Biller name
Alliant Energy
HQ: Madison, WI
Legal name
Alliant Energy Corp.
Website
Deferit is unaffiliated with Alliant Energy
Pay your Alliant Energy bill with Deferit
Earn 2% cashback on every bill you pay with Deferit.
Financing Option
Deferit can pay your bill now, then you pay it back later.
How to pay Payment methods Support FAQ Split into installments
Alliant Energy Account & Billing Support
| Department | Number / Channel |
|---|---|
| Customer service Main | 800-ALLIANT (800-255-4268) |
Retrieved Jun 2026 · Source: alliantenergy.com · current departmental phone numbers and hours of operation.
Alliant Energy Bill Types
About Alliant Energy
Alliant Energy Corp. is a regulated electric and natural gas utility holding company serving approximately 975,000 electric and 430,000 natural gas customers primarily in Iowa and Wisconsin. Its operating subsidiaries are Interstate Power and Light Company (IPL) in Iowa and Wisconsin Power and Light Company (WPL) in Wisconsin.
How to Pay Your Alliant Energy Bill
- Phone: 1-800-ALLIANT (800-255-4268)
- Online: alliantenergy.com
- With Deferit: Pay with Deferit and split the bill into 4 installments, once every two weeks. Deferit pays Alliant Energy in full immediately. Learn more →
Payment Methods & Addresses
Retrieved Jun 2026 · Source: alliantenergy.com.
Need to split your Alliant Energy bill into installments?
Retrieved Jun 2026 · Source: alliantenergy.com.
| Alliant Energy payment arrangement |  Deferit | |
|---|---|---|
| How to access | Check Alliant Energy's online account, payment portal, or customer support team for available payment arrangement options. | Sign up, take a picture of your bill, and Deferit pays it on your behalf. Online or in app. |
| Maximum split | If Alliant Energy offers payment arrangements, limits are set by Alliant Energy based on your account status. We couldn't verify a published maximum split. | 4 installments, once every two weeks, up to your Deferit balance |
| Eligibility & approval | Decided by Alliant Energy at request time based on account status | Monthly Deferit membership, no lock-ins. Cancel anytime. |
| Fees & interest | Fees and interest were not published in the sources reviewed. Check Alliant Energy's payment portal or support team before setting up an arrangement. | Monthly Deferit membership plus a $0.99 processing fee per bill. No interest. No late fees on eligible Deferit memberships.* |
| If you miss a payment | Missed-payment consequences are set by Alliant Energy and may include late fees, service interruption, or collection activity depending on your account. | You can reschedule a repayment date in the app before it's due. Late fees may apply depending on your Deferit membership.* |
| Works for | Alliant Energy bills only | Alliant Energy and most other US household bills |
| Learn more → |
*No late fees feature included with Max and Ultra memberships. Installments on the Lite membership may incur late fees if overdue. See Membership terms for details.
Pay your Alliant Energy bill with Deferit
Earn 2% cashback on every bill, redeemed off your next payment. No subscription fee.
Common Questions About Alliant Energy
Can I use Deferit to pay my Alliant Energy bill? ›
Yes. Enter your Alliant Energy bill amount in Deferit and we pay Alliant Energy in full straight away. You repay us in 4 fortnightly instalments, completely free.
What payment methods does Alliant Energy accept? ›
Alliant Energy typically accepts online payments via credit card, debit card, or bank transfer. Visit alliantenergy.com or contact their support team for the most up-to-date options.
Does Alliant Energy offer autopay? ›
Most billers offer automatic payment to help avoid late fees. Visit Alliant Energy's website or app to check whether autopay is available and how to enrol.
What do I do if I can't pay my Alliant Energy bill on time? ›
Contact Alliant Energy directly at 1-800-ALLIANT (800-255-4268) to ask about payment arrangements or hardship assistance programs. Deferit can also help — split your bill into 4 payments to ease the immediate financial pressure.
Customer Service Tips for Alliant Energy Customers
Pay without an account using One-Time Payment. Alliant Energy lets you pay online without creating an account or password. Just visit the One-Time Payment page and enter your account number to pay by credit card, debit card, or bank account with no fees.
Set up Budget Billing for predictable monthly payments. Budget Billing averages your energy costs over 12 months so you pay the same amount each month. Sign in to My Account, click the Billing tab, and select Budget Billing to enroll.
Request a payment arrangement if you can't pay in full. If you can't cover your full balance by the due date, Alliant Energy offers payment arrangements and extensions. Check eligibility in My Account under the Billing tab by selecting Need Help to Pay.
Pay by phone or text without logging in. Call 1-800-ALLIANT (800-255-4268) and say pay my bill to use the automated phone system, or text PAY to 255255 from your mobile device. Both options are available around the clock.
Retrieved Jun 2026 · Sources: alliantenergy.com/account-and-billing/payment-options/online-one-time-payment ·alliantenergy.com/account-and-billing/payment-options/budget-billing ·alliantenergy.com/account-and-billing/payment-assistance/arrangements-and-extensions ·alliantenergy.com/account-and-billing/payment-options/pay-by-phone.
Updated: Jun 2026