The Core Timing Problem

Most meaningful tax outcomes are determined before December 31st.

March is when returns are filed — not when strategy is created.

A CPA can still add value in March, but usually not by changing last year’s results.

Quick answer:

A CPA usually cannot fix taxes in March for the prior year because most tax outcomes depend on decisions made before December 31. March is best used to correct issues for the current year and plan before deadlines pass.

If this situation sounds familiar, proactive tax planning during the year makes the biggest difference.

Why Most Tax Outcomes Are Already Locked by March

A CPA’s ability to influence taxes depends on timing, not intent.

Once the tax year closes, you generally can’t retroactively change:

• how income was earned,
• how compensation was structured,
• how transactions were executed,
• or when major purchases occurred.

That’s why March conversations often feel reactive. They focus on reporting what already happened rather than shaping outcomes while options were still available.

If you are wondering whether a CPA can fix taxes in March, the answer usually depends on what decisions were made before year-end.

According to Steve Madsen, CPA, most business owners overpay taxes because planning happens too late.

What a CPA Typically Cannot Fix in March (for Last Year)

For the prior tax year, these areas are usually fixed once the calendar year ends.

Payroll and owner compensation decisions

For S-Corporation owners especially, payroll choices made during the year determine:

• wages versus distributions,
• payroll tax exposure,
• retirement contribution limits,
• and underpayment risk.

By March, those outcomes generally can’t be unwound without creating compliance issues.

Entity decisions that should have happened before income was earned

Entity taxation (LLC vs. S-Corp vs. partnership treatment) affects how income is taxed.

Those decisions are most effective before income is generated, not after the year closes.

Transaction structure that needed to happen before closing

Real-estate ownership, allocations, and entity setup usually must be correct before a property closes or is placed in service. By March, the transaction is already complete.

Timing-based deductions tied to year-end actions

Many high-impact deductions depend on when a purchase was made or when an expense was paid. If it didn’t happen by year-end, it usually doesn’t apply to last year.

What a CPA Can Still Improve in March

If you want to avoid this timing problem in future years, proactive tax planning during the year makes the biggest difference. You can learn more on our Tax Planning for Business Owners page.

March is not useless — it’s just misunderstood.

A CPA can still add real value in these ways:

Cleaning up financials so the return is accurate

Messy bookkeeping often causes unnecessary tax cost:

misclassified expenses, missed deductions, unreconciled accounts, or personal items mixed into business books.

Cleaning this up in March improves accuracy, defensibility, and prevents errors that quietly increase tax.

Making elections and filings that are still within deadlines

Some elections and filings have spring deadlines. While they won’t rewrite history, they can prevent avoidable problems and set the year up correctly.

Capturing limited post-year-end opportunities

Certain contributions and elections may still be available after year-end depending on deadlines and facts. These are narrow but worth reviewing.

Turning March into the start of proactive planning for the current year

This is where March actually shines.

Used correctly, March becomes a planning checkpoint:

adjusting withholding or estimates, correcting payroll structure, aligning entity treatment, and setting quarterly review points before the year gets away from you.

For S-Corporation Owners, March Is Especially Critical

S-Corporation owners experience the March timing problem more than almost anyone else.

Payroll, distributions, retirement contributions, and reasonable compensation all interact — and once the year closes, those interactions are hard or impossible to unwind.

In March, a proactive CPA should be asking:

• Is payroll set correctly for the current year?
• Are distributions aligned with compensation?
• Is the retirement strategy coordinated with payroll?
• Are quarterly planning checkpoints scheduled?

These questions don’t fix last year — but they prevent the same problems from repeating.

Federal Timing Rules Apply Nationwide

This timing reality is not a Utah issue — it’s a federal tax law issue.

Whether your business operates in Texas, California, Florida, or Utah, the same federal deadlines govern:

• payroll taxation,
• entity treatment,
• depreciation timing,
• and most planning opportunities.

State rules vary, but the March vs. December problem exists nationwide.

How We Use March Differently

At Madsen and Company, March is not just about finishing last year’s return.

It’s a planning checkpoint.

In March, we focus on:

• correcting payroll and withholding early,
• identifying decisions that must be made before mid-year,
• flagging transactions that should be structured before execution,
• and setting a cadence for review before deadlines close.

The goal is simple:

use March to prevent next year’s surprises instead of reacting to last year’s results.

A CPA can prepare and file a return in March, but most meaningful tax savings come from decisions made before year-end — which is why March works best as a planning checkpoint for the year ahead.

A CPA cannot usually fix taxes in March, but March can be used to plan the current year correctly.

If you are wondering whether a CPA can fix taxes in March, the real solution is planning before the year ends.

We work with business owners in Utah, including South Jordan and the Salt Lake County area, as well as throughout the United States.

How Madsen and Company Helps With Tax Planning

At Madsen and Company, tax planning is done during the year — not just when the return is prepared.

We work with business owners, S-Corporation owners, and real-estate investors who want proactive guidance instead of last-minute surprises. Planning during the year allows decisions about payroll, entity structure, retirement contributions, and major purchases to be made before deadlines close.

If you want to avoid this situation next year, proactive tax planning needs to happen before year-end.