give up either the better management picture or the better tax timing. You do not have to give up either.

If you have not filed a return for the business yet, you are not switching anything. You adopt a method by using it on that first return, with no Form 3115 and no consent required, as long as it is a method you are allowed to use. That makes the first return the cheapest moment to get this right.

Can You Use a Hybrid Approach?

Two different things get called a hybrid. Keeping one set of books for management and a different tax method on the return is one of them. The other, and the subject of this section, is a hybrid method proper: a single tax method that uses cash for some items and accrual for others.

A combination is permitted if it clearly reflects income and you use it consistently, and the one specifically blessed is accrual for purchases and sales with cash for everything else, the classic arrangement for a business with inventory. What you cannot do is the reverse, counting income when it arrives while deducting expenses before you pay them. (law.cornell.edu)

A third label causes most of the confusion. The “modified cash basis” some accounting software offers is a bookkeeping convention rather than a tax method, and switching your reports to it does not by itself change your return.

How to Switch Accounting Methods

This is a formal process, both directions go through it, and most of the work belongs to whoever prepares your return.

Step 1: Confirm Whether Your Change Qualifies for Automatic Consent

A change of accounting method always requires the IRS’s consent, even if the method you are leaving was wrong, though correcting a posting or arithmetic error is not a method change and needs no form. Most ordinary small business changes, including a move from accrual to cash, are automatic, which means no user fee and no waiting for a ruling. (law.cornell.edu)(irs.gov)

Step 2: File Form 3115 With the IRS

The change goes on Form 3115. For an automatic change the form generally attaches to the return for the year of change, while a request on the other route is filed during that year itself, and your preparer handles the mechanics either way. (irs.gov)

Step 3: Calculate the Section 481(a) Adjustment

A Section 481(a) adjustment is the one-time adjustment that prevents items from being counted twice or missed entirely when you switch methods. Moving from cash to accrual generally adds unpaid customer invoices to income and subtracts eligible unpaid expenses, with further adjustments for inventory and other timing items, and moving the other way reverses those effects.

When that adjustment increases your income it is generally spread over four years, and when it decreases your income you generally take all of it in the first year. (irs.gov) That asymmetry works in your favor in either direction, since a negative adjustment comes back all at once and a positive one is spread over four years. Looking only at receivables and eligible payables, if unpaid invoices outweigh eligible unpaid bills, the move to cash produces a negative adjustment; if eligible unpaid bills outweigh invoices, the move to accrual does. Inventory and other timing items can change the final result.

Step 4: Time the Switch Around Your Tax Year, Not the Calendar

A method change takes effect on the first day of a tax year, so you are choosing a year rather than a date. On the automatic route you can still make the call when you timely file that year’s return, but the other route has to be started during the year of change itself, so it is worth raising early. (irs.gov)

Step 5: Work With a CPA Before You File Anything

Switching without filing is not a shortcut. The IRS can put you back on the method you left, and take the whole adjustment into a single year instead of spreading it over four years. (irs.gov) Winding the business down or selling it can also pull the rest of the adjustment forward. (irs.gov)

And the adjustment has to be built from balances your books may not currently carry, which is usually the real work.

What to Remember

This is about timing rather than how much you ultimately earn, though timing still changes what you pay in a given year. The answer often comes down to one question: do you collect before you pay, or after?

The rules moved in 2018 with the 2017 tax law, and the cash method now reaches much further than it did. So if your business decided years ago that it had to be on accrual, that conclusion is worth a fresh look.

FAQ – Cash Basis vs. Accrual Basis Accounting

Can I Switch From Cash to Accrual Whenever I Want?

No. Both directions need IRS consent and a Form 3115, and the change takes effect on the first day of a tax year rather than a date you pick, though most small business changes are automatic and carry no fee.

Does Cash Basis or Accrual Basis Save More on Taxes?

Neither changes the income you report over the life of the business, so the difference is timing, though timing still changes what you pay in a given year. Cash basis defers income for a business that pays its costs before it collects, and accrual can defer income for one that collects up front.

What Accounting Method Should a Small LLC Use?

Cash, for most of them. It is the lighter set of books, and if you pay your costs before your customers pay you, it also defers tax. Accrual earns its extra work when you carry real inventory, or when you need monthly numbers that match the work you actually did rather than the money that happened to move.

Being an LLC does not decide it, its federal tax classification does: a disregarded single-member LLC owned by an individual follows the sole proprietor rules, one taxed as a partnership follows the partnership rules, and one taxed as an S-Corp or C-Corp follows those. Whichever applies, the same three questions settle whether cash is available: does it meet the gross receipts test, is it a tax shelter, and does it carry inventory?

Do I Have to Use Accrual Accounting If I Carry Inventory?

No. This is the rule that changed in 2018, and much of the advice still online predates it. A business that meets the gross receipts test and is not a tax shelter can use the cash method and carry inventory.

What it still cannot do is deduct inventory simply by buying it. Under the materials and supplies method, a cash-basis business recovers the cost when the goods reach the customer or when it pays for them, whichever happens later. The second permitted method follows the business’s own applicable financial statement or, if it has none, its books and records, and can land the cost in a different year.

Is Accrual Accounting Required by GAAP?

Yes. Statements not prepared on the accrual basis are not GAAP statements, though the reverse does not follow. Cash-basis and tax-basis statements are recognized frameworks a CPA can report on.

What Happens If My Business Grows Past the Gross Receipts Threshold?

A C-Corp other than a qualified personal service corporation, or a partnership with such a C-Corp partner, generally has to move to accrual for the first year it no longer meets the test. Others are not pushed off the cash method by size alone, though a tax shelter is barred at any size, and they do lose the small business breaks for inventory, capitalization, and business interest.

Want help deciding which accounting method fits your business? Reach out.