Savings plan or lump sum? What studies and data show

If you have a larger sum, from an inheritance or a bonus, say, you face a choice: put it into Bitcoin all at once, or spread it over a few months? Statistics mostly favours the lump sum; psychology often favours staggering – we’ll weigh both with you.

Two questions that often get mixed up

1. You save from your ongoing income. Then there’s no choice: a savings planGlossarySavings plan (Bitcoin savings plan)Automatically buying bitcoin at fixed intervals with a fixed amount, for example $50 a month. A savings plan takes the question of the right moment off your hands, but doesn’t promise a higher return.On the learning path: Stage 4 · Step 4 – Setting up a savings plan →In the glossary →× is the natural form. Vanguard also leaves this kind of saving out of its study.^[1]
2. You already have a sum. Then you can invest it straight away or spread it over a few months. That’s what this article is about.

What the Vanguard study shows

In 2023, the fund provider Vanguard compared two approaches for the global equity index MSCI World (1976 to 2022): investing a sum straight away or in three equal monthly instalments – each assessed after one year.^[1]

68%

Lump sum ahead

versus three monthly instalments

+2.2%

Median lead

after one year, 100% equities

69%

Instalments beat cash

staggering beats waiting

• Even with interest on the money waiting to be invested, the lump sum still came out ahead in 65% of cases.
• Staggering came out ahead mainly when prices fell after the start.
• The longer you stagger, the more it costs on average, because more money sits without a return for longer.
• For cautious investors, for whom a loss hurts much more than an equal gain pleases (loss aversion), a staggered entry was the better fit in the model: it softens the pain of an early slump and helps them stick to the plan.^[1]

The cost-averaging effect: maths, not a return advantage

Savings-plan advertising likes to cite the cost-averaging effectGlossaryCost averaging (DCA)If you regularly invest a fixed amount, you buy more when prices are low and less when they are high. With fluctuating prices, your average cost ends up below the average price – but that doesn’t mean a higher return than investing straight away.On the learning path: Stage 4 · Step 4 – Setting up a savings plan →In the glossary →×: with fixed amounts, you buy more when prices are low and less when they are high. An example with three purchases of $300 each at made-up prices:

Purchase	Example price	Amount	Quantity bought
1	$60,000	$300	0.00500 BTC
2	$40,000	$300	0.00750 BTC
3	$80,000	$300	0.00375 BTC
Total	Avg. $60,000	$900	0.01625 BTC

Your average price comes to around $55,400 ($900 ÷ 0.01625 BTC) – below the average of the three prices. That always holds when prices fluctuate.

And with Bitcoin?

We ran the same question with Bitcoin: invest $1,200 straight away, or $100 a month for twelve months. Starting in every month from May 2013 to August 2025, buying at the monthly closing price in US dollars, assessed twelve months after the start, excluding fees (own calculation, data up to the end of August 2026):^[2]

66%

Lump sum ahead

148 start months, versus twelve monthly instalments

+22%

Median lead

value after one year

A later assessment date changes nothing: after the last instalment, both variants hold a fixed amount of BTC, so the percentage gap stays the same. The lump sum won about as often as with shares, but with Bitcoin the gap is much larger – in both directions:

Start	Assessed	Lump sum $1,200	Savings plan 12 × $100
October 2021 (near the high at the time)	end of 2022	$323	$626
December 2018 (near the low at the time)	end of 2020	$9,421	$5,906

Starting in October 2021, the lump sum was around 73% down at the end of 2022, the savings planTermSavings plan (Bitcoin savings plan)Automatically buying bitcoin at fixed intervals with a fixed amount, for example $50 a month.On the learning path: Stage 4 · Step 4 – Setting up a savings plan →In the glossary →AdLicensed providers with a paid linkProviders from our comparison21bitcoinBitcoin app · MiCA (FMA, Austria)No paid link for your country · Profile →RelaiBitcoin app · MiCA (AMF, France)No paid link for your country · Profile →BISONExchange · MiCA (BaFin, Germany)No paid link for your country · Profile →All 11 compared – including non-partners →*Paid link: if you sign up or buy through it, we earn a commission. Your price stays the same. How we make money →18+ · Crypto assets are highly volatile; you could lose all your money. No deposit protection.× around 48%.^[2] Starting in December 2018, it was the other way round. Nobody knew this in advance, and past prices are no forecast. The DCA calculator runs historical savings plans from a start month of your choice – including the lowest interim value.

Dive deeperAnd if you had bought right at the peak?

Buying at a cycle’s highest monthly close (November 2013, December 2017, October 2021), it took the lump sum 29 to 39 months to get back to the purchase price. Twelve instalments of $100 from the same month were back in profit after 17 to 31 months (counted from the start). At the 2025 high (highest monthly close in July 2025, around $115,750), both variants were down at the end of August 2026: the lump sum by around 32%, the savings plan by around 5% (own calculation).^[2] For comparison, the current price is $86,292.

The real benefit: psychology

Say you invest $12,000 all at once, and a month later the price is 30% lower: on paper, $3,600 is gone. Many people sell at that point and turn a fluctuation into a real loss. Bitcoin’s high volatilityGlossaryVolatilityA measure of how strongly a price fluctuates, usually given as annualised standard deviation in per cent. Bitcoin fluctuates much more than a broad stock index or gold – up and down.On the learning path: Stage 3 · Step 3 – Returns & risk →In the glossary →× makes this more likely than with an equity fund. A staggered entry helps in three ways:

• Less regret: if the price falls after the first instalment, the next ones buy more cheaply.
• No timing question: the dates are fixed.
• Staying the course: a plan you stick to beats a better one you abandon in the first slump.

What costs most is the urge to buy on the back of market mood (FOMOGlossaryFOMO (fear of missing out)‘Fear of missing out’. With Bitcoin, it’s the urge to buy quickly after sharp price rises. FOMO is a common trigger for costly bad decisions.On the learning path: Stage 3 · Step 2 – Goal first →In the glossary →×). The Bank for International Settlements (BIS) studied crypto-app users in 95 countries from 2015 to 2022: new users arrived mainly after price rises, and in almost all of these countries the majority are likely to have lost money on Bitcoin.^[3] More in Psychology & discipline.

How to decide

1. Check whether the sum belongs in Bitcoin

   Before the ‘how’ comes the ‘whether’: an emergency fund in place, no expensive debt, and only an amount whose loss you could cope with. More in Financial foundations first.

2. Do the crash test

   What would you do if the price fell by 30 to 50% straight after you bought? If the honest answer is ‘sell’, there’s a lot to be said for a staggered entry – or for a smaller amount.

3. Set the period – and keep it short

   Set the number and dates of the instalments in advance and write them down – the longer the period, the more the waiting costs. Don’t extend it because the price is falling, and don’t cut it short because it’s rising. A middle way is a plan too: part straight away, the rest in a few instalments.

4. Check the costs

   Fixed fees per purchase make small instalments expensive: $1 is 1% of $100, but only 0.1% of $1,000. With percentage fees, the number of instalments hardly matters. More in Understanding fees.

5. Think about tax

   Each instalment is a separate purchase with its own holding periodGlossaryHolding period (speculation period)In Germany, the gain from selling privately held bitcoin is tax-free if more than one year passes between purchase and sale (§ 23 EStG, as of September 2026). Each purchase has its own holding period.On the learning path: Stage 6 · Step 3 – Bitcoin & tax →In the glossary →×. Under current German law, gains are tax-free if more than one year passes between purchase and sale (as of September 2026).^[4] A draft bill from the Federal Ministry of Finance would end this for purchases from 2027 – including later instalments of a plan that runs into 2027. It has not been passed.^[5] The reform tracker follows the latest; other countries have their own rules (see Bitcoin tax around Europe). Keep the statements for all instalments.

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