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KERB

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KERB
84 days · one logbook · five FBT years

Your company car’s logbook, kept on your phone.

Log trips in a tap or two, keep the 12-week logbook the ATO asks for, and see the fringe benefits tax (FBT) your employer is likely to pay.

Log trips quicklySaved routes, return trips and one-tap private trips.
Know where you standAn FBT estimate in plain words, and what changes it.
Stays on this phoneNo account and no cloud. Back up to a file from Settings.
On an iPhone, add Kerb to your home screen before you start. Safari and the home-screen app keep separate data.

Estimates only — not tax advice.
Step 1 of 2

Your car

A few details so Kerb can work out the FBT. About a minute. Your fleet manager can tell you anything you don’t know.

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$
{{ hints.baseValue }} Don’t know it? Ask your fleet manager.{{ cf.e.baseValue }}
{{ hints.acquired }}{{ cf.e.acquired }}
Type of vehicle
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Owned or leased by your employer?
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GST credit claimed{{ hints.gstCredit }}

Estimates only — not tax advice. Everything stays on this phone.
Step 2 of 2 · optional

Home and work

Kerb turns these into one-tap routes on the Home screen. Travel between home and work is usually private.

{{ su.e.work }}
km
Type it from a map, or measure it later by driving once (Settings → Places & routes).{{ su.e.km }}
You only have to log business trips with odometer readings. Kilometres you don’t log count as private.
KERB
Fleet vehicle · {{ fleetCarName }}
Sample data · made-up figures
You’re looking at FBT year {{ yearLabel }}{{ pastSub }}
{{ bn.title }}{{ bn.sub }}

Home

Odometer · km

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{{ bn.title }}{{ bn.sub }}

Quick log

{{ q.label }}{{ q.km }}
{{ q.typeLabel }}
Pin up to four routes — like Home → Work — and log them here with one tap.

12-week logbook

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{{ lb.title }}

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Recent trips

No trips in {{ yearLabel }} yetTap + to log your first one. Business trips need the odometer at the start and the end.

Trips

{{ trips.sub }}

Business{{ trips.biz }}
Private{{ trips.prv }}
Logged{{ trips.tot }}

{{ trips.lbLine }}

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{{ g.kmFmt }}
{{ t.day }}{{ t.mon }}Nothing logged{{ t.when }} · inside your logbook period
No trips in {{ yearLabel }}Business trips need a purpose and the odometer at the start and end. Private trips can be just a distance — or not logged at all.
No trips matchTry another word, or show every trip again.

Costs

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Costs paid in {{ yearLabel }} {{ costs.total }}

{{ costs.driverLine }}

{{ costs.leaseIgnored }}
{{ costs.leaseNote }}
Your employer usually records the car’s running costs. Add any you paid yourself and weren’t reimbursed for — they count as your contribution and lower the FBT.

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{{ c.total }}

Nothing entered yet

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{{ costs.deemedTitle }}

{{ costs.deemedSub }}

{{ r.label }}
{{ r.hint }}{{ r.value }}
Total running costs · {{ yearLabel }} {{ costs.opTotal }}

{{ costs.opNote }}

Report

{{ rep.sub }}

Estimated FBT · {{ yearLabel }} {{ rep.fbt }}

{{ rep.whoPays }}

Amount on your income statement{{ rep.rfba }}

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{{ n.title }} {{ n.text }}

Two ways to work it out

{{ mm.name }} {{ mm.fbt }} {{ mm.sub }} Lower FBT

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How this is worked out

Statutory formula
{{ r.label }}{{ r.value }}
Operating cost (logbook)
{{ r.label }}{{ r.value }}

{{ rep.opReason }}

FBT is 47% of the grossed-up value. {{ rep.grossNote }}

This year’s details

of {{ daysHeld }} days held
{{ daysError }} {{ hints.daysUnavailable }}
$
{{ contribError }} {{ hints.contrib }} {{ rep.driverPaidLine }}

What moves this number

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Send

“Send” shares the spreadsheet with your phone’s mail or messaging apps; it imports straight into Kerb. It includes your logbook period, odometer readings, costs and trips. PDF opens a printable logbook.

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{{ pageTitle }}

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Tax and reminders

Data

Help
{{ r.label }}{{ r.value }}

Drivers can edit their own car. The cost price, date first held and type decide the FBT — check them with your fleet manager.

Your other vehicles

Places are names, not addresses — Kerb never looks anything up and never sends where you live.

Places

No places yet. Add Home and Work first.

Routes

A route is two places and the distance between them. Pinned routes appear in Quick log on Home.

Up to four routes can be pinned to Quick log. Changing a route’s distance never changes trips already logged.
Logbook now{{ lb.pill }}
{{ lb.title }}

{{ lb.sub }}

{{ r.label }}{{ r.value }}

The rules in short

Record every business trip for 12 weeks in a row (84 days), with the odometer at the start and end of each trip, plus an odometer reading when the 12 weeks start and when they end. Kilometres you don’t log count as private.

{{ hints.logbookValid }} Start a new logbook if your job or driving pattern changes.

Logbooks

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No logbooks yet.

Odometer readings

No readings yet. Record one on 31 March each year and when a logbook starts and ends.

Only the logbook (operating-cost) method uses the ATO benchmark interest rate, to work out the interest the tax rules add for an owned car. The ATO publishes a new rate each FBT year.

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%
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Source: {{ bmSource }}. Changes save when you leave the field.
Show reminders in KerbBanners on Home for the 31 March odometer reading, your logbook’s start and end, and days with nothing logged.

Add to my calendar

Kerb can’t send notifications. Save a calendar file instead and your phone will remind you: the year-end odometer reading on 31 March{{ remLbNote }}.

Back up

Everything is stored on this phone only. A backup file holds every vehicle, trip, reading, cost, place and setting. {{ lastBackup }}

Restore

Replaces what’s on this phone with a backup (Kerb v3 or v2). A restore point of your current data is kept first.

Restore points

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Kerb keeps the last three restore points — made before an import, a restore, loading sample data or clearing everything.

Sample data

Made-up vehicles and trips to look around with. Replaces what’s here; a restore point is kept.

Clear all data

Deletes every vehicle, trip, reading and cost on this phone. Back up first — a restore point is kept, but it lives on this phone too.
I manage a fleetAdds a fleet view: import drivers’ spreadsheets, see every car’s FBT and the totals for the return.

Imported cars are kept apart from your own car. Each import keeps a restore point, and never changes a car’s cost price, type or other FBT years without showing you first.

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KERB

A car logbook and FBT estimator for company-car drivers and their fleet manager.

{{ hints.disclaimer }} Kerb works out an estimate from what you enter, using the FBT rate of 47% and the ATO’s published rates. Your employer decides how the car is reported, and its tax adviser should check the figures before the FBT return is lodged.

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Your data stays in this browser on this device. Nothing is sent anywhere unless you send a file yourself.

Kerb v3 · data format 3 · build 7d991a0 · 2026-11-12

Fleet

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FBT payable · {{ yearLabel }} {{ fleet.totalFmt }}

{{ fleet.totalSub }}

{{ st.label }}{{ st.value }}

Needs attention

Nothing needs attentionEvery taxable car has a complete logbook or uses the statutory formula on purpose.

Good to know

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No vehicles yetImport drivers’ spreadsheets, or add a vehicle by hand.

Vehicles

{{ fleet.vehSub }}

{{ v.make }}{{ v.rego }} · {{ v.driver }}
{{ v.status }}
FBT{{ v.fbtFmt }}
Method{{ v.method }}
No vehicles yetImport drivers’ files or add one by hand.

Import

Collect drivers’ files at year end

  1. Each driver opens Report and taps Send to fleet manager.
  2. Save the spreadsheets they send you, then choose them all here at once.
  3. Check what will change for each file, then confirm. A restore point is kept first.

Recent imports

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Nothing imported yet.

Return

FBT return figures for {{ yearLabel }}

FBT payable{{ frep.totalFmt }}

{{ frep.sub }}

Cars by method

{{ m.name }}
{{ r.label }}{{ r.value }}

By vehicle

{{ r.make }}{{ r.sub }}{{ r.fbtFmt }}{{ r.taxFmt }}

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