The June 15 Tax Trap Most Law Firm Owners Don’t See Coming
The June due date is awkward.
Unlike the April and September estimated payments, the second payment covers a shorter income window.
For most calendar-year taxpayers, it is tied to income earned from April 1 through May 31, and the 2026 payment is due on Monday, June 15, 2026.
That shorter window can create a false sense that the payment is smaller or less important.
For law firm owners, that assumption can be dangerous.
Many firms have uneven collections.
A contingency-fee firm may have one strong settlement in May.
A flat-fee or business-law practice may collect a wave of retainers in April.
A litigation-heavy firm may have high billings but delayed cash.
If you simply copy your April estimate, you may be paying too little or too much.
I have seen this pattern often:
The firm owner looks at the bank account, sees cash is tighter than expected after spring expenses, and decides to delay the tax payment “until things smooth out".
The problem is that taxes do not disappear just because collections are lumpy.
They keep building in the background.
June is also when many owners are still mentally anchored to last year’s return.
That can create blind spots if the current year is materially different.
Common June warning signs for law firm owners include:
Revenue is ahead of plan, but tax reserves were never increased.
Owner distributions stayed high after a strong spring month.
Payroll changed, but withholding was never revisited.
A partner or owner is relying on last year’s safe harbor without realizing current-year income is moving much faster.
The firm is profitable on paper, but cash is weak because receivables, debt payments, or hiring costs are soaking up liquidity.
When those issues pile up, June becomes more than a tax deadline.
It becomes a stress test for your financial systems.
Safe Harbor Rules Matter, But They Are Not the Whole Strategy
A lot of owners hear “safe harbor” and assume it means they can stop thinking.
That is not what it means.
At a high level, federal underpayment rules generally let you avoid penalties if you pay enough through withholding and estimated payments during the year.
The common benchmarks are:
100% of last year’s total tax if your adjusted gross income was $150,000 or less
110% of last year’s total tax if your adjusted gross income was above $150,000
90% of your current year’s total tax
Those rules are useful, but they solve a very specific problem:
Penalty avoidance.
They do not automatically solve your cash flow problem.
Here is the trade-off.
Option A is to lean on prior-year safe harbor.
That is usually simpler and easier to administer.
The downside is that if your income drops, you may overpay and tie up cash you would rather keep in the business.
Option B is to pay based on current-year projections.
That can preserve cash better when your income is changing, but it requires cleaner books and more active forecasting.
For most growing law firms, I would suggest a blended mindset:
Use safe harbor as a floor for protection, but run a real current-year projection so you know whether you are quietly building a larger balance due later.
That matters because many owners technically avoid penalties while still creating a bad October or April surprise.
From a cash-flow standpoint, that is not a win.
What Law Firm Owners Should Review Before June 15
If you want June to work in your favor, do not start with the tax form.
Start with the business.
A solid June tax review should answer five practical questions.
1. What has the firm actually earned so far?
Pull year-to-date profit, not just revenue.
Revenue alone is a vanity number for tax planning.
What matters is what is left after payroll, contractor costs, software, rent, marketing, and other deductible expenses.
If your books are not clean enough to trust the P&L, fix that before you guess at an estimate.
2. Did owner pay change without a tax adjustment?
This is common in law firms.
The owner takes larger draws after a few good months, but no one increases reserves.
Or an S corp owner changes salary, distributions, or bonuses without revisiting withholding.
That disconnect is where June problems start.
3. Are collections lumpy enough to justify a more tailored method?
If your income is highly uneven, the annualized income installment method may be worth discussing with your tax advisor.
It can better match estimated payments to when income was actually earned, instead of forcing a flat-payment approach onto a lumpy business.
For contingency-fee firms especially, this can matter a lot.
4. Has the firm been reserving tax cash automatically?
If tax money lives in the operating account, it is usually not tax money anymore.
It becomes payroll money, hiring money, “we’ll replace it later” money, or distribution money.
A separate tax reserve account is not flashy, but it is one of the cleanest ways to reduce owner stress.
5. Are state estimates quietly becoming the bigger risk?
Federal rules get most of the attention, but state estimated tax systems do not always mirror federal rules cleanly.
For firms with multi-state income, remote staff, or owners in high-tax states, the state side can be where the real surprise shows up.
What to Do If Cash Is Tight in June
This is where many owners freeze.
If the June payment feels painful, that usually signals one of two issues.
Either the tax bill truly is bigger than expected, or the firm has a cash management problem that taxes are exposing.
In either case, silence makes it worse.
If cash is tight, do not default to a vague plan to “make it up later.”
Instead, make a deliberate choice.
A better response usually includes some combination of:
Paying as much as you reasonably can by the deadline instead of missing it entirely
Re-running current-year projections immediately
Reducing discretionary owner distributions until reserves are rebuilt
Looking at whether additional payroll withholding could help smooth the rest of the year
Identifying whether the real issue is weak collections, bloated overhead, or poor reserve habits
The key is to treat the June payment as information.
If writing the check feels unexpectedly hard, the problem is not just the deadline.
The problem is what the deadline is revealing.
That is actually useful.
It gives you a chance to correct the system before the September payment and year-end planning window.
How Smart Firms Use June as a Midyear Reset
The firms that handle June best usually do not have perfect numbers.
They just have a repeatable process.
A practical June tax reset can be as simple as this:
Close the books for May quickly.
Review year-to-date profit and owner pay.
Compare actual results to the original tax projection.
Adjust estimated payments and reserve percentages.
Decide whether current-year planning, safe harbor, or a hybrid approach makes the most sense.
That kind of review does more than prevent penalties.
It helps you answer bigger questions law firm owners actually care about:
Can I keep taking owner draws at the current level?
Is payroll still right for the size of the firm?
Are we growing profitably, or just getting busier?
Will September feel manageable, or are we setting up another cash crunch?
In my experience, the firms that feel calm about taxes by the fall usually make their biggest correction in June, not December.
The Real Opportunity Hidden Inside the June Deadline
June is not just a tax deadline.
It is one of the clearest midyear CFO moments a law firm owner gets.
Handled badly, it creates penalties, owner anxiety, and a second-half cash squeeze.
Handled well, it tells you whether your compensation, reserves, and collections are strong enough to support the rest of the year.
That is the bigger point.
A law firm with good tax planning does not just “pay on time.”
It uses tax deadlines to make better operating decisions before problems get expensive.
If your June estimate feels uncertain, that usually means you do not need more guesswork.
You need a tighter system for projections, owner pay, and tax reserves.
