€40 per hour
€200 per day
€250-300 - Science paper write-up / industry news / Brief opinion, range of 1000-2000 words.
€750-1000 - Long-form feature articles, usually entailing research, several days' work, range of 3000-7000 words.
Very challenging assignments, entailing extra research, or even interviews, may cause these prices to vary upwards.
Articles that are in my domain of expertise will take less time, require less research, and therefore cost less.