Investment Perspectives

Tailoring return estimates for taxable investors

Aug 24, 2026|BlackRock Investment Institute

What a portfolio earns before taxes is only part of the story. Tax-aware capital market assumptions help investors make allocation decisions based on expected after-tax outcomes.

Traditional return assumptions are typically expressed before taxes, potentially overlooking an important driver of portfolio outcomes. For taxable investors, what matters is not just what a portfolio earns – but what remains after taxes.

That’s even more paramount in today’s environment of structurally higher government bond yields. Higher yields have raised the cost of ignoring taxes, particularly for assets that generate taxable income. Factoring taxes into return assumptions can change how investors assess opportunities across asset classes.

We show how tax-aware capital market assumptions can improve expected portfolio outcomes. In our analysis, they boosted expected after-tax returns by roughly half a percentage point without increasing risk.

The rise in global government bond yields has made the tax drag more meaningful, reducing the income taxable investors ultimately keep. See the chart.

Source:

BlackRock Investment Institute, with data from LSEG Datastream, August 2026.

Authors

Vivek Paul
Global Head of Portfolio Research – BlackRock Investment Institute
Paul Henderson
Senior Portfolio Strategist – BlackRock Investment Institute
Patrick Geddes
Aperio’s Chief Tax Economist
Lisa R. Goldberg
Senior Advisor, BlackRock SMA Solutions
Maryna Nazarian
Portfolio Strategist – BlackRock Investment Institute
Norbert Palmai
Portfolio Strategist – BlackRock Investment Institute

BII0826-5822987-EXP0827