Per Diem Policy Application for Travel
Per diem allowances for business travel are supposed to vary by destination — a per diem for a major city is typically higher than for a smaller town — and by the specific day of travel, since the first and last day of a trip are usually partial days with a reduced rate, and meals already provided at a conference or by a client need to be deducted from the allowance. Calculating this correctly by hand for every trip, especially multi-city trips with varying rates day to day, is tedious enough that most businesses either oversimplify with a flat rate that's wrong for some destinations, or accept that employees are roughly self-calculating their own claims with limited oversight.
STARTING PRICE
From €99
Starter tier · Single-workflow automation, one core integration, fast turnaround.
Get a quote →Saves roughly 1-2 hrs/week for a mid-sized team with regular multi-day business travel.
How the automation works
We calculate per diem allowances automatically based on the actual travel itinerary — destination-specific rates for each day of a multi-city trip, correctly reduced rates for partial travel days, and deductions for any meals already provided that the employee discloses or that show up from a corporate card feed. The employee's per diem claim is generated directly from their logged itinerary rather than self-calculated, which both saves them the arithmetic and gives finance confidence that the claim actually follows policy rather than being a reasonable-sounding estimate.
Process flow
- 01
Travel itinerary logged trigger
The trip itinerary — destinations, dates, travel days versus full days at each location — is logged through your travel booking tool or entered directly.
- 02
Look up destination rates integration
The correct per diem rate for each destination on the itinerary is retrieved from a maintained rate table, accounting for rate differences by city or region.
- 03
Calculate day-by-day allowance ai
The allowance is calculated per day, applying full rates for complete days at a destination and correctly reduced rates for partial travel days.
- 04
Apply provided-meal deductions ai
Any meals already provided — a conference breakfast, a client dinner on a corporate card — are deducted from the relevant day's allowance according to your policy's deduction schedule.
- 05
Generate the claim output
A complete, itemized per diem claim is generated directly from the itinerary and deductions, ready for the employee to confirm and submit.
Inputs
- Travel itinerary (destinations, dates)
- Per diem rate table by destination
- Partial-day and travel-day policy rules
- Provided-meal deduction data
Outputs
- Calculated per diem claims by trip
- Day-by-day allowance breakdown
- Provided-meal deduction log
- Per diem spend report by destination
Works with
Prefer a fully custom build instead of an off-the-shelf integration? We scope both options during your free consultation — most jobs like this one work fine on standard connectors, but higher-volume or non-standard systems sometimes need bespoke API work, reflected in the complex tier.
Where this goes wrong if you get it wrong
- Partial travel days — the first and last day of a trip, when the employee is in transit rather than at the destination for the full day — typically get a reduced per diem rate under most policies, and a naive calculation applying the full daily rate to every day of a trip systematically overpays on every trip's start and end date.
- Multi-city trips need the correct destination-specific rate applied to each individual day based on where the employee actually was, not a single rate for the whole trip based on the primary destination — a trip through two or three cities with different rate tiers needs genuinely day-by-day, location-specific calculation.
- Deducting for provided meals only works if the disclosure or corporate card data is actually complete — an employee who forgets to disclose a provided lunch, or a corporate card charge that doesn't clearly indicate it was a provided meal versus a personal purchase, can result in a claim that double-counts an allowance the employee wasn't entitled to, so the deduction process needs a genuine confirmation step, not silent trust in incomplete data.
- Per diem rates are typically updated periodically by whichever body sets them (a government rate table, an internal policy review), and using a stale rate table produces systematically wrong claims across every trip until the table is refreshed — the rate source needs to be actively maintained and current, not a one-time setup that's never revisited.
Frequently asked questions
How does this handle multi-city trips with different per diem rates?
The allowance is calculated day by day based on where the employee actually was on each specific day, applying that location's correct rate rather than a single average or primary-destination rate across the whole trip.
Does this account for the reduced rate on travel days?
Yes, the first and last day of a trip, when the employee is typically in transit, get the correctly reduced partial-day rate rather than the full daily allowance, which is one of the most common manual calculation errors.
How are meals already provided by a conference or client handled?
Provided meals are deducted from the relevant day's allowance according to your policy's deduction schedule, based on employee disclosure or available corporate card data, so the claim doesn't double-pay for a meal that was already covered.
How current are the per diem rates used in the calculation?
Rates are pulled from an actively maintained rate table rather than a static one-time setup, so a periodic rate update takes effect across new claims without requiring manual reconfiguration.