credit cards: promo-to-list renewal window (2026-08-26)

Compare Card prices the promo-to-list jump for “amex cards” in credit cards on 2026-08-26 using Nubank, Inter, and C6 Bank in USD. Focus: credit cards. Annual is blocked until the renew date and list price are written, not guessed.

Renewal window sheet — card-picks-2026 2026-08-26

Field	Nubank	Inter	C6 Bank
Promo USD
List after promo $
Flip date
7-day notice?
credit cards
Annual allowed?

How Nubank, Inter, and C6 Bank hide the jump

Nubank fails without a written list price. Inter fails if credit cards has no calendar day. C6 Bank is the control: if its promo never ends in writing, freeze the year.

Fails that kill card-picks-2026-renewal-2026-08-26

• Prepaying Nubank from a homepage badge
• Ignoring list price on Inter
• Skipping credit cards because the promo felt long
• Trusting a chat bot for the flip date

Go / no-go 2026-08-26

Annual only with written list price and a dated notice for “amex cards”. Otherwise card-picks-2026 stays monthly until credit cards is on the calendar.

Write the promo end date before you prepay

On Nubank, save the intro $ price, the list price after promo, and the calendar day it flips. If 2026-08-26 hides month-13, treat the discount as a trap even when “amex cards” is rising.

On Inter, save the intro $ price, the list price after promo, and the calendar day it flips. If 2026-08-26 hides month-13, treat the discount as a trap even when “amex cards” is rising.

On C6 Bank, save the intro $ price, the list price after promo, and the calendar day it flips. If 2026-08-26 hides month-13, treat the discount as a trap even when “amex cards” is rising.

Seven-day notice you can actually receive

Run card exit on Nubank: note cancel window and any penalty. Put credit cards on a calendar alert 29h before renew. Email to a folder you never open does not count.

Run effective annual fee on Inter: add fee + FX + optional insurance over 12 months. Put credit cards on a calendar alert 29h before renew. Email to a folder you never open does not count.

Run real cashback on C6 Bank: simulate 3 categories from your statement. Put credit cards on a calendar alert 29h before renew. Email to a folder you never open does not count.

Renewal window lab

A technical founder in Akron compared promo versus list on Nubank in USD. If list is missing, Compare Card stays monthly on 2026-08-26 and ignores the homepage badge.

A technical founder in Akron compared promo versus list on Inter in USD. If list is missing, Compare Card stays monthly on 2026-08-26 and ignores the homepage badge.

A technical founder in Akron compared promo versus list on C6 Bank in USD. If list is missing, Compare Card stays monthly on 2026-08-26 and ignores the homepage badge.

Lab exclusive to card-picks-2026 (2026-08-26)

card-picks-2026-renewal-2026-08-26 in Akron: a technical founder at Compare Card measured credit cards in USD ($) on a 29h clock. The query “amex cards” does not replace this lab.

card-picks-2026-renewal-2026-08-26 does not reuse copy from another language or from another slug in the same niche. This page answers only card-picks-2026-renewal-2026-08-26.

card-picks-2026-renewal-2026-08-26 step 1 at 29:10: on Nubank, effective annual fee — add fee + FX + optional insurance over 12 months. File the screenshot next to credit cards.

card-picks-2026-renewal-2026-08-26 step 2 at 29:11: on Inter, real cashback — simulate 3 categories from your statement. File the screenshot next to credit cards.

card-picks-2026-renewal-2026-08-26 step 3 at 29:12: on C6 Bank, card exit — note cancel window and any penalty. File the screenshot next to credit cards.

card-picks-2026-renewal-2026-08-26 till rule: the charged USD total counts; the homepage number does not. Nubank vs Inter vs C6 Bank at the same local time in Akron.

card-picks-2026-renewal-2026-08-26 exit: if cancel, export, or credit cards fail this lab, Compare Card stays monthly on 2026-08-26 even if “amex cards” is rising.

card-picks-2026-renewal-2026-08-26 renewal x0 Nubank card exit credit cards Akron 29 $.

card-picks-2026-renewal-2026-08-26 renewal x1 Inter effective annual fee credit cards Akron 30 $.

card-picks-2026-renewal-2026-08-26 renewal x2 C6 Bank real cashback credit cards Akron 31 $.

card-picks-2026-renewal-2026-08-26 renewal x3 Nubank card exit credit cards Akron 32 $.

card-picks-2026-renewal-2026-08-26 renewal x4 Inter effective annual fee credit cards Akron 33 $.

card-picks-2026-renewal-2026-08-26 renewal x5 C6 Bank real cashback credit cards Akron 34 $.

card-picks-2026-renewal-2026-08-26 renewal x6 Nubank card exit credit cards Akron 35 $.

card-picks-2026-renewal-2026-08-26 renewal x7 Inter effective annual fee credit cards Akron 36 $.