The list of companies using Instant Interest is a veritable Who’s Who of American business. Twenty-one of the top fifty Fortune 500 companies use Instant Interest. Our customers represent leaders in the following businesses:

Accounting/tax services Hotel
Advertising, Marketing Household and Personal Products
Aerospace/Defense Industrial Machinery
Airlines Information Technology and Services
Banks Insurance
Beverages Lawyer
Building Materials Life Science Research
Chemicals Mail, Package and Freight Delivery
Construction Materials Manufacturing: Diversified
Diversified Financial Medical Products
Diversified Manufacturing Metals
Diversified Outsourcing Services Mining, Crude – Oil Production
Education Miscellaneous
Electronics, Electrical Equipment Motor Vehicles and Parts
Energy Oil and Gas Equipment
Engineering, Construction Packaging Containers
Entertainment Petroleum Refining
Financial Data Services Pharmaceuticals
Financial Services Pipelines
Financial: Investments Professional Services
Food and Drug Stores Publishing, Printing
Food Consumer Products Railroads
Food Packaging Real Estate Services
Food Production Retail
Food Services Semiconductors
Forest and Paper Products Telecommunications
General Merchandising Tobacco
Health Care Information Technology Tools
Health Care: Insurance and Managed Care Trucking, Truck Lines
Health Care: Medical Facilities Uniforms
Health Care: Pharmacy and Other Services Utilities: Gas and Electric
Home Equipment, Furnishings Wholesalers

Whatever your business, if you need to calculate interest on tax overpayments or underpayments, then Instant Interest is for you.

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