Tax Season Is Over. How Do You Plan for Next Year's Tax Bill?

Tax Preparation Reports the Year That Already Closed

When a tax return is filed, the year has already closed. The return puts the numbers in order, but the income, deductions, and payments are already set. Planning before year-end gives you more room to adjust the outcome.

Tax preparation means the year is closed. There is not much left to do at that point, outside of items like certain retirement contributions that can still be made after December 31. Everything else reflects decisions, or the absence of decisions, that were made during the year.

Many business owners arrive at filing expecting the process to surface savings that were not planned for. A good preparer can catch missed deductions or identify errors. What the return cannot do is restructure owner pay that has already occurred, adjust quarterly payments that were not made, or change how business income flowed through the year. Those decisions had a tax consequence, whether they were reviewed in advance or not.

Key Takeaways

• Tax preparation is a reporting function. It tells you what happened. Tax planning is a forward-looking service with a different scope and timing.

• A once-a-year accountant relationship may be accurate at filing, but leaves the planning work undone.

• Several items can still be reviewed after filing, including withholding, estimated payment structure, and whether the books are clean enough to plan from.

• Planning works best mid-year, before income, draws, and expenses lock in the outcome.

• Some tax questions are also business questions. When they are, the right support goes beyond the return.

What Tax Planning Actually Involves

Tax planning is a separate service with a different question at its center. Where tax preparation asks what happened last year, tax planning asks what can still be reviewed, adjusted, or planned for before the year closes.

That distinction changes what the work actually involves. A planning conversation in the spring or summer looks at projected income for the current year, whether withholding or estimated payments are tracking with that projection, what retirement contributions are still available, whether the business structure is working, and whether any significant decisions are coming that will affect the tax outcome. There is still time to act on what is found.

At DesCPA, that planning process often includes a beginning-of-year kickoff, tax preparation, a mid-year check-in, and an end-of-year true-up. The purpose is to review the tax position while there is still time to act.

For business owners who were unhappy with last year's results, the mid-year review is the relevant window. The filing is done, but the current year is still in progress. That creates room to make informed adjustments before the same gap appears again.

After Tax Season, Start With a Planning Review

Filing the return does not close every conversation. Several items are worth reviewing now, even after the prior year is done, because they directly affect the current year's outcome.

Withholding accuracy. If last year's bill was caused partly by a withholding gap, the same gap may already be building in the current year. Checking withholding now, particularly if income has changed or if W-2 and business income are both in the picture, can prevent the same result.

Estimated payment structure. If quarterly payments were too low last year, this year's amounts should be recalibrated based on current income projections. Payments set on last year's numbers may understate what this year will require.

Income changes. A new contract, a growing business, a raise, consulting income on top of a salary; any of these can shift the tax position and may not be reflected in the payment structure.

Owner pay. How compensation was taken last year, whether as salary, distribution, or a mix, affected the tax result. Reviewing that structure before the current year ends matters more than reviewing it after.

Retirement contribution options. Depending on the business structure, contribution windows and deadlines vary. Some are still open after filing. A planning review confirms what is available and what needs to happen before year-end.

Book accuracy. Tax planning requires clean books. If the prior year's records were not kept up to date, the same problem will make it harder to project accurately this year. Getting the books in order now is the foundation for everything else.

Tip: If your books were behind when you filed your return, that is the first thing to address before any planning conversation. Planning from inaccurate numbers produces inaccurate results.

Why a Once-a-Year Tax Relationship May Not Be Enough

Many business owners have a CPA they trust and hear from once a year. The return gets filed accurately. The relationship is fine. But a once-a-year engagement, by its structure, is a preparation engagement. It is built around the filing, not around the year.

This is not a criticism of anyone involved. It is a description of the scope. A tax preparer who files an accurate return has done what they were hired to do. If planning support was not part of the agreement, it was not part of the service. The gap is not competence. It is the scope.

The business owners who benefit most from tax planning are typically those whose income has grown, whose business is more complex than it was a few years ago, or who are making decisions about hiring, equipment, owner pay, or entity structure that carry tax consequences. At that point, a once-a-year filing relationship may accurately report what happened while leaving the most impactful decisions unreviewed.

That is why many business owners ask the same question after filing: "I had a good year, so why do I owe so much?" The answer is usually tied to decisions made during the year, not at filing.

What Needs to Happen Before Year-End

The most useful planning window for the current year runs from now through approximately October or November. After that, many decisions have already been made by default.

A mid-year tax projection is the starting point. It estimates what the current year tax liability will look like based on actual income to date and projected income through year-end. It tells you whether current withholding and estimated payments are on pace, or a shortfall is building.

From there, a planning review typically covers:

• Estimated payment adjustment: Correct a shortfall before the next quarterly due date.

• W-2 withholding review: Update withholding if income has changed.

• Business income projection: Confirm the current-year profit is being tracked accurately.

• Cash reserve planning: Set aside tax liability as income arrives, not after.

• Owner pay review: Evaluate compensation structure before year-end.

• Entity structure discussion: Assess whether the current structure fits the current income level.

• Retirement planning: Identify contribution options and deadlines before they close.

Each of these items has a deadline. Reviewing them mid-year leaves time to act. Reviewing them in January leaves time only to record what has already happened.

Certain events also trigger a planning review outside the regular filing calendar. DesCPA's article on tax planning triggers covers the most common events that should prompt an immediate review.

Tax Planning Is Not Just About Paying Less

When people think about tax planning, they usually think about reducing the bill. That is part of the work. But the planning done with clients goes beyond what will be owed.

Knowing what is coming matters as much as reducing it. A business owner who knows mid-year what the year-end liability is likely to be can make decisions around it before the window closes. They can adjust draws, time a purchase, or fund a retirement account before the deadline rather than asking afterward whether it is still possible.

There is a cash-flow dimension that rarely comes up in a tax-prep context. Tax liability is a business expense. It should be planned for like payroll or rent, as a predictable cost with a known due date. When it is not, it arrives as a surprise, and the business scrambles to cover it. Owners sometimes take on short-term debt to pay a tax bill that could have been set aside gradually throughout the year.

Tax planning may not create a lower number. It gives you a better chance to understand the number before it is too late to make planning decisions.

When Tax Planning Connects to CFO Support

Some tax questions are actually business questions. When a client asks whether they can afford to hire someone, it is a cash-flow question. When they ask whether they should pay themselves more, that is a question about compensation and tax structure. When they ask whether the business can support growth, that is a profitability and planning question.

A tax return does not answer those questions. It records what has already happened. For business owners whose income, cash flow, and structure require ongoing review, the conversation eventually moves into territory that requires ongoing financial oversight, not just an annual or mid-year review.

That is where fractional CFO support comes in. It covers financial reporting, cash flow planning, and advisory work that connects tax decisions to business decisions. Learn more at How much does a fractional CFO cost and What problems does a fractional CFO solve?

How DesCPA Helps After Tax Season

At DesCPA, the work does not stop when the return is filed. For clients who want to stop reacting at filing time, the engagement shifts to planning: reviewing the current year's position, adjusting what can still be adjusted, and putting a structure in place so the next year does not produce the same conversation.

If tax season left you with questions about next year, DesCPA can help you review what happened and plan before the next tax deadline. Schedule a free intro call to see if it is a good fit.

FAQ

What is the difference between tax preparation and tax planning?

Tax preparation reports what already happened during the prior year. It organizes income, deductions, and payments into a filed return. Tax planning works during the current year to project the liability, adjust withholding and estimated payments, evaluate business structure, and make available decisions before the year closes. They are separate services with separate scopes.

Can anything be done about last year's tax bill after it is filed?

In most cases, the prior year is closed once the return is filed. Amended returns can correct errors. Certain retirement contributions can still be made after December 31, depending on the plan type and business structure. Outside those limited situations, the focus should be on what can still be adjusted for the current year.

When is the best time to start tax planning for the current year?

As early in the year as possible, and no later than mid-year. A planning review in the spring or summer leaves time to adjust estimated payments, update withholding, review owner pay, and make decisions that affect the year-end outcome. Waiting until the fourth quarter reduces the available options.

What does a mid-year tax projection involve?

A mid-year projection estimates the current year tax liability based on actual income to date and projected income through year-end. It identifies whether current withholding and estimated payments are on pace and flags any gaps before they become a surprise at filing.

Do I need a fractional CFO or just tax planning?

For many business owners, tax planning is the right starting point. Fractional CFO support makes sense when the questions go beyond tax, including cash flow management, financial reporting, hiring decisions, and business growth planning. The two services often overlap for owners whose businesses have grown to the point where tax decisions and business decisions are connected.

How is DesCPA's planning engagement structured?

The engagement includes a beginning-of-year kickoff, tax preparation, a mid-year check-in, and an end-of-year true-up. The goal is that by the time the return is filed, the number should not be a surprise.

About the author

Lydia Desnoyers, CPA is a Business Advisor and Fractional CFO at DesCPA. She works with business owners and women-led law firms on financial strategy, cash flow planning, and tax planning decisions that support long-term growth.

Her writing focuses on practical guidance that helps readers understand when numbers are accurate, when strategy matters, and how to make better financial decisions with the information they already have.