DMI's flagship interest and penalty software InterestNet™ is a single product solution for interest calculations on federal IRS and state tax underpayments and overpayments. InterestNet™ is the industry standard interest and penalty computation software and accurately computes global interest netting benefit per Section 6621(d). The user-friendly interface allows for easy entry of transcript detail while providing the flexibility to perform restricted interest computations, evaluate alternative interest results for hypothetical events, and perform "what if?" scenario development.
The IRS uses InterestNet™ to perform net rate interest netting computations, per IRM 188.8.131.52. Be confident your interest results are accurate with InterestNet™.