The standard the IRS applies
Reasonable cause means you exercised ordinary business care and prudence and still could not meet the obligation, or met it late, because of circumstances beyond your control. The IRS looks at the whole picture: what happened, when, how it prevented compliance, and how quickly you acted once the obstacle was gone. Serious illness, the death of a close family member, natural disasters, and the unavoidable loss of records are common examples. Being busy or forgetting is generally not enough, and a lack of funds alone usually is not either, though financial hardship can be considered for some payment penalties. Not knowing the law is rarely accepted on its own, unless the rule was complex and you made a genuine effort to learn it.
Advisers and the limits of reliance
Many requests involve a tax preparer or other adviser. Relying on a competent professional's substantive advice, such as whether a filing was required at all, can support reasonable cause if you gave the adviser complete information and the reliance was reasonable. Handing off a simple task, such as filing a return or making a payment on time, is treated differently: courts have generally held that the taxpayer stays responsible for meeting a known deadline even when someone else was supposed to handle it. If an adviser was involved, gather the engagement letter, emails, and the advice itself. These details often decide how the request is received.
Building the record
A reasonable cause request should read as a short, dated account supported by documents. Line up the deadline you missed, the event that interfered, how long it lasted, and the steps you took to comply afterward. Attach medical records, death certificates, insurance or police reports, disaster declarations, or correspondence showing efforts to obtain missing records. For accuracy-related penalties, the related defense focuses on your effort to report correctly, so documents showing how the return was prepared carry more weight. If the request is denied, appeal rights usually follow. We help assemble the timeline and decide whether to present reasonable cause, first time abatement, or both.
