Weekly vs monthly contributions: does it matter?

Want more scenarios like this? Explore the weekly hub and monthly hub, then run your own numbers in the calculator.

Consistency matters more than the schedule — but you can model both by converting weekly to monthly.

The simple answer

For long-term planning, weekly vs monthly usually makes a small difference compared to your time horizon, contribution amount, and return rate.

To model weekly investing in a monthly calculator, convert like this:

Monthly ≈ weekly × 52 ÷ 12

Example: $50/week ≈ $217/month.

Is weekly always better?

Not always. The habit is usually the main advantage. The maths difference is typically small.

What if I invest fortnightly?

Convert fortnightly to monthly by multiplying by 26 ÷ 12.

Why do calculators use monthly?

Monthly is a common planning timeframe and keeps calculations simple.

Do markets pay returns monthly?

Not exactly. This is an average modelling tool, not a precise forecast.

Where can I learn more about compounding?

See /how-compound-interest-works.html.

These pages connect to calculators so you can run your own numbers.