Work out an estimate of your parental benefit (foreldrepenger) in Norway, and compare the monthly payout at 100 % coverage (49 weeks) and 80 % coverage (59 weeks).
When applying for parental benefit, parents in Norway choose between a shorter period with full salary compensation (100 % coverage for 49 weeks), or a longer period with reduced compensation (80 % coverage for 59 weeks). The amount is split between the mother and father/co-parent according to the quota rules and the agreement between them.
Fetching the current base amount from NAV …
At 100 % coverage you get full salary compensation (up to 6G), but the period is shorter — 49 weeks. At 80 % coverage you get a slightly lower share of your income, but the period is extended to 59 weeks.
Yes, the general rule is that you must have been in paid work for at least 6 of the last 10 months before your parental benefit period starts, with an income of at least half the base amount.
Parental benefit is only calculated on income up to 6 times the base amount (6G). Income above this cap doesn't give higher parental benefit, unless your employer covers the difference as a voluntary arrangement.