US court denies interest on overpayments applied to transition-tax instalments

Pitney Bowes elected under section 965(h) to pay the mandatory repatriation tax in eight annual instalments. It sought interest on 2017 regular-income-tax overpayments that the IRS retained and applied against later instalments, arguing those amounts were not yet due. The court granted the government’s cross-motion for summary judgment and denied the company’s motion.^[1]

Section 965(h) permits payment over eight years but calculates net tax liability for a single taxable year. The court held that the instalment election did not move portions of the underlying income-tax liability into later tax years. Its discussion distinguished the different statutory treatment available to real estate investment trusts; the decision should not be generalised across every deferral regime.^[1][2]

The court read sections 6402 and 6403 as authorising credits against the unpaid tax and instalments. Because the full transition-tax liability had not otherwise been satisfied, the retained amounts did not generate the overpayment interest sought under section 6611. The opinion distinguishes an overpaid instalment from an overpayment of the entire tax.^[1]

The result concerns historic transition-tax payments, credits and interest. It does not announce a new return deadline or change instalment percentages. Groups reviewing comparable claims should reconcile the original tax year, full liability, actual credits and interest computation rather than assume that a payment election creates a separate annual tax liability. The opinion identifies other pending cases but does not decide them.^[1]