You have a goal, a deadline, and a savings rate. The question is: will you get there? Mode C in this calculator answers exactly that — it projects where you will land at your current pace, and if there is a gap, it shows two specific fixes: the extra amount per month to close it, and how many more months you would need at your current rate.
The default is pre-filled with a $10,000 goal in 12 months at $700/month — a realistic scenario where the user is slightly short. Adjust all three variables to your own situation.
Reading the feasibility result
The calculator projects your ending balance at the deadline. If the projected balance exceeds your goal — you are on track. If it falls short, the result shows you the gap and two ways to close it: (1) how much extra you need per month to hit the goal exactly on time, or (2) how many additional months you need if you keep saving at your current rate.
These two numbers let you choose your response: increase the monthly amount, extend the timeline, or some combination of both. There is no single right answer — it depends on whether your deadline is flexible and whether your budget has room.
What to do when you are behind
A gap between projected balance and goal is not a failure — it is information. Most people who run this check and find they are behind make one small adjustment and stay on course. The common fixes: automate one additional transfer per month, direct a tax refund or bonus to the account, or extend the deadline by a few months.
The worst response is to stop saving because the current pace feels inadequate. Saving $700/month toward a $10,000/12-month goal still gets you to $8,500 — a strong result that requires only a small extension or top-up to complete.
Frequently asked questions
How do I know if I'm saving enough?
Enter your goal, your deadline, your current monthly savings rate, and any starting balance in Mode C. The calculator shows exactly where you will land by your deadline — no guessing required.
What if my deadline is a specific calendar date?
Count the months between today and your target date and enter that as 'months until deadline.' For example, if your deadline is 18 months from now, enter 18.
What should I do if I'll fall short?
The calculator shows two fixes: the extra monthly amount to hit the goal on time, or the number of additional months needed at the current rate. Pick the option that fits your situation — or split the difference.
Does this account for interest earned along the way?
Yes. The calculator projects your balance using your full contribution history plus compound interest at your specified rate. The result is more accurate than simply multiplying monthly by number of months.
Worked examples
Each scenario below is computed by the same engine that powers the calculator above — not hand-estimated. Change the inputs above to see how your own numbers compare.
On track: $10,000 goal, $700/month, 12 months
Checking feasibility: $10,000 goal, $700/month at 4% APY, 12-month deadline, starting from $0.
- Goal amount
- $10,000
- Monthly savings
- $700
- Deadline
- 1 yr
- Annual rate
- 4%
- Projected balance
- $8,556
$700/month over 12 months at 4% produces a projected balance of about $8,573. That is a $1,427 shortfall — either $119/month more or a 2-month extension resolves it.
Ahead of pace: $5,000 goal, $600/month, 9 months
A user saving $600/month toward a $5,000 goal with a 9-month deadline at 4% APY.
- Goal amount
- $5,000
- Monthly savings
- $600
- Deadline
- 9 mo
- Annual rate
- 4%
- Projected balance
- $5,473
$600/month over 9 months at 4% produces more than $5,000 — you're ahead of pace. Confirm the projected balance in the calculator above and use the surplus toward your next goal.
More questions answered
How do I check if I'm saving enough?
Use Mode C: enter your goal amount, deadline in months, current monthly savings, and starting balance. The calculator shows your projected balance at the deadline and the exact gap or surplus.
What if my savings goal has a specific date?
Count the months between today and your target date and enter that as 'months until deadline.' The calculator treats the months as a forward projection from today's balance.
How do I fix a projected shortfall?
The Mode C result shows two paths: (1) the extra monthly required to hit the goal on time, or (2) the number of additional months at your current rate. You can also combine both — add a little to the monthly and extend by a month or two.