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description=When your card is charged, and how daily proration and graduated tiers compute your invoice;
author=Zernio Team;
keywords=zernio api,social media api,social media scheduling api,twitter api,instagram api,tiktok api,linkedin api,facebook api,youtube api,multi-platform posting,social media automation,content scheduling api;

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billing zernio api search k quickstart build a platform sdks cli mcp webhooks guides security glossary pricing billing changelog refer earn dashboard llms txt openapi overview platforms api reference resources ask ai about zernio api j billing billing when your card is charged and how daily proration and graduated tiers compute your invoice copy for ai open zernio is usage based rates live on the pricing page this page explains the mechanics behind the invoice when your card is charged how daily proration works and how the graduated tiers apply to your monthly total when your card is charged we charge your card automatically as you accrue usage the first time your accrued usage reaches a small fraud protection threshold starting at 10 your card is charged for that amount and the threshold doubles for next time established customers see fewer larger charges brand new paying customers see one quick small charge to validate the card invoicing is powered by metronome on top of stripe each invoice is itemized you see exactly which accounts phone numbers messages calls and x api operations you re paying for daily proration accounts are metered per day not per month snapshot every day our system records which accounts are connected and reports them to the billing engine one event per active account per day the per day mechanism means you only pay for the days each account was actually active for a single account in a single tier the cost works out to account_cost tier_rate days_active days_in_month so a 6 month account connected for 15 days costs 3 that month if you connect on day 1 and disconnect on day 15 you re billed for the half you used graduated tiers on the total because pricing is graduated 6 3 1 the rate isn t fixed per account it depends on your total billable units for the month computed as billable_units sum of all account days in the month days_in_month that total is then run through the graduated tier ladder first 10 units at 6 next 90 at 3 everything above at 1 with no upper cap you never get charged tier 1 prices for units that fall into tier 2 or 3 partial usage in higher tiers gets the lower rate mental model at the end of the month we add up every account day one per account per day connected divide by 30 and run the result through the rate ladder so 100 accounts 3 days costs the same as 10 accounts 30 days the graduated rates apply to the total not to individual accounts the calculator on the pricing page reflects this exact math account days divide by 30 graduated tiers minus 12 free tier credit worked example a customer has 10 accounts connected for the full month in week 2 they connect an 11th account then disconnect it in week 3 in week 4 they connect a 12th different account for the rest of the month step 1 count account days account group days active account days 10 baseline accounts 30 days each 300 1 account week 2 3 7 days 7 1 account week 4 end 7 days 7 total 314 account days step 2 convert to billable units 314 30 10 467 billable units step 3 apply graduated tiers tier units in this tier rate cost tier 1 1 10 10 6 00 60 00 tier 2 11 100 0 467 3 00 1 40 total gross 61 40 step 4 apply the free tier credit item amount total gross 61 40 free tier credit flat per month 12 00 net invoice 49 40 the total bill is not 11 accounts or 12 accounts it s the sum of all account days converted into billable units then run through the graduated rates the 11th and 12th accounts which only existed for partial weeks push the total just past the tier 1 boundary so their fractional contribution is priced at tier 2 s 3 rate not tier 1 s 6 common questions what window does zernio measure activity in calendar month account days accumulate from the 1st to the last day of each month then flush into a new period if i disconnect and reconnect the same account does it count twice each day it s active counts if it s active for 10 days disconnected for 5 then reconnected for 10 more same calendar month that s 20 account days for that account what if i connect a brand new account mid month charged from the day it s connected onward prorated through end of month which accounts pay tier 1 vs tier 2 rates the graduated rate isn t tied to individual accounts it applies to the total billable units the first 10 units of usage are at 6 units 11 100 at 3 and so on so if your monthly total works out to 12 5 billable units the first 10 are billed at 6 and the remaining 2 5 at 3 what about the free tier credit each calendar month grants 12 of credit covers the first 2 accounts at the 6 tier credit applies to the gross monthly total it s a flat per month grant not per account whatsapp rates exact per minute whatsapp calling rates by country what meta bills directly and what zernio charges changelog stay up to date with the latest api changes and improvements on this page when your card is charged daily proration graduated tiers on the total worked example common questions