Start with your known and uncertain dates
Write down the dates that are certain and the part of the stay that might change. For the same car, compare daily rate × 7 with daily rate × the actual longer day count. A calendar month and thirty days need not match. The fixed daily tariff stays the basis of the calculation; no weekly or monthly discount is added automatically.
Compare mileage on the same itinerary
Estimate the journeys across the complete stay, then ask for the allowance and extra-kilometre calculation attached to each proposal. A longer rental need not inherit an assumed daily accumulation. If you expect a mix of city days and longer trips, explain it; a lower-looking headline can be a poor comparison when the included distance differs.
Ask about changes before they are needed
Discuss extension, early return and a possible change of vehicle before accepting the proposal. Ask what notice is needed, how the revised period is calculated and whether the rate changes. Keep the accepted rules with the quote so you can review a later change against the same agreement rather than relying on an open date picker.
Include the practical continuity questions
For a longer period, ask whom to contact for operating questions and how any agreed vehicle checks or service arrangements would be handled. Do not infer a replacement-car entitlement or maintenance package. If another driver may join, or you may change accommodation, identify those requirements now rather than treating the first week’s brief as complete for the whole stay.
Compare the base amount and other commitments
Keep the rental amount, deposit and usage items separate, and check the payment schedule. Request exact weekly and monthly alternatives, their validity and the conditions you would accept. Confirm the selected proposal before making payment arrangements outside the website. The enquiry begins the discussion; the final period, vehicle and obligations need to be agreed for your rental.
Questions and answers
Is monthly rental always cheaper?
The same fixed daily tariff applies to the base calculation, with no automatic monthly discount. A longer stay has more rental days. Compare deposit, mileage and other applicable terms alongside the base amounts.
Can I extend just by selecting more dates online?
No. The calendar collects a request and does not amend an existing agreement. Contact the rental team and obtain the applicable extension arrangement.