Money-Weighted Return vs Time-Weighted Return: Which One Matters?

Two Metrics, Two Different Questions

If you have ever compared your portfolio return to a benchmark and felt confused by the numbers, you are not alone. The investing world uses two main ways to measure returns, and they often give different answers for the same portfolio.

Money-Weighted Return (MWR) tells you: "Given when and how much I invested, what was my personal rate of return?"

Time-Weighted Return (TWR) tells you: "How did the investments themselves perform, regardless of when I added or withdrew money?"

Both are legitimate. Neither is wrong. But they answer fundamentally different questions - and using the wrong one leads to wrong conclusions.

What Is Money-Weighted Return?

Money-Weighted Return (also known as Internal Rate of Return, or IRR) accounts for the timing and size of every cash flow in your portfolio. It finds the single discount rate that makes all your deposits, withdrawals, and your ending portfolio value balance out mathematically.

Why MWR Matters

MWR reflects your actual, personal investment experience. It captures whether you added money at good times or bad times.

Example:

Imagine a fund that returns +20% in the first half of the year and -10% in the second half.

• Investor A puts in $10,000 at the start. At mid-year it is worth $12,000. Then it drops 10% to $10,800 by year-end.
• Investor B puts in $1,000 at the start ($1,200 at mid-year), then adds $9,000 in July. That combined $10,200 drops 10% to $9,180 by year-end.

The fund's performance is identical in both cases. But Investor A ends with $10,800 on a $10,000 investment - a positive personal return. Investor B ends with $9,180 on $10,000 total invested - a negative personal return, because most of the money went in right before the decline.

MWR captures this difference. It tells each investor what their specific experience was.

When to Use MWR

• Evaluating your personal investment performance
• Understanding if your timing of contributions helped or hurt
• Measuring returns on portfolios with irregular cash flows
• Answering "how much did I actually make?"

What Is Time-Weighted Return?

Time-Weighted Return eliminates the effect of cash flows entirely. It breaks your portfolio into sub-periods (between each deposit or withdrawal), calculates the return for each sub-period, and then links them together geometrically.

Why TWR Matters

TWR is the standard for evaluating fund managers and investment strategies because it strips away the impact of investor behavior. A fund manager does not control when investors deposit or withdraw money, so it would be unfair to judge them on that.

Using the same example above:

Both investors would see the same TWR: the fund returned +20% then -10%, giving a TWR of approximately +8% for the year. This is the fund's performance - independent of who invested when.

When to Use TWR

• Comparing your portfolio against a benchmark index
• Evaluating a fund manager's skill
• Comparing investment strategies on equal footing
• Answering "how did the investments perform?"

MWR vs TWR: A Side-by-Side Comparison

Here is when the two metrics diverge significantly:

Scenario: Good Timing

You invest $5,000. The market drops 20%. You invest another $15,000 at the bottom. The market recovers 25%.

• TWR: The market went down 20% then up 25% - about 0% total. Not great.
• MWR: Most of your money ($15,000) was invested at the bottom and caught the 25% recovery. Your personal return is strongly positive.

Your MWR is much higher than TWR. You timed it well.

Scenario: Bad Timing

You invest $15,000. The market drops 20%. You panic and add only $5,000. The market recovers 25%.

• TWR: Same as above - approximately 0%.
• MWR: Most of your money ($15,000) experienced the full decline. Your personal return is negative or barely positive.

Your MWR is lower than TWR. Your timing hurt you.

Scenario: No Cash Flows

You invest once and never add or withdraw.

• TWR and MWR are identical. With no cash flows to differ on, both metrics give the same answer.

This is why the distinction only matters when you have deposits and withdrawals - which, for most real-world investors, is always.

Which One Should You Care About?

For most individual investors, MWR is the more useful metric. It answers the question you actually care about: "What return did I earn on my money?"

That said, TWR has its place:

• If you want to evaluate whether your stock picks are good (separate from your timing), TWR helps.
• If you are comparing your portfolio to the S&P 500, TWR is a fairer comparison - since the index does not have cash flows.
• If you invest a fixed amount monthly (dollar-cost averaging), the gap between MWR and TWR is usually small.

The most valuable approach? Look at both. If your MWR is significantly higher than TWR, your timing is adding value. If MWR is lower, your timing is costing you - even if the underlying investments are doing fine.

How Turbobulls Calculates Both

Turbobulls computes your Money-Weighted Return automatically with every transaction you log. Every deposit, withdrawal, dividend, and fee is factored into the calculation in real time.

Here is what you get:

• MWR and annualized MWR on your portfolio dashboard, updated with every transaction
• Per-position MWR so you can see timing effects on individual holdings
• Segment-level MWR - break down returns by broker, asset type, currency, or custom tags to see where your timing is helping versus hurting
• Return components - see how much of your return comes from capital gains, currency effects, and income (dividends), all feeding into your MWR

Because Turbobulls handles multi-currency portfolios natively, your MWR accounts for currency effects too. A US stock that returned 10% in USD but only 7% in EUR (because the dollar weakened) - that currency impact shows up in your return breakdown.

All the math happens behind the scenes. You log your transactions, and Turbobulls does the rest. No formulas, no spreadsheets, no guesswork.

For a deeper dive into all the performance metrics Turbobulls tracks, check out our help center or the full performance metrics guide.

Stop Guessing, Start Measuring

Understanding MWR vs TWR is not just academic - it changes how you evaluate your own investing. Are you a good stock picker with bad timing? A mediocre picker who buys at the right moments? You cannot know without measuring both.

Turbobulls gives you the tools to answer these questions without doing any math yourself. Start a free trial at app.turbobulls.com and see exactly how your portfolio is really performing.