When Disputing Taxes, Should You Pay First or Fight First?
Receiving a tax notice can create an immediate practical problem: should you pay the amount the IRS or state tax agency says is due, or should you wait while you dispute it?
The answer depends on the type of tax, the procedural posture of the case, the amount at issue, the taxpayer’s cash position, the risk of accumulating interest, and the forum in which the taxpayer wants to preserve rights. There is no single answer that applies to every tax dispute. But there is a critical point taxpayers should understand early: in tax controversy, timing and procedure can be just as important as the substantive tax issue.
A taxpayer may have strong arguments on the merits and still lose important rights by missing a deadline, making the wrong type of payment, failing to designate a remittance correctly, or choosing the wrong procedural path.
Start With the Type of Liability
The first distinction is between self-assessed tax and proposed additional tax.
Self-assessed tax is tax the taxpayer reported as due on a filed return. If a taxpayer files a return showing a balance due, the IRS generally treats that amount as assessed. If it is not paid, interest and penalties can accrue. In that situation, there is usually no dispute over whether the tax was reported. The issue is collection, payment timing, penalty relief, or ability to pay.
A proposed additional tax is different. That may arise after an audit, an IRS notice, a state examination, a proposed adjustment, or a disagreement over how an item should be characterized. For example, the IRS may assert that income reported as capital gain should have been ordinary income, that a deduction should be disallowed, that a loss should be limited, or that a credit was not substantiated.
In proposed adjustment cases, the taxpayer may still have procedural options to contest the liability before paying. Those options should be evaluated before any remittance is made.
Interest Is Often the Cost of Waiting
Taxpayers frequently focus on the proposed tax and penalties, but interest can become a major part of the case. Federal tax underpayment interest generally runs from the original due date of the return until the liability is paid. Extensions of time to file do not extend the time to pay. Interest can apply to unpaid tax, penalties, and previously accrued interest.
Interest is not usually discretionary. The IRS generally does not waive interest simply because the taxpayer acted reasonably or relied on an advisor. Penalties may be abated in appropriate circumstances, but interest is usually mechanical unless a specific statutory or administrative basis for relief applies.
That means a taxpayer who chooses not to pay while disputing the liability is making an economic decision. If the taxpayer wins, the additional tax, penalties, and related interest may go away. If the taxpayer loses, interest may have continued accruing throughout the dispute.
Penalties Are Different From Interest
Penalties require separate analysis. Depending on the facts, penalties may be contested on legal, factual, procedural, or reasonable-cause grounds. Some penalties may be subject to reasonable cause relief. Others may turn on whether the taxpayer had substantial authority, made adequate disclosure, acted with reasonable reliance on a competent advisor, or had reasonable cause and good faith.
In some cases, penalty relief may be negotiated even where the underlying tax is not fully eliminated. In other cases, the penalty issue may become a major part of the dispute, particularly where the IRS asserts accuracy-related penalties, late filing penalties, late payment penalties, information return penalties, trust fund recovery penalties, or civil fraud penalties.
Taxpayers should not assume that paying the tax automatically resolves the penalty issue. Nor should they assume that disputing the tax automatically preserves every penalty defense. The penalty posture should be addressed directly.
Paying the Tax May Change the Forum
One of the most important procedural questions is whether the taxpayer wants to litigate before paying or after paying.
In many federal income tax deficiency cases, a taxpayer who receives a valid Notice of Deficiency has the right to petition the United States Tax Court without first paying the proposed tax. The Notice of Deficiency is often called a “90-day letter” because the taxpayer generally has 90 days from the date of the notice to file a Tax Court petition, or 150 days if the notice is addressed to a taxpayer outside the United States. The Taxpayer Advocate Service describes this notice as the taxpayer’s right to challenge the proposed adjustment in Tax Court without first paying.
That deadline is critical. If the taxpayer misses the Tax Court deadline, the IRS may assess the tax. At that point, the taxpayer may need to pay the liability and pursue a refund claim. If the claim is denied or not acted upon within the required period, the taxpayer may then pursue refund litigation in the appropriate federal court.
That is a very different procedural route. A taxpayer who could have gone to Tax Court before payment may find, after missing the deadline, that the only remaining judicial path requires full payment or payment of the divisible tax amount, depending on the type of tax involved.
Payment, Deposit, or Nothing: The Distinction Matters
A taxpayer disputing a proposed liability may have several options:
The taxpayer may make no payment while the dispute proceeds, accepting the risk that interest will continue to accrue if the government ultimately prevails.
The taxpayer may make a payment of tax, which can stop interest but may affect procedural rights and start refund claim timing issues.
The taxpayer may make a deposit under IRC § 6603, which can suspend the running of interest on potential underpayments while preserving certain dispute rights if properly handled.
These choices are not interchangeable.
A payment is generally treated as satisfaction of tax, penalties, or interest. If the taxpayer later disagrees, the taxpayer may need to file a refund claim. A deposit, by contrast, is not necessarily treated as a tax payment when made. It is a remittance intended to suspend interest on a potential underpayment while the dispute remains open.
However, the deposit must be properly designated. The taxpayer should identify the remittance as a deposit, specify the tax type and tax year, and identify the nature and amount of the disputed tax. IRS procedures require written designation. If the taxpayer simply sends money without proper designation, the IRS may treat the remittance as a payment, which may produce unintended procedural consequences.
Why a Deposit Can Be Useful
An IRC § 6603 deposit can be useful when the taxpayer wants to continue disputing the liability but also wants to limit the financial cost of losing. If the IRS ultimately prevails and the deposit is applied to the liability, interest is generally treated as stopped as of the date of the deposit, to the extent the deposit covers the tax ultimately due.
If the taxpayer wins, the deposit may be returned, subject to the applicable rules. The taxpayer may also be entitled to interest on a returned deposit in certain circumstances involving disputable tax.
This can be a valuable hedge. It allows the taxpayer to preserve the dispute while reducing or eliminating further underpayment interest exposure on the covered amount.
But deposits should be handled carefully. A taxpayer should not casually send a check or electronic payment and assume it will be treated as a deposit. The written designation, amount, year, tax type, and dispute description matter.
Why Some Taxpayers Still Choose Not to Pay
Despite the interest cost, many taxpayers choose not to pay while they dispute the liability. There are practical reasons for this. Some taxpayers cannot afford to pay the proposed amount. Others believe the government’s position is clearly wrong. Some worry that once the government has the money, the dispute posture may change. Others prefer to preserve cash for business operations, litigation costs, or settlement leverage.
Those considerations may be legitimate. But they should be weighed against the accumulating interest, the possibility of penalties, the non-deductibility of certain personal tax interest, and the risk that the dispute may take years to resolve.
A decision not to pay should be made consciously, with an understanding of the financial exposure.
State Tax Disputes Require Separate Analysis
The same general concepts apply in many state tax disputes, including California Franchise Tax Board matters, but the procedures are not identical. State agencies have their own notices, protest rights, appeal procedures, payment rules, interest provisions, penalty abatement standards, and refund claim requirements.
For California taxpayers, the timing of an FTB protest, Notice of Action, appeal to the Office of Tax Appeals, payment, refund claim, or collection hold can materially affect strategy. Interest and penalties may continue to accrue while the dispute proceeds. In some situations, paying first and pursuing a refund may be required or strategically preferable. In others, preserving pre-payment appeal rights may be more important.
Taxpayers should not assume that IRS procedure and state procedure are the same.
The Decision Framework
When deciding whether to pay, deposit, or wait, taxpayers should evaluate several questions, including, but not limited to
What type of notice has been issued?
Has the tax already been assessed, or is it only proposed?
Is there a deadline to file a Tax Court petition, protest, appeal, or refund claim?
Is the taxpayer trying to preserve pre-payment judicial review?
How strong is the taxpayer’s position on the merits?
How much interest will accrue if the dispute takes one, two, or three years?
Are penalties asserted, and are there reasonable-cause or procedural defenses?
Would payment create cash flow problems?
Would a deposit under IRC § 6603 reduce interest exposure without conceding the case?
Would paying convert the matter into a refund claim?
Are there related state tax consequences?
Are there collection risks if the taxpayer waits?
These questions should be addressed early, not after a deadline has expired or the IRS has already applied a remittance in an unintended way.
The Practical Takeaway
In a tax dispute, “pay or fight” is not always a binary choice. A taxpayer may be able to contest the liability without paying first, pay and sue for a refund, make a properly designated deposit to stop interest from running, or pursue administrative resolution while preserving litigation rights.
The best path depends on the procedural posture and the taxpayer’s broader goals. The wrong move can cost money, create unnecessary interest, limit forum options, or weaken the taxpayer’s position. The right move can preserve rights, manage interest exposure, and keep the case positioned for resolution.
The Karam Firm, PLLC advises taxpayers in IRS and state tax controversies, including audits, notices of deficiency, administrative appeals, refund claims, penalty disputes, deposits, payment strategy, and tax litigation positioning. If you have received an IRS or state tax notice and are deciding whether to pay, dispute, deposit, or appeal, contact The Karam Firm for additional information.
This article is for general informational purposes only and does not constitute legal or tax advice. Reading this article or contacting the firm does not create an attorney-client relationship. Tax deadlines are strict, and the correct strategy depends on the specific notice, tax year, forum, facts, and applicable law.
