Equipment rental log
Know what’s out, who has it, and what they owe.
Due Back is a check-out and return log for tool rental counters. It works out late days, late fees and the deposit refund, then prints the slip. It runs in your browser, with no account and no server.
Free to open. Works on the counter computer and the phone in your pocket.
- Item
- Tile saw
- Customer
- Dev Patel
- Check-out date
- Thu, Oct 1, 2026
- Rental days
- 3
- Due date
- Sun, Oct 4, 2026
- Daily rate
- $15.00
- Rental charge
- $45.00
- Deposit
- $100.00
- Return date
- Tue, Oct 6, 2026
- Late days
- 2
- Late fee
- $20.00
- Damage charge
- $25.00
- Deposit refund
- $55.00
Before Due Back
- Who has the pressure washer?
- Was that due back Tuesday or Thursday?
- Eight days late at five dollars a day, minus the deposit, is…
Due Back keeps the answers, so nobody has to.
How it works
Out, due, back.
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Check it out.
Pick an available tool, type the customer’s name, the deposit and the number of days. Due Back fills in the deposit from the item, shows the due date and the total to collect, and gives the rental a slip number.
Due Sun, Oct 4 · Rental charge $45.00 · Deposit $100.00 · Total to collect $145.00
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Watch the board.
The Out now screen lists everything that’s out, with overdue rentals first and the most late at the top. Filter to Overdue or Due today when it’s time to make calls.
- R-0002 Pressure washer · Ana Diaz 8 days late · $40.00
- R-0005 Concrete mixer · Eli Novak 3 days late · $60.00
- R-0003 Hedge trimmer · Ben Okafor Due today
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Take it back.
Mark it returned, note the condition and any damage. Due Back counts the late days, adds the late fee and tells you the refund, or the balance due if the charges come to more than the deposit. Print the slip again as the receipt.
Charges $45.00
Refund $55.00
The arithmetic
Six days with a tile saw.
Here is one rental from the day it goes out to the day it comes back. Scroll, and watch Due Back keep count.
| Day | Status | Running total |
|---|---|---|
| Thu, Oct 1, 2026 | Due in 3 days | Deposit held $100.00 |
| Fri, Oct 2, 2026 | Due in 2 days | Deposit held $100.00 |
| Sat, Oct 3, 2026 | Due tomorrow | Deposit held $100.00 |
| Sun, Oct 4, 2026 | Due today | Deposit held $100.00 |
| Mon, Oct 5, 2026 | 1 day late · $10.00 |
Deposit held $100.00 Late fee 1 day × $10.00 = $10.00 |
| Tue, Oct 6, 2026 | Returned |
Deposit held $100.00 Late fee 2 days × $10.00 = $20.00 Damage $25.00 |
- Deposit held $100.00
- Late fee 2 days × $10.00 = $20.00
- Damage $25.00
- Charges $45.00
- Refund $55.00
Oct 1. Dev takes the tile saw for three days. $45.00 rental charge, $100.00 deposit.
What’s in it
Built for the counter, not the back office.
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Late fees and refunds, worked out.
Late days are counted from the due date and never typed. Charges are the late fee plus any damage. If they come to more than the deposit, you see the balance due instead of a negative refund.
$25.00 damage → Refund $55.00
$120.00 damage → Balance due $40.00
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A slip that fits one page.
Print from the browser. The slip has the rates, the dates, the charges and two signature lines, and the app’s menus stay off the paper.
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Overdue first.
The board sorts overdue rentals by how late they are, then due today, then the soonest due. Counts sit on every filter.
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Inventory that knows what’s free.
Each tool is one unit with its own daily rate, late fee and default deposit. Mark a broken one Out of service and it can’t be checked out until it’s fixed.
- Tile saw Available
- Pressure washer Out
- Floor sander Out of service
- Belt sander Available
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Old slips stay right.
A rental keeps the rates it went out at. Change a price tomorrow and yesterday’s slip doesn’t move.
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History you can search.
Returned rentals, newest first. Type a customer or a tool to answer ‘did Ana bring back the leaf blower?’
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On the yard, on your phone.
Big tap targets and a bottom tab bar on phones. A dark theme that follows your system for the late shift.
The real thing
This is the app, not a mock-up.
A busy Saturday: four tools out, two of them overdue.
It opens empty. Add your first tool on the Inventory tab.
Where your records live
No account. No server. No one else’s cloud.
Due Back keeps your inventory and every rental in this browser on this computer. Nothing is sent anywhere, and there’s nothing to sign up for. Export a backup file whenever you like, and import it on a new computer. Due Back checks the file before it replaces anything.
Good to know
- One shop per browser. Two counters don’t sync.
- Clearing the browser’s data clears the log. Keep a backup.
- No card payments, tax or invoices. It records the money, it doesn’t take it.
- Returns can’t be undone in this version, so check before you confirm.
Questions from the counter.
Do I need to install anything?
No. Due Back is a web page. Open it in any current browser on the counter computer or a phone.
What if a customer brings it back late?
Pick the return date. Due Back counts the whole days past the due date and multiplies by the item’s late fee. There’s no grace period, so the slip is the same whoever is on the counter.
What if the damage costs more than the deposit?
The refund stops at $0.00 and the slip shows the balance due, so you know exactly what to collect.
Can I log a rental I forgot to enter?
Yes. The check-out date can be set in the past, never in the future.
How do I move to a new computer?
Open Backup, export the file, and import it on the new machine. The import is checked first and only replaces your log after you confirm.