It’s late in the year, your agency had a good run, and it just hit you that a good year means a tax bill you can’t yet size. By spring, the year is closed, and your options are gone. The year-end tax planning strategies that matter happen now, while you can still act, and they all run on books you can trust.
Here’s what we cover: timing income and expenses, funding retirement, handling equipment and 1099s, and getting ready for your tax pro. It’s general education, so check any move with your tax professional.
TL;DR: Year-End Tax Planning for Service Businesses
The highest-leverage year-end moves for a cash-basis online service business:
- Clean books first: Every strategy depends on a profit number you can trust, so get current before you plan.
- Time income and expenses: On a cash basis, nudge income and deductions across December 31 to fit your year.
- Fund retirement: A SEP-IRA or Solo 401(k) lowers your taxable income and builds your own net worth.
- Handle equipment and 1099s: Place needed equipment in service before year-end and sort contractor forms under the higher threshold.
- Check your Q4 payment and your CPA: Review your final estimated payment and take the big calls to your tax professional.
Start With Clean, Current Books
Every strategy below assumes you know your numbers. If your books are three months behind, you’re not planning, you’re guessing.
Before December, get current. Reconcile your bank and credit card accounts, categorize the transactions that have been piling up, and get a Profit and Loss (P&L) statement you actually trust. That single report tells you roughly where your profit will land, which is the number every year-end decision keys off of. You can’t hand your CPA (certified public accountant) a clean picture without it.
As our co-founder Nathan Hirsch puts it, “Even if you’re not making money, you still want to look at the numbers each month and be able to make decisions based on those numbers.” Year-end is that idea with the volume turned up. A reliable profit estimate now is what lets you decide, on purpose, whether to accelerate a deduction or defer some income.
This is also the cleanest argument for not doing your own books in Q4, when you’re already slammed. If yours are behind, catching them up now beats scrambling in April. Solid bookkeeping basics for entrepreneurs make the rest of this list possible.
Time Your Income and Expenses Before December 31
This is the lever a cash-basis business actually controls, and it’s the one most owners never use.
On cash-basis bookkeeping, income counts when you receive it and an expense counts when you pay it. That timing is a dial. If you expect a lower tax year now than next year, you can nudge income into this year and hold deductions for later. If next year looks bigger, you do the reverse: pull income forward and push deductions out.
For most service businesses having a strong year, the play is to defer income and accelerate expenses. A few concrete moves:
- Delay a late-December invoice: Send that last invoice in early January instead of December 30, and on a cash basis the payment lands in next year’s income. One caution: you can’t sit on a check that’s already in your hands and pretend you didn’t get it, so ask your CPA how the timing rules apply to you.
- Prepay expenses you’ll owe anyway: Software renewals, a chunk of next year’s contractor work, or a January rent payment made in December can count now.
- Stock up on real supplies: If you were going to buy the new laptops or the annual tool subscriptions regardless, buying before year-end pulls the deduction into this year.
Here’s a simple version. Your consulting firm is on track for a great year, and you’ve got a $12,000 December invoice ready to send. Send it December 30 and that $12,000 is this year’s income. Hold it to January 2, and on a cash basis, it becomes next year’s income instead. Same work, same client, different tax year.
Whether that’s the right move depends on how this year compares to next, which is exactly the kind of thing your clean P&L and your CPA answer together.
Fund Your Retirement Accounts to Lower Taxable Income
Putting money into the right retirement account is one of the few moves that cuts your taxable income and builds your own net worth at the same time.
Two accounts fit most service-business owners:
- SEP-IRA (Simplified Employee Pension IRA): Simple to run. You can contribute up to 25% of your compensation, capped at $72,000 currently, and a SEP can usually be opened and funded up to your filing deadline, including extensions.
- Solo 401(k): For an owner with no full-time employees besides a spouse. You can currently defer up to $24,500 as the employee, plus an employer profit-sharing piece, up to a combined account limit of $72,000. If you’re 50 or older, a catch-up of $8,000 applies, and owners who turn 60 to 63 during the year get a larger $11,250 catch-up instead. One timing catch: a Solo 401(k) generally has to be established by December 31 to count for that year, so this is a “handle it before the ball drops” item.
Say you’re a coach expecting around $150,000 in net profit and you open and fund a Solo 401(k) before year-end. The dollars you contribute come off your taxable income now, and they’re still yours. Your CPA will confirm the exact amount your numbers support, which is another reason the clean P&L comes first.
Not sure your books are ready to support decisions like this before December? That’s the kind of thing we handle every month. Book a discovery call, and we’ll get you current.
Buy and Place Equipment in Service by Year-End
If your business genuinely needs equipment or software, buying it before December 31 can turn a planned purchase into a current-year deduction.
Two rules run the tax side of this, and your CPA handles both: Section 179 expensing and bonus depreciation. Under a recent federal tax law (OBBBA, the One Big Beautiful Bill Act), the Section 179 cap rose to $2.56 million and 100% bonus depreciation is now permanent for qualifying property.
Most service businesses won’t come near those caps, so the number to remember isn’t the ceiling. It’s the deadline.
The asset has to be placed in service by December 31, not just ordered or paid for. Placed in service means it’s set up and ready to use in your business. A laptop still in the box come February is generally next year’s deduction, no matter when you clicked “buy.” So if the new workstations or camera gear are already on your list, get them running before year-end and record them correctly so your CPA can make the election.
One reminder that runs through all of this: the goal is to spend smart on things you actually need, not to spend money to chase a deduction.
Get Your Contractor Payments and 1099s in Order
If you’re an agency or a course business that runs on freelancers, this is your section, and there’s a real change worth knowing.
The reporting threshold for a Form 1099-NEC (Nonemployee Compensation) recently rose from $600 to $2,000. So a contractor you paid $1,800 across the year no longer needs a 1099-NEC, while one you paid $2,000 or more still does. You’ll file those forms early next year.
A higher threshold does not mean looser books. Two things to get right before year-end:
- Collect a W-9 from everyone: No matter how small the job, a Form W-9 gives you the legal name, address, and taxpayer ID you’ll need if payments cross the line, and chasing one down in January is miserable.
- Track payments per contractor: You can only tell who crossed $2,000 if your books tag contractor spend cleanly, which is where retainer-heavy and contractor-heavy operations tend to get messy.
Remember the part that didn’t change: your contractors owe tax on what you paid them, whether a 1099 gets issued or not. The threshold changes your paperwork, not anyone’s tax bill. If you run a marketing agency, for example, that’s exactly what our bookkeeping for marketing agencies service is built for.
Review Your Q4 Estimated Tax Payment
Year-end planning isn’t only about lowering the bill. It’s also about not getting surprised by it.
Most self-employed owners and pass-through businesses pay estimated taxes four times a year, on roughly April 15, June 15, September 15, and January 15. The final payment for the current year is due in January. If your year came in stronger than you planned for back in spring, your earlier payments may have been light, and underpaying can trigger a penalty even when you’re owed a refund at filing.
So before the year closes, take your trustworthy profit number to your CPA and check whether your Q4 payment needs to be bigger. This is a five-minute conversation when your books are current and a stressful guess when they aren’t.
That’s also why the monthly close matters: owners who use a monthly bookkeeping service walk into that conversation with the number already in hand.
Talk to Your CPA About Entity and QBI Decisions
Some year-end moves are bigger than any single deduction, and they belong with your tax professional. These are judgment calls that depend on your full financial picture, so they’re a conversation to have before the year closes, not a rule of thumb to apply on your own.
Raise these with your CPA before year-end:
- Entity structure: Whether staying a sole proprietor or LLC still fits, or whether an S-corporation election would help, depends on your profit and your goals.
- The QBI deduction: The qualified business income (QBI) deduction lets many pass-through owners deduct up to 20% of business income, and a recent law made it permanent. Service businesses have income thresholds and special rules here, so your CPA runs the actual math.
- Owner pay: If you’re already an S-corporation, your reasonable salary versus distributions is worth a review before the final payroll of the year.
You don’t need answers on these going in. You need the right questions and a tax professional who can price out the trade-offs for your situation.
Frequently Asked Questions
A few questions we hear from owners heading into year-end:
Do You Handle Year-End Taxes?
No. We’re a monthly bookkeeping service, and we don’t offer tax filing, tax advice, or CFO services. We keep your books clean and current, so your CPA can plan and file without the usual back-and-forth.
If you need a tax professional, we’re happy to work directly with yours or point you toward one in our network.
When Should I Start Year-End Tax Planning?
Ideally by October or November, while you still have time to act. The useful moves, like timing income, funding a retirement account, or buying equipment, mostly close on December 31.
Waiting until you file in spring means the year is already locked and your options are gone.
Do I Still Need to Send 1099s?
Yes, for contractors you pay $2,000 or more during the year. The threshold recently rose from $600 to $2,000, so some smaller contractors won’t need a form.
Collect a W-9 from everyone regardless, and track payments per contractor so you know who crosses the line. Your CPA files the forms; we keep the records that make it painless.
Can I Lower My Tax Bill by Buying Equipment in December?
Sometimes, if it’s equipment you genuinely need. To count for the current year, the item has to be placed in service, meaning set up and ready to use, by December 31, not just ordered.
Your CPA decides how to deduct it. The point is to buy what the business actually needs, not to spend for the sake of a write-off.
Why Do Clean Books Matter for Tax Planning?
Clean books matter because every strategy depends on a number you can trust. You can’t size a retirement contribution, decide whether to defer income, or check your estimated payment without an accurate P&L.
When your books are current, year-end planning is a short conversation with your CPA. When they’re behind, it’s a guess.
Get Your Books Ready Before Year-End
The owners who breeze through tax season don’t have a secret loophole. They’re the ones whose books are clean and current when the fourth quarter arrives, so they can plan instead of react. Time your income and expenses, fund your retirement account, handle equipment before December 31, sort your 1099s, and check your Q4 payment. Then let your CPA do what they do best.
Our founders learned this firsthand. When they built and sold FreeUp, a service business they grew to eight figures, clean monthly books meant they knew their numbers cold through the sale’s due diligence. That’s the reported experience behind how we work, not a promise about your outcome, but it’s why we’re built the way we are.
If your books aren’t ready to plan from, we can fix that before year-end. A dedicated bookkeeper gets you caught up and keeps you current, with your financials in hand each month so the next tax season is a conversation, not a scramble. Get a pricing quote and start with clean books.
Clean books. On time. Every month.
