G    Em   C  Cadd9  G/B  D   Am   D/F#    G  Gadd4  Em Cmaj7/E


[Intro Pattern]
*Quick down/up/down strokes followed by downstrokes and repeat

eb|--------------------------------------------------------------------|
Bb|-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0|
Gb|-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0|
Db|-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0|
Ab|-222-2-2-2-2-2-2-2-3-3-3-3-3-3-3-3-222-2-2-2-2-2-2-2-3-3-3-3-3-3-3-3|
Eb|-333-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-333-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3|
    ↓↑↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓↑↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
     G                Gadd4            G                Gadd4

eb|--------------------------------------------------------------------|
Bb|-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0|
Gb|-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0|
Db|-222-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-222-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2|
Ab|-222-2-2-2-2-2-2-2-3-3-3-3-3-3-3-3-222-2-2-2-2-2-2-2-3-3-3-3-3-3-3-3|
Eb|-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-000-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0|
    ↓↑↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓↑↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
    Em                Cmaj7/E         Em                Cmaj7/E

[Picking Pattern]

[Fig. 1]

eb|-----------------|-----------------|
Bb|---0-----0-------|---0-----0-------|
Gb|-----0-----0---0-|-----0-----0---0-|
Db|-----------------|-----------------|
Ab|-3-----3-----3---|-5-----5-----5---|
Eb|-----------------|-----------------|


[Fig. 2]

eb|-----------------|-----------------|
Bb|---0-----0-------|---0-----0-------|
Gb|-----0-----0---0-|-----0-----0---0-|
Db|-----------------|-----------------|
Ab|-7-----7-----7---|-10----10----10--|
Eb|-----------------|-----------------|


[Intro]
(as per intro pattern above)
(Same quick ↓↑↓ pattern at the start of each bar through the whole intro ie. on every G, Em and Cadd9)
(* - single strum)

 G  Gadd4  G  Gadd4
 Em  Cmaj7/E  Em  Cmaj7/E
 G  Gadd4  G  Gadd4
 Em  Cmaj7/E  Em  Cmaj7/E

 Cadd9 G/B D
 Cadd9 G/B D
 Cadd9 G/B D
 G  Gadd4

 Fig. 1 x2 (before vox)


[Verse 1]

 Fig. 1                  Fig. 1
 Time is never time at all
                     Fig. 1                  Fig. 2
 You can never ever leave without leaving a piece of youth
 Fig. 1                         Fig. 1
    And our lives are forever changed,
                       Fig. 1                        Fig. 2
 We will never be the same; the more you change the less you feel

   Fig. 1   Fig.1          Fig.1    G  D/F#  Em
 Believe, believe in me, believe (believe)
       Am                     C                   G  D/F#  Em
 That life can change, that you're not stuck in vain
       Am                   C          Cadd9 G/B  D    Cadd9 G/B  D
 We're not the same, we're different toniiiiiiiiiiiIIIight


[Chorus]

   Cadd9 G/B D      Em         Am
 Toniiiiiiiiight, tonight, so bright
   Cadd9 G/B D     Cadd9 G/B D    G
 ToniiiiiiiiiiiIIIight,        tonight


[Instrumental]

(G)  Gadd4  G  Gadd4
 Em  Cmaj7/E  Em  Cmaj7/E


[Verse 2]

 G         Gadd4               G
   And you know you're never sure
          Gadd4                 Em
 But you're sure you could be right
          Cmaj7/E        Em          Cmaj7/E
 If you held yourself up to the light
 G         Gadd4         G          Gadd4         Em
   And the embers never fade in your city by the lake
      Cmaj7/E     Em          Cmaj7/E
 The place where you were born

   Fig. 1   Fig.1          Fig.1    G  D/F#  Em
 Believe, believe in me, believe (believe)
        Am        C          G  D/F#  Em
 In the resolute urgency of now
         Am                  C             Cadd9 G/B  D    Cadd9 G/B  D
 And if you believe there's not a chance toniiiiiiiiiiiIIIight


[Chorus]

   Cadd9 G/B D      Em         Am
 Toniiiiiiiiight, tonight, so bright
   Cadd9 G/B D       G  D/F#  Em
 Toniiiiiiiiight, tonight


[Bridge]

       Am           C           G    D/F# Em
 We'll crucify the insincere tonight (tonight)
        Am                       C             G    D/F# Em
 We'll make things right, we'll feel it all tonight (tonight)
        Am           C             G    D/F# Em
 We'll find a way to offer up the night (tonight)
         Am         C               G   D/F# Em
 The indescribable moments of your life (tonight)
        Am          C          G     D/F# Em
 The impossible is possible tonight (tonight)
    Am*               C*                  Fig. 1
 Believe in me as I believe in you.... tonight


[Outro]

    Fig. 1           Fig.1       G  D/F#  Em
 Tonight tonight, tonight, tonight


Looked for a tab for this recently and discovered that all the tabs were either 
missing a lot, completely wrong or extremely hard to follow so I said I'd give it a proper go.
First submitted tab but pretty sure it's right.

Sorry if the finger picking Fig. 1 and 2 stuff is a bit confusing.
I just wanted to get across the idea of where the first note of it is every time.

Let me know if you find any mistakes. Enjoy.

Six year later 2020 edit -
this gets so many views every week that I thought I should make it a little more accurate.

2023 edit - Added intro strumming pattern and filled out the chords over the second verse for completeness