Split your savings between short-term cash and long-term investing.

Most households benefit from splitting savings into short-term (liquid, low return, safe) and long-term (invested, higher expected return, variable). The split depends on time horizons — emergency funds and near-term goals need liquidity, retirement and 10+ year goals benefit from investment growth. Getting the allocation right is more important than optimising within each bucket.

Typical split guidanceshort-term bucket covers emergency fund + goals within 3 years. Held in cash savings at 3-5%. Long-term bucket covers retirement and 5+ year goals. Invested at expected 5-7% real return. The ratio varies by life stage: younger households can tilt more toward long-term (longer horizon); older households or those approaching specific goals need more short-term.

The calculator shows projected balances in each bucket at 5 and 10 years. The difference makes visible what's at stake in allocation decisions. 500/month split 30% short-term / 70% long-term vs 70% short-term / 30% long-term produces notably different outcomes after a decade — the long-term bucket compounds more aggressively.

How to use it

Enter total monthly savings and the percentage allocated to short-term cash vs long-term investment. Enter expected rates for each (cash 3-5%, investment 5-7%). The tool shows 5-year and 10-year balances in each bucket.

What the result means

Total projected balance is the sum of both buckets at each horizon. Long-term bucket grows faster due to higher expected return — but also carries more risk. Short-term bucket is more predictable but grows slower. The split reflects your risk tolerance and goal timing.

Planning tool, not financial advice.

Run it with sensible defaults

Using total monthly savings of 500, short-term allocation of 40%, short-term rate of 4%, long-term rate of 7%, the calculation works out to 81,375.40. Nudge the inputs toward your own situation and the output recalculates instantly. The defaults are meant as a starting point, not a recommendation.

The levers in this calculation

The inputs — Total Monthly Savings, Short-Term Allocation, Short-Term Rate, and Long-Term Rate — do not pull with equal force. Two inputs usually tip the answer one way or the other. Identify which ones matter most by flipping each value past a round threshold and watching whether the winning option changes.

How the math works

Splits monthly savings by allocation percentage. Each bucket grows at its rate with monthly compounding. Shows 5 and 10 year projections. The working is transparent — you can verify every step yourself in the formula section below. No black box, no opaque "proprietary model".

How to use this beyond the first run

Re-run the calculation once a year. Life changes — pay rises, new expenses, interest-rate shifts — and the figure that looked right 12 months ago often isn't today. Annual recalibration keeps the plan honest.

What this doesn't capture

The calculation assumes a steady savings rate and a stable interest rate. Real saving journeys include emergencies, windfalls, and rate changes — especially in easy-access products. The figure is a direction of travel, not a guarantee.