This document discusses Xcel Energy's strategy to achieve financial success through environmental leadership and reducing carbon emissions. It outlines plans to increase renewable energy and energy efficiency, upgrade plants, and replace coal generation with natural gas and renewable sources. This is projected to reduce carbon emissions by 2020 while maintaining reasonable customer rates and regulatory approval of resource plans. The strategy also aims to deliver annual EPS growth of 5-7% through rate cases and recovery of capital investments in transmission and generation projects.

1. Financial Success Through
Environmental Leadership
Fixed Income Investor Meetings
February 2008

2. Safe Harbor
This material includes forward-looking statements that are subject to
certain risks, uncertainties and assumptions. Such forward-looking
statements include projected earnings, cash flows, capital
expenditures and other statements and are identified in this document
by the words “anticipate,” “estimate,” “expect,” “projected,”
“objective,” “outlook,” “possible,” “potential” and similar
expressions. Actual results may vary materially. Factors that could
cause actual results to differ materially include, but are not limited to:
general economic conditions, including the availability of credit,
actions of rating agencies and their impact on capital expenditures;
business conditions in the energy industry; competitive factors;
unusual weather; effects of geopolitical events, including war and acts
of terrorism; changes in federal or state legislation; regulation; actions
of accounting regulatory bodies; and other risk factors listed from
time to time by Xcel Energy in reports filed with the SEC, including
Exhibit 99.01 to Xcel Energy’s report on Form 10-K for year 2006.

3. Company Profile
Traditional Regulation
NSP-Minnesota NSP-Wisconsin
Operate in 8 States
47% of net income* 7% of net income*
Combination Utility
Electric 85% of net income
Gas 15% of net income
PSCo
38% of net income* Customers
3.3 million electric
1.8 million gas
SPS 2007 Financial Statistics
8% of net income* NI Ongoing: $612 million
NI GAAP: $577 million
* Percentages based on 2006 Net Income
Assets: $23 billion
Equity ratio: 43%
2007 EPS Ongoing: $1.43, GAAP: $1.35
2007 Dividend $0.92 per share annualized

4. Xcel Energy Corporate Strategy
Grow our core business and
meet the environmental challenge
Achieve annual EPS growth of 5 – 7%
Increase dividend by 2 – 4% annually
Reduce emissions by 2020

5. Carbon Strategy
Reduce carbon emissions associated with electric
service by 2020
Implement strategy by operating company
Maintain reasonable rates
Ensure appropriate regulatory treatment

6. Actions to Reduce Carbon
Increase renewable energy
Uprate and extend lives of nuclear plants
Expand demand-side management,
energy efficiency and conservation efforts
Upgrade environmental systems and improve
generation plant efficiency
Replace/repower inefficient generation
Evaluate clean coal carbon capture and storage
Scope and develop Smart Grid concept

7. Minnesota Resource Plan
Reduces carbon emission by 22% by 2020
Adds 2,600 megawatts of wind by 2020
Seeks to expand output from Prairie Island and
Monticello nuclear plants by 230 MW
Requests environmental upgrades and capacity
expansion of 80 MW at Sherco
Seeks approval of Manitoba Hydro 375 MW PPA
Would add 2,300 MW of natural gas generation
Expands DSM efforts
Plan requires Commission approval

8. Colorado Resource Plan
Reduces carbon emission by 10% by 2017 and puts
PSCo on path to achieve 20% reduction by 2020
Adds 800 MW of wind by 2015
Replaces four coal units with natural gas generation
Acquire 25 MW of solar with plans to add up to 200
MW of solar as technology develops
Expands DSM efforts
Plan requires Commission approval

9. Changing Supply Mix
2006 Estimated 2020
Energy Supply Mix * Energy Supply Mix *
Nuclear
Nuclear
Gas
13%
12%
27% Renewables
Renewables 24%
Gas
9% 17%
Coal **
Coal ** 46%
52%
* Includes purchases
** Low-sulfur western coal

10. Success Factors
Key components of past growth
— Constructive rate case outcomes
— MERP
— Comanche 3
Key components of future growth
— Transmission riders (MN, CO, ND, SD)
— Favorable wind recovery (MN, CO)
— Environmental rider (MN)
— Planned forward test year (CO)
— Nuclear recovery mechanism (MN)
— Southwestern Public Service (SPS)

11. Capital Expenditure Forecast
Denotes enhanced recovery mechanism
Dollars in millions
2008 2009 2010 2011
Base & Other $1,245 $1,285 $1,310 $1,300
MERP 170 25 10 0
Comanche 3 330 60 10 0
MN Wind Tran/CapX 2020 40 65 115 270
Sherco Upgrade 5 20 75 230
MN Wind Generation 135 0 0 0
Nuclear Capacity/Life Ext 75 120 180 200
Fort St. Vrain CT 100 25 0 0
Total Committed $2,100 $1,600 $1,700 $2,000
Potential Projects 0-100 200-400 200-400 200-500
Range $2,100- $1,800- $1,900- $2,200-
$2,200 $2,000 $2,100 $2,500

12. Recovery on Capital Investment *
Dollars in millions
2,800
$2,350
2,400
$2,150
$2,000
$1,900
2,000
1,600
1,200
800
400
0
2008 2009 2010 2011
Traditional Recovery Enhanced Recovery Depreciation
* Capital forecast based on middle of range

13. Potential Cash from Operations
Dollars in millions
2,400
2,000
1,600
1,200
800
400
0
2008 2009 2010 2011
Net Income * Depreciation NOL
* Net Income growth based on middle of range

14. Delivering on Rate Base Growth *
Dollars in billions
CAGR = 7.5%
$16.9
$15.7
$14.9
$14.0
$12.8
$11.7
2006 2007 2008 2009 2010 2011
* Growth based on middle of capital forecast range

15. Earnings Guidance Range
Dollars per share
2007A 2008
Regulated Utility $1.55 $1.61 – $1.71
Holding Company $(0.12) $(0.16)
Ongoing Earnings $1.43 $1.45 – $1.55
PSRI/COLI $(0.08) –
Continuing Operations $1.35 $1.45 - $1.55
Disc Ops – –
GAAP Earnings $1.35 $1.45 – $1.55

16. Delivering on 5-7% EPS Growth
Ongoing EPS excludes the impacts of COLI and disc ops.
A reconciliation to GAAP earnings is included in the appendix.
Guidance Range
$1.45 - $1.55
$1.43
$1.30
$1.15
~ 5%*
10%
13%
2005 2006 2007 2008
Ongoing Ongoing Ongoing Guidance
* Estimated growth rate based on middle of guidance range

17. Debt Maturities
Dollars in millions
$1,200
SPS
$1,000 PSCo
NSPW
$800
NSPM
$600 Xcel Energy
$400
$200
$0
2008 2009 2010 2011 2012 2013 2014 2015

18. 2008 Financing Plans
Issued $400 million of retail hybrid securities with a
7.6% coupon in January 2008
Plan to issue $400-$500 million of first mortgage
bonds at NSP-Minnesota in the first quarter
Plan to issue up to $250 million of first mortgage
bonds at NSP-Wisconsin in the third quarter
Plan to issue $500-$600 million of first mortgage
bonds at PSCo in the third quarter
All financing plans are subject to change, depending
on capital expenditures, internal cash generation,
market conditions and other factors

19. Senior Debt Ratings
Secured Unsecured
Fitch Moody’s S&P Fitch Moody’s S&P
Holding Co. BBB+ Baa1 BBB
NSPM A+ A2 A A A3 BBB
NSPW A+ A2 A A A3 BBB+
PSCo A A3 A A- Baa1 BBB
SPS BBB+ Baa1 BBB+

20. Attractive Value Proposition
Low risk, fully regulated and integrated utility
Constructive regulatory environment with enhanced
recovery of major capital projects
Pipeline of investment opportunities
Environmental leader, well-positioned
for changing rules
Attractive Total Return
Sustainable annual EPS growth of 5% – 7%
with upside potential
Strong dividend yield of ~ 4.5%
Sustainable annual dividend growth of 2% – 4%

21. Appendix

22. Capital Investment Opportunities *
Dollars in millions
$2,800
Potential Projects
$2,400
Common/Other
$2,000
Nuclear Fuel
$1,600
Gas
$1,200
Elec Distribution
$800
Elec Transmission
$400
Elec Generation
$0
2008 2009 2010 2011
* Capital forecast based on middle of range

23. Capital Expenditures
by Operating Company *
Dollars in millions
2008 2009 2010 2011
NSPM $935 $955 $1,060 $1,380
PSCo 945 650 680 750
SPS 170 205 180 140
NSPW 100 90 80 80
Total $2,150 $1,900 $2,000 $2,350
* Capital forecast based on middle of range

24. Capital Expenditures by Function *
Dollars in millions
2008 2009 2010 2011
Elec Generation $935 $480 $525 $745
Elec Transmission 300 325 390 500
Elec Distribution 355 345 355 360
Gas 140 155 160 155
Nuclear Fuel 145 150 140 105
Common/Other 225 145 130 135
Potential Projects 50 300 300 350
Total $2,150 $1,900 $2,000 $2,350
* Capital forecast based on middle of range

25. Reconciliation - Ongoing EPS to GAAP
Dollars per share
2007
2005 2006
Ongoing Earnings $1.15 $1.30 $1.43
PSRI/COLI $0.05 $0.05 $(0.08)
Continuing Operations $1.20 $1.35 $1.35
Disc Ops $0.03 $0.01 –
GAAP Earnings $1.23 $1.36 $1.35
As a result of the termination of the COLI program, Xcel Energy’s management
believes that ongoing earnings provide a more meaningful comparison of earnings
results between different periods in which the COLI program was in place and is
more representative of Xcel Energy’s fundamental core earnings power. Xcel
Energy’s management uses ongoing earnings internally for financial planning and
analysis, for reporting of results to the Board of Directors, in determining whether
performance targets are met for performance-based compensation, and when
communicating its earnings outlook to analysts and investors.

26. 2006 Rate Case Outcomes
Dollars in millions
Return on Equity
Dollar Increase
Requested Granted Requested Granted
Colorado Electric $208 $151 11.0% 10.5%
Minnesota Electric $156 $131/115* 11.0% 10.54%
Wisconsin Electric $53.1 $43.4 11.9% 11.0%
Colorado Gas $34.5 $22.0 11.0% 10.5%
Wisconsin Gas $7.8 $3.9 11.9% 11.0%
* $131 million for 2006 reduced to $115 million in 2007
for large customer coming on-line January 1, 2007

27. 2007 Rate Case Outcomes
Dollars in millions
Dollar Increase Return on Equity
Requested Granted Requested Granted
Texas Electric $48.0 $23.0 11.6% N/A
Colorado Gas $41.9 $32.3 11.0% 10.25%
Minnesota Gas $18.5 $11.9 11.0% 9.71%
North Dakota Gas $2.8 $2.3 11.3% 10.75%
Wisconsin Electric $67.4 $39.4 11.0% 10.75%
Wisconsin Gas $5.3 $5.3 11.0% 10.75%

28. Pending Rate Cases
Dollars in millions
Revenue Requested Interim
Jurisdiction Request ROE Rate Decision
New Mexico Electric $17.3 11.0% N/A Summer 2008
No. Dakota Electric $20.5 11.5% 2/2008 Summer 2008

29. 2006 Rate Base and ROE
Dollars in millions Weather Normalized
Rate Base Earned ROE
Minnesota Electric $3,599 10.3%
Minnesota Gas 441 6.1
North Dakota Electric 188 8.9
North Dakota Gas 44 7.5
South Dakota Electric 232 11.1
Colorado Electric 3,292 7.7
Colorado Gas 1,106 7.8
Wisconsin Electric 556 10.8
Wisconsin Gas 77 7.4
Texas Electric 977 6.5
New Mexico Electric 311 6.2
Wholesale 879 Not Reported
Total Rate Base $11,702