What is portfolio rebalancing?

Rebalancing is the process of adjusting holdings so the portfolio returns toward a chosen target allocation.

How often should a portfolio be rebalanced?

There is no universal schedule. Some investors use time intervals while others act only when allocation drift exceeds a threshold.

Why use a minimum trade threshold?

A threshold can prevent small adjustments whose trading costs or operational effort outweigh the benefit of restoring a very small allocation difference.

ALLOCATION • RISK • DISCIPLINE

Portfolio Rebalancer

Calculate what to buy or sell to return to your target allocation.

Portfolio value0

Target total0

Purchases needed0

Sales needed0

Largest drift0

Assets to adjust0

New cash deployed0

Drift warnings0

Portfolio after new cash0

Estimated fees0

Extra cash needed0

Cash remaining0

Assets

Enter the current value and target percentage for each asset.

Add an asset from live market dataUnitsSelect a market, set units, then use the market price to add/update its current portfolio value.

Presets

Minimum trade threshold

Estimated fee per trade

Drift warning threshold

New cash to invest

Ignore adjustments below threshold

Asset	Current value	Current weight	Target weight	Target value	Drift	Shares	Price	Buy shares	Sell shares	Action	Amount	Est. fee

Allocation comparison

Current vs target vs after rebalancing.

CurrentAfter rebalanceTarget

PRACTICAL WORKFLOW

Rebalance with cash, thresholds and costs

Use new cash first

Contributions are applied to purchases before any sale is considered; sales only fund the portion that new money cannot cover.

Set a drift warning

Each row shows target weight, current weight and drift. A warning chip appears when drift exceeds the threshold you set (default ±5%).

Track share quantities

Optionally enter current shares and price per share to see how many shares to buy or sell for each asset.

Control trade size

The minimum trade threshold is measured in percentage points. Small deviations may be held to reduce unnecessary trades and costs.

Check funding

Fees are not silently ignored. The plan reports estimated fees, remaining cash or any additional cash needed to complete the displayed trades.

Method reviewed August 24, 2026 · Reference: Investor.gov guide to allocation and rebalancing.

Important: Targets use current portfolio value plus new cash. Fees are shown as a funding requirement; taxes, spreads and market impact are not included.