Measures Allocation Drift
The calculator determines the percentage currently invested in every asset and compares it with your preferred target.
Smart Asset Allocation Tool
Portfolio Rebalancing Calculator
Compare your current investment allocation with your target strategy. The calculator shows the exact amount to buy, sell, or hold for every asset in your portfolio.
Enter Your Portfolio Details
Add each asset's current value and preferred target allocation.
Portfolio Assets
Target total:
100.00%
| Asset Name | Current Value | Target % | Current % | Remove |
|---|---|---|---|---|
| 50.00% | ||||
| 20.00% | ||||
| 25.00% | ||||
| 5.00% |
Your Rebalancing Plan
Review the suggested trades required to reach your target allocation.
Current Portfolio
$0.00
Portfolio After Cash
$0.00
Total Suggested Buys
$0.00
Total Suggested Sales
$0.00
| Asset | Current Value | Current % | Target % | Target Value | Difference | Action |
|---|
Purpose of the Tool
What Is a Portfolio Rebalancing Calculator?
A portfolio rebalancing calculator measures how far your current investments have moved from your intended asset allocation.
Calculates Target Values
It converts each target percentage into the exact monetary value that should be allocated to that investment.
Generates Trade Amounts
You receive a clear buy, sell, or hold recommendation based on the difference between current and target values.
How to Use the Portfolio Rebalancing Calculator
You can calculate a new portfolio allocation in a few straightforward steps.
1
Select Your Currency
Choose the currency used for your investment account.
2
Enter Current Asset Values
Add the current market value of stocks, bonds, cash, funds, property investments, or other portfolio assets.
3
Enter Target Percentages
Define how much of the final portfolio you want allocated to each asset. The percentages must total 100%.
4
Add New Investment Cash
Include any cash you plan to contribute before rebalancing. Enter zero when no new money will be added.
5
Review Suggested Trades
Calculate the results and review how much of each investment may need to be purchased or sold.
How the Calculation Works
The tool first adds the market value of all assets to determine the current portfolio value. It then includes any additional cash contribution.
Final Portfolio Value = Current Portfolio Value + New Cash
The target monetary value for each asset is calculated by multiplying the final portfolio value by the target allocation percentage.
Target Asset Value = Final Portfolio Value × Target Allocation
Finally, the calculator compares the target value with the asset's existing value.
Rebalancing Amount = Target Value − Current Value
- A positive result indicates an amount to buy.
- A negative result indicates an amount to sell.
- A small difference within your tolerance may be treated as a hold.
Why Rebalance?
Why Portfolio Rebalancing Matters
Market movements can gradually change your exposure to risk, even when you make no changes to your investments.
Maintain Your Risk Level
Strong performance from one asset may make it a much larger part of your portfolio than originally planned. Rebalancing can restore your intended risk profile.
Stay Aligned With Your Plan
A target allocation reflects your time horizon, investment goals, and risk capacity. Rebalancing keeps the portfolio connected to that strategy.
Reduce Emotional Decisions
A rules-based rebalancing process may help reduce impulsive buying and selling caused by short-term market movements.
Common Rebalancing Strategies
Calendar-Based Rebalancing
You review your portfolio at a fixed interval, such as every six or twelve months, and make adjustments when necessary.
Threshold-Based Rebalancing
You rebalance whenever an asset moves beyond a predetermined tolerance, such as 5 percentage points away from its target.
Cash-Flow Rebalancing
You direct dividends, interest, or new contributions toward underweight assets. This approach may reduce the need to sell existing investments.
Hybrid Rebalancing
You review the portfolio on a regular schedule but trade only when allocations exceed your selected tolerance limits.
Important Factors Before Trading
- Consider brokerage commissions and transaction costs.
- Review possible capital gains taxes before selling appreciated investments.
- Confirm that your target allocation still matches your financial goals.
- Consider account rules, withdrawal restrictions, and minimum trade amounts.
- Avoid making unnecessary trades for very small allocation differences.
- Evaluate your complete portfolio across retirement, brokerage, and savings accounts.
Investment Disclaimer
This calculator provides estimates for educational purposes. It does not account
for taxes, fees, liquidity, investment suitability, or personal financial circumstances.
Consider speaking with a qualified financial professional before executing trades.
Frequently Asked Questions
Portfolio Rebalancing Calculator FAQs
Find answers to common questions about asset allocation and portfolio rebalancing.
Portfolio rebalancing is the process of adjusting your investments so that
their percentages return to your chosen target allocation. This may involve
buying underweight assets, selling overweight assets, or directing new cash
toward selected investments.
Some investors review their portfolios quarterly, every six months, or once
per year. Others rebalance only when an asset moves beyond a specific threshold.
The suitable schedule depends on portfolio size, costs, taxes, and investment strategy.
Yes. All target percentages entered into this calculator must total exactly
100%. This ensures that the entire future portfolio value is allocated among
the listed assets.
Sometimes. You may direct new contributions, dividends, or interest toward
underweight assets. This can move the portfolio closer to its target while
reducing sales, taxes, and transaction costs.
Allocation drift is the difference between an asset's current percentage and
its target percentage. For example, an asset currently representing 45% of a
portfolio has a 5 percentage-point drift when its target is 40%.
The tolerance tells the calculator when a difference is small enough to be
treated as a hold. For example, with a 1% tolerance, an asset whose current
allocation is within one percentage point of its target may not require action.
No. The results are based only on current values, target percentages, and
additional cash. Taxes, commissions, spreads, withdrawal penalties, and
other investment costs should be evaluated separately.
Yes. You can enter any asset category with a measurable current value and a
desired target allocation, including stocks, ETFs, mutual funds, bonds,
cryptocurrency, commodities, and cash.