Year-round tax planning means making tax decisions while there is still time to change the result, not reconstructing the year in March. For a business owner, that is a short review each quarter: where income is running, what estimated payments are needed, what to buy or defer, and what the books must show before December 31. It is October 18, 2026, so the most valuable window for 2026 is open right now, and this guide shows what to do with it.
TL;DR
- Tax preparation looks backward at a year that is over. Tax planning looks forward, while income, deductions and timing are still adjustable.
- A quarterly rhythm beats one big year-end scramble: books closed monthly, projections each quarter, estimated payments on schedule.
- For 2026, the next federal estimated payment is due January 15, 2027, and the retirement plan limits below are worth checking before year-end.
- Real estate investors and owners with changing entity structures have the most to lose from guessing, because passive loss rules and entity choices are hard to fix after the fact.
Table of Contents
- What year-round tax planning actually is
- Why waiting until April costs money
- A quarter-by-quarter planning calendar
- Estimated taxes: the dates and the safe harbor
- Fall moves worth evaluating before December 31
- Real estate investors: know your status before the year ends
- A year-end bookkeeping checklist
- Does your tax year have to be the calendar year?
- Our perspective
- Working with Elevate Business Consulting
- FAQ
- Sources
What year-round tax planning actually is
Most owners meet their CPA once, in tax season. By then the return is mostly decided: the year is closed, the purchases are made, the payroll is run. Preparation can only report what happened.
Experts describe planning as forward-looking: you manage income, deductions, investment gains and timing decisions before deadlines limit your options. The same guidance walks through a seasonal cycle: review after filing in spring, check projections mid-year, evaluate liability and harvest losses in the fall, and take final actions such as retirement contributions before year-end.
The IRS itself frames it as a way to make the next filing season less stressful, with simple habits: organize records, confirm filing status, understand adjusted gross income, check withholding and report name or address changes.
For a business owner, three things sit on top of that list:
- Reliable books. A projection is only as good as the bookkeeping behind it.
- Estimated payments. Without an employer withholding for you, the schedule is your responsibility.
- Decisions tied to tax. Entity choice, equipment purchases, owner pay, retirement plans and hiring all change the number.
Why waiting until April costs money
By the time April arrives, many opportunities for the prior year have already expired. You cannot retroactively buy equipment in the prior year, run a bonus through payroll in December, or fix a cash shortage that built up across four quarters.
The surprise bill is the visible cost. The hidden costs are usually larger:
- Tax due that nobody saved for, forcing a loan or a delayed vendor payment.
- Underpayment penalties when estimated payments fall short.
- Deductions that exist but cannot be documented because receipts were never categorized.
- Entity or payroll setups that quietly cost more than they should.
The SBA notes that organization is the foundation of estimating taxes, and that payments are split by quarter: January to March, April to June, July to September and October to December. Keeping a running file each quarter is what makes the later numbers possible.
A quarter-by-quarter planning calendar
Here is a practical rhythm. Adjust it to your industry, but keep the cadence.
| Quarter | Planning focus | What you should have in hand |
|---|---|---|
| Q1 (Jan to Mar) | Close the prior year, file, set the new-year baseline | Reconciled books, filed return, last year’s tax total, entity and payroll review |
| Q2 (Apr to Jun) | Compare first-quarter results with the plan | Updated profit estimate, first estimated payment made, adjusted budget |
| Q3 (Jul to Sep) | Midyear tax review and projection | Year-to-date profit and loss, projected tax, equipment and hiring plans |
| Q4 (Oct to Dec) | Final moves before year-end | Year-end bookkeeping checklist done, retirement contributions decided, payroll tidy |
Winter: close the books and set a baseline
Finish reconciliations, file the return, and write down what last year’s tax actually was. That figure matters later because it drives the prior-year safe harbor for estimated payments. This is also the moment to ask whether your entity type still fits. If you operate as an LLC, our guide to LLC tax questions every owner should ask is a good starting list.
Spring: compare reality to the plan
Three months of real numbers tell you more than any forecast made in December. Are sales ahead or behind? Did a large expense land early? Did you hire? Update your tax estimate while it is cheap to adjust. Cash flow forecasting belongs here too, since taxes are a cash event as much as an accounting one.
Summer: the midyear tax review
June and July are the best time for a midyear tax review. Run a year-to-date profit and loss, project it forward, and estimate the full-year tax. If profit is running well above plan, you have months to act: fund a retirement plan, time equipment purchases, or reconsider owner compensation. If it is below plan, you may be able to lower your remaining estimated payments.
Fall: the decision window
This is where you are now. With the third-quarter payment behind you, the questions are practical: how much will the full year’s tax be, what can still be done before December 31, and will the books be clean enough to support it? The last section of this guide gives a year-end accounting checklist.
Estimated taxes: the dates and the safe harbor
If you are self-employed or own a pass-through business, quarterly estimated payments are the backbone of planning. For 2026, the IRS Form 1040-ES package lists these due dates:
| Payment | Federal due date |
|---|---|
| 1st | April 15, 2026 |
| 2nd | June 15, 2026 |
| 3rd | September 15, 2026 |
| 4th | January 15, 2027 |
The same form notes that you do not have to make the January 15, 2027 payment if you file your 2026 return by February 1, 2027 and pay the full balance with it. Late or insufficient payments may bring an underpayment penalty.
If you pay state estimates too, check your state’s calendar separately. Payments to the IRS count only toward federal tax.
For how to calculate each payment, see our walkthrough on quarterly estimated tax payments. Then confirm the penalty rules against the current Form 1040-ES instructions, since safe harbor thresholds depend on your prior-year income and filing status. Your CPA should run that comparison for you before the January payment.
Fall moves worth evaluating before December 31
None of these is right for everyone. Each has trade-offs that depend on your entity, income and cash position. They are the items to put on the table in an October or November planning meeting.
Retirement plans
A business retirement plan is one of the few deductions where a decision can still shift your tax picture late in the year. The IRS lists these 2026 figures in Publication 560:
- 401(k) elective deferral limit (excluding SIMPLE plans): $24,500
- Catch-up contributions for age 50 or over (excluding SIMPLE plans): $8,000
- SIMPLE plan salary reduction limit: $17,000
- Defined contribution plan limit: $72,000
- Annual benefit limit for a defined benefit plan: $290,000
- Maximum compensation for figuring benefits: $360,000
Some plan types must be established by specific dates, and deferrals are often tied to payroll, so waiting for the last week of December can close the option. Ask early.
Equipment, hiring and timing
Buying equipment you need anyway can make sense before year-end. Buying equipment only for a deduction rarely does, since you spend a dollar to save a fraction of it. A planning meeting tests the purchase against your cash forecast, not just the tax return.
Owner pay and payroll
If you run an LLC taxed as an S corporation, owner wages, payroll filings and distributions all need to line up before year-end. Our explainers on LLC versus S corporation taxes and S corporation election requirements cover the decision. For sole proprietors and single-member LLCs, lowering self-employment taxes legally is the related question.
Coordinate with the rest of your finances
Tax moves ripple. Experts caution that a single decision, such as a Roth conversion or a large bonus, can affect Medicare premiums, brackets and credits. If you also work with a financial advisor, your tax professional and advisor should be looking at the same numbers.
Real estate investors: know your status before the year ends
Rental owners have a planning issue that is easy to get wrong. According to IRS Publication 527, most rental real estate is a passive activity, so losses generally cannot offset wages or business income. Two exceptions matter:
- A taxpayer who actively participates may be able to deduct up to $25,000 of rental losses against nonpassive income, subject to the IRS conditions.
- A real estate professional, who performs more than 750 hours of services and spends more than half of personal services in real property trades or businesses, can avoid the passive loss limits.
Active participation is a much lower bar than material participation. Mixing them up is how losses end up disallowed. The IRS explains how disallowed passive losses carry forward to the next year, which is helpful but not the same as using them now.
Hours are the practical problem. A log kept during the year is far more convincing than a reconstruction in April. See our list of deductions landlords should track for the records to keep.
A year-end bookkeeping checklist
Planning fails when the books are late. Before December 31, work through this list, or ask your bookkeeper to:
- Reconcile every bank, credit card and loan account through the latest statement.
- Clear uncategorized transactions and the “ask my accountant” account.
- Review accounts receivable and write off what you will not collect.
- Compare payroll reports to the general ledger and confirm payroll tax deposits.
- Gather contractor information so year-end forms are not a scramble in January.
- Record fixed asset purchases with dates and costs.
- Reconcile owner draws, distributions and loans separately from expenses.
- Pull a year-to-date profit and loss and compare it to the projection you made at midyear.
- Confirm your fourth-quarter estimated payment amount.
- Store receipts and documents where your CPA can reach them.
If your books are behind, fix that first. A QuickBooks file that has not been reconciled since June cannot support a tax decision. Our pages on bookkeeping that helps you plan ahead and QuickBooks consulting cover cleanup and setup. Financial reporting is the next step, turning clean books into numbers you can steer by.
Does your tax year have to be the calendar year?
Not always. The SBA’s tax guidance points out that businesses choose a tax year, and a fiscal year can be an option if it fits your industry cycle better. Many owners assume the calendar year is the only choice. Whether you can change depends on your entity type and bookkeeping method, so raise it with your CPA before making any move, not after.
Our perspective
We see the same pattern with new clients. They arrive in March with a shoebox, a surprise balance due and a question: “Is there anything we can do?” The honest answer is usually that most of the options expired in December.
Our view is that tax, accounting, payroll and business decisions are one conversation, not four. The tax number comes from the books. The books depend on how payroll and entity structure are set up. And the right tax move depends on cash, because a deduction you cannot afford is not a strategy. That is why we work year-round with small businesses, startups, real estate investors and cannabis operators: the planning is only as good as the information in front of us, and that information changes monthly.
If you take one thing from this guide, make it the midyear review. It is a one-hour meeting that changes the other six months. And if you missed it, the fall meeting is the second-best option, and it is still worth having.
— Justin
Working with Elevate Business Consulting
Elevate Business Consulting, LLC is a CPA firm based in Medford that handles tax planning and preparation, accounting and bookkeeping, payroll and business consulting for small businesses. If you want a planning rhythm built around your numbers, start with our tax planning for small businesses page or reach us through our main site. If you are local, here is what a Medford CPA should do for your business.
FAQ
When should I start tax planning for next year?
Start as soon as this year’s return is filed, and no later than your midyear review. Each quarter, update your profit estimate and compare it with your last projection. The earlier you see a gap, the more options you have to close it.
How is tax planning different from tax preparation?
Preparation reports what already happened and produces an accurate return. Planning uses current-year numbers to adjust income, deductions and timing while there is still time. Most business owners need both, and the planning is where savings usually come from.
How often should I meet with my CPA?
A quarterly check-in fits most small businesses, with one meeting at midyear and one in the fall before year-end. Businesses with fast growth, real estate activity, payroll changes or an entity change may need more. The right frequency is the one that keeps estimates current.
Do I need to pay estimated taxes if I own a small business?
Often yes, if you are self-employed or your business passes income through to your personal return and no withholding covers the tax. The 2026 federal dates are April 15, June 15, September 15 and January 15, 2027. Check the current Form 1040-ES rules with your CPA to confirm what applies to you.
Sources
- IRS: Year-round tax planning tips for taxpayers
- U.S. Bank: Year-Round Tax Planning Strategies, 7 Tax Tips
- TaxGPT: What is Tax Planning?
- SBA: Quarterly Taxes, The Basics
- IRS: 2026 Form 1040-ES
- IRS: 2025 Publication 560
- IRS: Publication 527, Residential Rental Property
- IRS: Topic no. 425, Passive activities
- SBA: Pay taxes