Rebalancing Trigger Calculator

See when to rebalance your portfolio based on drift from target allocations.

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Portfolio Rebalance

Enter your target and current allocations to see if it's time to rebalance.

Rebalancing needed?
No
Max drift: 0%
Stocks target
$0
Stocks current
$0
Stocks drift
0%
Bonds target
$0
Bonds current
$0
Bonds drift
0%

Worked example

With the default inputs shown below, this calculator returns the following results:

InputValue
Total portfolio value ($)$500,000
Target stocks (%)60%
Current stocks ($)$330,000
Target bonds (%)30%
Current bonds ($)$140,000
Rebalancing threshold (%)5%
ResultValue
Rebalancing needed?Yes β€” rebalance
Stocks target$300,000
Stocks current$330,000
Stocks drift+10.0%
Bonds target$150,000
Bonds current$140,000

Values shown are produced by this page in your browser; change any input to update them.

How to use the Portfolio Rebalance

  1. Total portfolio value ($) β€” default $500,000
  2. Target stocks (%) β€” default 60%
  3. Current stocks ($) β€” default $330,000
  4. Target bonds (%) β€” default 30%
  5. Current bonds ($) β€” default $140,000
  6. Rebalancing threshold (%) β€” default 5%
  7. Press Calculate to update the results instantly.

Frequently asked questions

Either on a calendar (annually or semi-annually) or when an allocation drifts more than 5 percentage points from target. Both work; consistency matters more.
Rebalance when an asset drifts 5 percentage points, or 25% of its target weight, whichever is smaller. It avoids trivial trades.
In taxable accounts yes, because sales create capital gains. Rebalance with new contributions first, then inside tax-advantaged accounts.

Sources & references