Firm Valuation and the Uncertainty of Future Tax Avoidance

Abstract

The paper studies the effect of uncertainty in firm-specific tax avoidance on firm value. We first show in a clean surplus valuation model that expectations about future profitability interact with corporate tax avoidance. Two dimensions of corporate tax avoidance strategies matter for valuation: uncertainty and level of expected future tax rates. We confirm the importance of level and uncertainty of tax avoidance for forecasts of future tax rates using a small sample of analyst tax rate forecasts. Consistent with the model and the implications from analyst forecasts, we derive a tax signal-to-noise ratio based on historical tax information. In our sample of 2,820 firms, we show empirically that this tax signal-to-noise ratio amplifies the effect of pre-tax earnings on firm value. Pre-tax earnings have a stronger effect on firm value for firms with effective and persistent tax avoidance. Firms with volatile effective tax rates receive a discount on their earnings.