Home > Personal > Personal Lending > Mortgage > Mortgage Resources > Glossary > Tax Base Tax Base November 9, 2021 The total value of property, income, or other taxable assets subject to taxation.You Might Also Like: Living QuartersSpring Maintenance Checklist for Your Home All Things CommunityHoli-days of Giving 2022 Everyday MoneyGiving Back During the Holiday Season Living QuartersYour Top Mortgage Questions Answered Living QuartersHow to Understand Mortgage Language