Portfolio Rebalancing Calculator

Calculate buy/sell amounts to rebalance portfolio to target allocation.
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Total Portfolio

$100,000.00

Rebalancing Actions

Stocks (65%)Sell $5,000.00
Bonds (25%)Buy $5,000.00
Cash (10%)Buy $0.00

Use the Portfolio Rebalancing Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

A Portfolio Rebalancing Calculator helps investors determine how much to buy or sell of each asset to restore their desired target allocation percentages. With market volatility expected to continue into 2026, maintaining proper asset allocation becomes crucial for managing risk and optimizing long-term returns.

The calculator compares your current portfolio value against your target allocation percentages to identify deviations. It calculates the dollar difference between actual and target amounts for each asset class, then determines the exact trades needed to rebalance back to your desired allocation.

Consider transaction costs and tax implications before rebalancing, as frequent adjustments can erode returns through fees and capital gains taxes. Most financial advisors recommend rebalancing when allocations drift more than 5-10% from targets, or at regular intervals like quarterly or annually.

Rebalancing a $100,000 Portfolio with 60/40 Stock/Bond Target

  1. 1 Current portfolio: $70,000 in stocks (70%) and $30,000 in bonds (30%), totaling $100,000. Target allocation: 60% stocks ($60,000) and 40% bonds ($40,000).
  2. 2 Calculate deviations: Stocks are $10,000 over target ($70,000 - $60,000), while bonds are $10,000 under target ($30,000 - $40,000).
  3. 3 The portfolio has drifted 10 percentage points from the target allocation due to stock appreciation, creating an overweight equity position that increases risk.
  4. 4 To rebalance: Sell $10,000 in stocks and buy $10,000 in bonds, restoring the 60/40 allocation and reducing portfolio volatility while maintaining the $100,000 total value.

Source: SEC · Last updated: April 2026

Frequently Asked Questions

How often should I rebalance my portfolio?
Rebalance annually or when any asset class drifts more than 5% from its target allocation. More frequent rebalancing increases transaction costs and taxes. Less frequent rebalancing allows larger drift from your intended risk level. Annual review is the most common approach.
How do I rebalance my portfolio?
Compare current allocations to your targets. Sell overweight assets and buy underweight ones to restore target percentages. In tax-advantaged accounts, sell freely. In taxable accounts, use new contributions and dividends to rebalance without selling, which avoids triggering capital gains taxes.
Does rebalancing improve returns?
Rebalancing does not guarantee higher returns but manages risk by preventing your portfolio from becoming too heavily weighted in one asset class. It enforces a "buy low, sell high" discipline by trimming winners and adding to laggards. The primary benefit is maintaining your intended risk level.

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