Check the Tax Reserve Gap Payment by Payment — Free
One reserve percentage applied inconsistently leaves silent gaps. Check each payment against the share you decided to set aside, and see the total still missing.
The proof surface
Quarter ledgers count filing dates. This tracks money: the gap between your chosen reserve share of each payment and what you actually moved aside, summed into one honest shortfall.
Why the flat version breaks
Netting surpluses against gaps automatically
A surplus you chose to keep is not free cover for a later gap.
Reserving on profit guesses
The ledger works on payments received, which you can verify.
Treating the percentage as tax advice
Your real liability depends on your full tax situation.
How to work the reserve envelope
The sample 25 percent is illustrative. Your reserve share depends on your tax situation; this tool applies the number you enter and nothing more.
Enter the amount actually transferred to your reserve, not the amount you intended. The March payment kept 70 of a required 100, leaving a 30-unit gap.
The shortfall never goes below zero per payment — the retainer sample kept 350 against 300 required, and its surplus is not netted against other gaps in the total. Decide deliberately whether to keep buffers.
Move the total shortfall before the next payment lands. If gaps repeat, adjust the percentage or the habit, not just the transfer; the tool never sees your bank and cannot verify balances.
What the reserve envelope replaces
| Question | Before | Visible working |
|---|---|---|
| Netting surpluses against gaps automatically | A surplus you chose to keep is not free cover for a later gap. | Record what was really moved |
| Reserving on profit guesses | The ledger works on payments received, which you can verify. | Let over-reserves sit where they are |
| Treating the percentage as tax advice | Your real liability depends on your full tax situation. | Close gaps while the money is traceable |
A local arithmetic aid replaces hand calculation, not expert review. No paid AI service is needed.
Run it on the samples, right here
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Bookkeeping arithmetic on amounts you enter, in any currency as long as rows share it. Not tax advice; agree your reserve rate and obligations with a qualified accountant.
Data note: Everything runs in this browser tab on the reserve envelope: your payment received | gross amount | amount already set aside stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Go deeper: the companion app files the same reading as a punched ticket stubs
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the reserve envelope reading, and holds your drafts on this device — one free run, then $ 4 one-time for the layer that keeps filing.
The reserve envelope reading is complete for free. The optional $4 layer adds print, row CSV and the last five local reading summaries; it does not add hidden answers. Checkout is not configured yet; the article demo remains unlimited.
Open the check the tax reserve gap payment by payment companionBoundary
Bookkeeping arithmetic on amounts you enter, in any currency as long as rows share it. Not tax advice; agree your reserve rate and obligations with a qualified accountant.
What this is built on
- Method: The shortfall never goes below zero per payment — the retainer sample kept 350 against 300 required, and its surplus is not netted against other gaps in the total. Decide deliberately whether to keep buffers.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-28, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Before: A surplus you chose to keep is not free cover for a later gap. After: the reserve envelope shows the working beside each named row so the reader can change the assumption and inspect the consequence.
Optional AI formatting, not calculation
For this reserve envelope, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a reserve envelope. Return plain rows only: payment received | gross amount | amount already set aside. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: payment received | gross amount | amount already set aside. No AI response is executed as code.