Daily vs weekly DCA, and monthly DCA too, finish close when the monthly total is the same. We backtested all three at exactly $300 a month on real daily Bitcoin prices. Across January 2016 to September 2026, the gap between the best and worst end value was 2.59%. Across the rising years 2023 to 2024 it was 3.64%. The falling year, 2022, produced the widest gap at 6.10%, and there the daily lane won. What separates the schedules is not the final stack: it is the number of buys (3,926 daily against 129 monthly), what a fixed per-buy fee does to small buys, and which schedule a real person keeps running through a drawdown.
Frequency is one of the most argued settings in a DCA plan, and one of the least consequential. In our wider comparison of the best DCA strategy, timing disciplines fought over whole market cycles; frequency fights over single-digit percentages. Make the choice on fees and behaviour instead.
How the Test Was Set Up
Three lanes, one budget. Each lane spends exactly $300 per calendar month inside the window, on the same daily BTC/USD closing prices (Coinbase series, 2015 to 29 October 2026):
- Daily: a buy every day, about $9.86 each.
- Weekly: a buy every Monday, about $69 each.
- Monthly: $300 on the 1st of each month.
Daily and weekly amounts are the window budget divided by that lane’s number of buys.
Because the per-buy amounts are solved from the budget, every lane spends the same total to the cent in each window; only the timing differs. Three windows: the full period, January 2016 to September 2026 (129 months, $38,700 per lane, valued at the 30 September 2026 close of $83,556.14); the falling year 2022 ($3,600, valued at $16,530.35); and the rising years 2023 to 2024 ($7,200, valued at $93,354.22). The script behind every number sits with this draft, so anyone with the price file can reproduce it all.
Daily vs Weekly DCA Over the Full Period: 2016 to 2026
| Lane | Buys | Per buy | Total in | BTC accumulated | Average cost | End value |
|---|---|---|---|---|---|---|
| Daily | 3,926 | $9.86 | $38,700.00 | 10.4652 BTC | $3,697.98 | $874,428.48 |
| Weekly (Mon) | 561 | $68.98 | $38,700.00 | 10.4536 BTC | $3,702.09 | $873,458.73 |
| Monthly (1st) | 129 | $300.00 | $38,700.00 | 10.7246 BTC | $3,608.54 | $896,103.34 |
The monthly lane won the full period, by $22,644.61 over the weekly lane: a 2.59% gap after almost eleven years, real money and a small difference at the same time. Part is mechanical: a buy on the 1st puts each month’s budget to work at the earliest average date, which helped across a period that mostly rose. Part is luck in which days a schedule lands on: move the monthly buy to the 15th and the ranking shuffles. Day choice moves results by about as much as frequency does, as our test of the best time and day to DCA Bitcoin found. Daily and weekly finished within $969.75 of each other.
Daily vs Weekly DCA in a Falling Market: 2022
| Lane | Buys | Per buy | Total in | BTC accumulated | Average cost | End value |
|---|---|---|---|---|---|---|
| Daily | 365 | $9.86 | $3,600.00 | 0.1447 BTC | $24,883.25 | $2,391.54 |
| Weekly (Mon) | 52 | $69.23 | $3,600.00 | 0.1441 BTC | $24,979.54 | $2,382.32 |
| Monthly (1st) | 12 | $300.00 | $3,600.00 | 0.1364 BTC | $26,401.96 | $2,253.97 |
In the falling window the ranking reversed: daily won, monthly finished last, and the gap widened to 6.10%. As 2022 fell, the daily lane kept meeting lower prices with fresh money all the way down, while the monthly lane committed $300 chunks early in each month, including the expensive first quarter, and held a higher average cost ($26,401.96 against $24,883.25). Frequency matters most in a grind down, and even here it was worth about $138 on $3,600 of buying.
The Rising Window: 2023 to 2024
| Lane | Buys | Per buy | Total in | BTC accumulated | Average cost | End value |
|---|---|---|---|---|---|---|
| Daily | 731 | $9.85 | $7,200.00 | 0.1869 BTC | $38,532.54 | $17,443.71 |
| Weekly (Mon) | 105 | $68.57 | $7,200.00 | 0.1872 BTC | $38,468.44 | $17,472.77 |
| Monthly (1st) | 24 | $300.00 | $7,200.00 | 0.1937 BTC | $37,180.37 | $18,078.10 |
In the rising window the monthly lane won again, by 3.64% over the daily lane, consistent with the earliest-average-buy-date effect: when prices climb within most months, buying on the 1st beats spreading the same money across the month. Daily and weekly finished nearly tied, $29.06 apart. Across the three windows the pattern is stable: the granular lanes cluster, the monthly lane swings widest in both directions, and no lane wins everywhere. Anyone selling one frequency as clearly superior is selling you one window.
Daily vs Weekly vs Monthly DCA at a Glance
| Factor | Daily | Weekly | Monthly |
|---|---|---|---|
| Buys over 129 months | 3,926 | 561 | 129 |
| Best suited to | Automated savers, percentage fees | Most people | Flat-fee venues |
Where Frequency Actually Bites: Fees
The backtest charges no fees, and fees are where frequency stops being a rounding difference. Two worked examples, using assumed fees and the real buy counts from the full-period test:
- A percentage fee is frequency-neutral. At 1% of each buy, every lane pays exactly $387.00 of its $38,700.
- A fixed per-buy fee punishes daily buying hard. At an assumed flat $0.50 per buy, the daily lane pays $1,963.00 (5.07% of its budget), the weekly lane $280.50 (0.72%), and the monthly lane $64.50 (0.17%). At a flat $1.00 per buy, the daily lane pays $3,926.00.
The falling window shows why this matters more than the performance gap. In 2022 the daily lane beat the monthly lane by $137.57 of end value. At a flat $0.50 per buy, the daily lane would have paid $182.50 in fees that year against the monthly lane’s $6.00: a $176.50 difference that erases the win. If any part of your venue’s fee is fixed per transaction, frequency is a cost decision first and a strategy decision second.
The Difference the Data Cannot Show: Behaviour
The backtest assumes every buy happens. Real plans miss buys, and the schedules fail differently. A daily plan run by hand is a job, not a plan: 3,926 buys means automation or quitting. A monthly buy is one visible decision, easy to postpone âjust this monthâ, which is how monthly plans quietly die in drawdowns. Weekly sits in the middle: each buy feels trivial (sizing matters more than rhythm, as our guide on how much should I invest in Bitcoin weekly works through), and skipping a week feels like breaking a streak. All of it decides which plan is still running in year three.
Run Your Own Numbers
Our test used $300 a month, Mondays, and the 1st. Your amount, weekday and start date will shuffle the small gaps above, which is itself the finding. Replay your own amount at daily, weekly or monthly frequency through our DCA calculator. The BitcoinSaving DCA calculator runs the same test across four frequencies, hourly, daily, weekly and monthly, and its iOS app, now in public TestFlight beta at bitcoinsaving.fyi/download, carries the same four options. If the ranking flips between two reasonable settings, the dial is set for your fees and temperament, not the market.
FAQ
How often should you DCA Bitcoin?
As often as your fee structure and routine support. On the same $300 a month, the three schedules finished within 2.59% of each other across 2016 to 2026. Weekly is the practical default: flat fees stay low, each buy stays small, and the habit stays alive.
Is daily DCA better than weekly?
Not on outcome. The daily lane ended the full period at $874,428.48, the weekly lane at $873,458.73. Daily won the falling year 2022 by a wider margin, but a small fixed per-buy fee would have handed that win back. Daily only makes sense with automation and percentage-based fees.
Does DCA frequency change your average cost much?
A little, and the direction depends on the market. The monthly lane’s average cost ran from the lowest of the three across the full period ($3,608.54) to the highest in falling 2022 ($26,401.96): low single-digit percentages, far less than the start date moves it.
What is the best day of the month to DCA?
There is no durable best day. The monthly lane here bought on the 1st and won two windows and lost one, which is day-choice luck across different markets. Pick a day tied to your income, such as the first buy after payday, and keep it.
Method note: all figures were computed from daily BTC/USD closing prices (Coinbase series via btcdollarcostaverage.com, data to 29 October 2026) with the script stored alongside this draft. Each lane spends exactly $300 per calendar month per window, so totals match across lanes. Buys use the close of the buy date and end values the close of the window’s final day. No fees, spreads or taxes are included except in the labelled fee examples, which use assumed fees. Past data only; nothing here is a promise about any future period.
