The calculator is useful for contribution and long-run scenario maths. It uses a smooth return assumption and does not simulate real market volatility.
When a fixed-amount recurring investment plan continues through a market fall, the same contribution buys more units at lower prices. That can lower the average purchase price, but it does not guarantee a profit: The investment still needs to recover enough, and the underlying asset can continue falling or permanently lose value.
What changes when the market price falls?
If you invest the same amount on a fixed schedule, a lower price buys more units and a higher price buys fewer. AMFI describes this as cost averaging for regular investors; Investor.gov describes the same general mechanism as dollar-cost averaging.
A lower average purchase cost is not a profit guarantee
AMFI explicitly notes that cost averaging does not assure profit and does not protect against investment losses in declining markets. If the underlying investment keeps falling or fails to recover, the portfolio can still lose money.
Regular investing mainly changes the timing problem
A recurring plan avoids making one large decision about the perfect entry date. It spreads purchases across many market levels. SEBI investor education specifically addresses the question of continuing recurring investment plans through volatile markets, while the U.S. Investor.gov definition describes dollar-cost averaging as equal investments at regular intervals regardless of market ups and downs.
When should the plan itself be reviewed?
Market movement alone is not the only consideration. Revisit the plan if the goal, time horizon, emergency liquidity, debt position, risk tolerance or underlying investment has changed. A contribution schedule should not force you to ignore short-term financial stability.
What the Carrowmont calculator can and cannot show
Carrowmont can illustrate how recurring contributions, time and an assumed annual return interact. It does not model daily market prices, volatility, sequence of returns, fund selection, taxes or fees. A smooth projection should therefore not be interpreted as the path an actual investment will take.
cost averaging changes the number of units, not the risk of the asset
The mechanics are simple. If $500 buys a fund at NAV $100, you receive 100 units. If the NAV later falls to $80, the same $500 buys 125 units. If it falls to $50, you buy 200 units. Your average cost per unit can decline, but your account value may still be below the amount contributed while prices are depressed.
| Month | Contribution | Illustrative price/NAV | Units bought |
|---|---|---|---|
| 1 | $500 | $100 | 100.0 |
| 2 | $500 | $80 | 125.0 |
| 3 | $500 | $50 | 200.0 |
| 4 | $500 | $70 | 142.9 |
Across the four months you contributed $2,000 and bought about 567.9 units, an average cost of about $70.43 per unit. That arithmetic is useful, but it should not be confused with a guarantee that the price will rise above $70.43.
A market fall can be helpful for an accumulator and dangerous for a near-term goal
A long-horizon investor who is still earning and contributing may welcome lower prices if the investment remains suitable. Someone who needs the money soon has a different problem: The loss may occur just before withdrawal. The same price decline can therefore have opposite planning implications depending on time horizon.
The biggest behavioural risk is stopping without revisiting the plan
People often stop contributions after a fall because the recent loss feels like evidence that investing is not working. That may convert a temporary market decline into a permanent change in the savings plan. On the other hand, continuing automatically into an investment whose fundamentals, fees or suitability have changed is not disciplined either. The decision should be about the plan and the asset, not just the latest price movement.
Questions to ask before changing a recurring investment plan during a downturn
- Has the financial goal or time horizon changed?
- Is the underlying fund or investment still doing what it was chosen to do?
- Do you still have enough emergency liquidity to continue contributions comfortably?
- Is the portfolio diversified, or is the recurring investment plan concentrated in one sector, theme or high-risk asset?
- Are you reacting to market headlines, or to a material change in your own financial capacity?
What a recurring investment plan cannot do
- It cannot eliminate market risk or guarantee a positive return.
- It cannot turn a poor-quality or unsuitable asset into a good investment merely through averaging.
- It does not protect a short-term goal from a large decline near the withdrawal date.
- It does not guarantee a lower average cost than a lump-sum investment made at a lower earlier price.
Recovery math explains why deep losses deserve respect
A 20% loss requires a 25% gain to recover. A 50% loss requires a 100% gain. Recurring contributions can improve the average purchase price, but they do not erase the asymmetric recovery math of the existing portfolio. This is why concentration in one risky asset can remain dangerous even for a long-term regular investor.
| Drawdown | Gain needed to return to starting value |
|---|---|
| −10% | +11.1% |
| −20% | +25% |
| −30% | +42.9% |
| −50% | +100% |
Liquidity decides whether you can stay invested
The ability to continue a recurring investment plan during a downturn often depends less on courage than on cash flow. An emergency reserve and manageable debt reduce the chance that job loss or a household shock forces you to stop contributions or sell assets after prices have fallen.
Distinguish broad-market decline from investment-specific deterioration
“Buy more because it is cheaper” is not a universal rule. A diversified market can recover as economies and profits evolve; an individual company, sector or product can suffer permanent impairment. Review whether the investment still fits the original role rather than reacting only to its lower price.
Lower prices change purchase mechanics, not the quality of the investment
| Reason for changing the plan | Worth reviewing? | Why |
|---|---|---|
| The market is down this month | Not by itself | A price move alone does not say whether the long-term plan is still suitable |
| Your goal is now close | Yes | There may be less time to recover from a further fall |
| Income or emergency savings weakened | Yes | Liquidity can matter more than continuing the same contribution |
| The investment is poorly diversified or no longer suitable | Yes | Cost averaging does not repair concentration or product risk |
Cost averaging is a purchase pattern. It does not turn a weak investment into a strong one and it does not predict when prices will recover.
Checklist: Before changing a recurring investment during a downturn
- Recheck the goal date and how soon the money may be needed.
- Protect emergency liquidity and essential cash flow.
- Confirm the investment still fits the goal and risk capacity.
- Check diversification rather than focusing only on the latest price.
- Separate a broad-market decline from investment-specific deterioration.
- Do not assume lower prices guarantee future profit.
- If the plan changes, write down the reason so the decision can be reviewed later.
Frequently asked questions
Should I increase my recurring investment plan when markets fall?
That is a personal allocation decision. From a planning perspective, first confirm that emergency liquidity, time horizon and diversification remain appropriate. A market fall alone is not enough information to determine the right contribution.
Does cost averaging always reduce the average purchase price?
It buys more units at lower prices and fewer at higher prices, but the final average depends on the full price path. It does not guarantee that the average will be below the final market price.
What if my goal is only two or three years away?
A short remaining horizon changes the risk problem. Money required soon may need a different risk profile from long-term accumulation, regardless of whether prices currently look attractive.
Sources and how this guide was prepared
This Carrowmont guide was drafted with AI assistance, then structured and checked against the cited external sources and Carrowmont calculation conventions. Worked examples are illustrative, use simplified assumptions, and are not forecasts or individualized recommendations.